AG Worm Wheels Reduction Ratio 10 ~ 60. AGF Worm Wheels. Series. Newly added. m2 ~ 6 Page 358. DG Plastic Worm Wheels. SUW Stainless Steel Worms

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1 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- ear Pair KWDL KWDLS Duplex s ADL Duplex Wheels KW round Shafts A Wheels AF Wheels SW round s A Wheels eduction atio ~ eduction atio ~ Series eduction atio ~ Series eduction atio ~ Series m. ~ 4 Page 34 SW Steel s Series m. ~ Page 37 m. ~ 4 Page 34 B Bronze Wheels eduction atio ~ Series Newly added m. ~ Page 37 m. ~ Page 34 C ray Iron Wheels eduction atio ~ Series Newly added m ~ Page 374 Newly added m. ~. Page 34 SUW Stainless Steel s Series m. ~ 3 Page 3 m ~ Page 3 D Plastic Wheels eduction atio ~ m.,. Page 3 m ~ Page 34 P Plastic Wheels eduction atio ~ Series Newly added m ~ 3 Page 3 Newly added m ~ Page 34 acks CP acks Catalog Number of KHK Stock The Catalog Number for KHK stock gears is based on the simple formula listed below. Please order KHK gears by specifying the Catalog Numbers. (Example) ear Pair s K W DL - Hand thread & Number of Starts (ight hand, Single thread) Module () Type (Duplex ) s (round ear) Type ( ) Material (SC) Wheels A. - Hand thread & Number of starts (ight hand, Double thread) Number of teeth () Module (.) Type ( Wheel) Material (CAC) Material Type K SC W s S S4C DL Duplex s SU SUS3 Information round S Shafts Material Type A CAC(*AlBC) Wheels B CAC(*PBC) DL Duplex Wheels C FC D Polyacetal * ( ) indicates old JIS designation P MC ear Pair earboxes Feature Icons ohs Compliant Product e-machinable Product Finished Product round ear esin Product Injection Molded Product Heat Treated Product Stainless Product Copper Alloy Product Black Oxide coated Product Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

2 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- ear Pair Characteristics The simplest way to obtain a large speed reduction with high torque in a compact space is with worm gear drives. KHK stock worms and worm wheels are available in s. to and in speed ratios of / to /, made in a variety of materials and styles. We also offer stock duplex worms and worm wheels with which you can obtain a very low backlash, high rotational precision system. The following table lists the main features for easy selection. Duplex s & Wheels s & Wheels Type Module KWDL ~4 KWDLS. ~ 4 Wheel No. of threads or reduction ratio Single thread Single thread ADL. ~ 4 ~ KW. ~ Wheel Wheel Single thread - Double thread A NOTE. ~. ~ AF NOTE ~ ~ SW ~ Wheel Single thread - Triple thread A NOTE ~ ~ SW. ~ SUW. ~ 3 Wheel Wheel Wheel Wheel Single thread - Double thread Single thread - Double thread B. ~ ~ Material ( )JIS Heat treatment Thermal refined, SC gear teeth induction hardened Thermal refined, SC gear teeth induction hardened CAC (AlBC) Thermal refined, SC gear teeth induction hardened CAC (AlBC) CAC (AlBC) S4C CAC (AlBC) S4C ear teeth induction hardened NOTE The material of cast hubs for AF and A worm wheels is FC(Cast Iron). A worm wheels mate primarily with SW worms. But, for Modules. or smaller, A worm wheels mate with KW worms. NOTE KHK stock worms and worm wheels are produced to KHK s own precision grades. See the Precision of s and Wheels in the Selection Hints section. Tooth surface finish round round Cut round Cut Cut round Cut Cut (Thread rolled) SUS3 Cut 4 CAC (PBC) Precision KHK W Features KHK W NOTE High-precision duplex worms with superior strength. A range of backlash values can be obtained by moving the worm axially. Duplex worms with a shaft, excellent in accuracy and strength. A range of backlash values can be obtained by moving the worm axially. 4 Cut 4 C ~ ~ FC Cut 4 D. ~. ~ Polyacetal Cut P ~ 3 ~ MC Cut Duplex worm wheels made of aluminum bronze, excellent in wear-resistance. The pitch accuracy is first grade. rounded finished worms with a shaft, including tooth surface quenching treatment. Allows compact design due to having small reference diameters. Made of aluminum bronze, have excellent wear-resistance. Wide selection is available for this item. Made of aluminum bronze, have excellent wear-resistance. Allows compact design. easonably priced ground worms. eady-to-use finished products from the J Series, are also available. Made of aluminum bronze, have excellent wear-resistance. Wide selection is available for this item. Economical, commonly used worms that have broad utility. eady-to-use finished products from the J Series are also available. ust-resistant worms made of stainless steel suitable for mating with DS or P worm wheels. Finished products for the J Series are also available. Phosphorous bronze worm wheels have excellent wear resistance. Interchangeable with C Wheels, and enhances strength. Economical, commonly used worm wheels that have broad utility. Available with a large selection of s and number of teeth. Fine pitch worm wheels made of polyacetal, a stable plastic material. Light weight and strong MC Nylon worm wheels. Suitable for use in food machinery, and can be used without lubricant. Our precision gear cutting technology enables acceleration and noise reduction Setting the proper tooth contact and the backlash is essential for using worm gears. Use KHK stock worm gears for safe, reliable use. rinding Machine by Klingelnberg gear testing machine by Klingelnberg 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KHK Technical Information. Efficiency of ear Pair The efficiency of power transmission varies somewhat with the conditions of assembly and lubricant, but is generally ~ % (excludes losses from bearings and churning of lubricants). The efficiency of KHK stock worm gear pair is given below as a reference. To learn more about strength calculations, please refer to the technical information contained in the Surface Durability of Cylindrical earing section on Page. Efficiency of KWDLS/ADL ear Pair ( %) (rpm = otation of worm) rpm KWDL KWDL- 3 4 KWDL KWDL3-4 4 KWDL3.- 4 KWDL Efficiency of KW/A, AF ear Pair ( %) (rpm = otation of worm) rpm KW KW KW KW KW- 4 KW KW KW4-4 7 KW KW KW KW.- 4 KW- 4 7 KW KW KW KW KW Efficiency of SW/A ear Pair ( %) (rpm = otation of worm) rpm SW SW SW- 3 4 SW SW3-4 4 SW SW SW SW- 4 7 SW SW SW SW SW SW SW SW SW Self-Locking Feature of ear Pair Self-locking is defined as the inability of worm wheels to drive the worms. Factors affecting the self-locking feature include the materials of the worm and worm wheel, lead angle, precision of manufacture, types of bearings, lubricant, etc. Thus, it is not dependent simply on the lead angle. But, in general, self-locking will occur when the lead angle in a single thread worm is less than 4. For systems requiring fail-safe prevention of back drive, we recommend other braking mechanisms or one-way clutches. Efficiency of SW, SUM / C, B, P ear Pair ( %) The efficiency is approximately as follows, depending on the assembly, loading, lubrication and rotational speed. Thread Efficiency(%) SW/SUW Single thread ~ % Double thread ~ % 34 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

4 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- ear Pair Selection Hints Please select the most suitable products by carefully considering the characteristics of items and contents of the product tables. It is also important to read all applicable CAUTION notes shown below before the final selection. Use of catalog numbers when ordering will simplify and expedite the processing of your order.. Caution in Selecting the Mating The Helixes of s and Wheels s and worm wheels have either right-hand or left-hand helix. The same hand worms and worm wheels comprise sets. However, H single thread LH single thread the number of threads and whether they use normal or axial system must also be matched. The table below shows available combinations of KHK stock worms and worm wheels. Mating Wheels Selection Chart KWDL KWDLS KW SW SW SUW Mating Wheel NOTE Helix/ Thread 3 L L ADL A.~. AF A 3 B L L C L L P D NOTE Select the same for both members.. Caution in Selecting Based on ear Strength The gear strength values shown in the product pages were compute by assuming a certain application environment as shown below. Therefore, they should be used as reference only. We recommend that each user computes their own values by applying the actual usage conditions. Calculation assumptions for Surface Durability Item KWDL KWDLS/ADL KW/AF, SW/A H double thread LH double thread Calculation assumptions for Bending Strength SW/B SW/C SUW/P SUW/D Formula NOTE Formula of worm gear's strength(jma-) The Lewis formula otations of worm rpm rpm Allowable bending stress(kgf/mm ) Lubricant Lubricant for gears with proper viscosity and with anti-pressure additives Lubrication Oil bath Starting condition Starting torque less than % of rated torque. Less than starts per hour. NOTE 3 Durability hours ( O C with No ( O C with No Impact from motor Uniform load Lubrication) Lubrication) Impact from load Uniform load Allowable stress factor S clim.7..4 NOTE The gear strength formula is based on JMA (Japanese ear Manufacturer s Association) specifications and MC Nylon Technical Data by Nippon Polypenco Limited. The units for the rotational speed (rpm) and the stress (kgf/mm) are adjusted to the units needed in the formula. NOTE 3 Allowable bending stress of D worm wheel is the value we estimated. The Maximum Allowable Sliding Speed Due to Heat The maximum allowable sliding speed for each series Max. Sliding Speed (m/s) of worm wheels is given on the right. Select the appropriate part by calculating the sliding speed. AF * ADL * Sliding speed νs(m/s) A * d B * : pitch dia. dn C *. νs = n : speed (rpm) cos γ P (no lubrication) γ : nominal lead angle * JMA- 34 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

5 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KHK Technical Information 3. Selecting s and Wheels by Precision The precision standards of KHK stock worms and worm wheels are established by us. The table below indicates the tolerance ranges for our products. Precision of worms(khk W ) KHK established allowable profile and lead errors of worms with precision grades to 4, by using the JIS Standard as reference. Lead errors are measured over one full revolution. Precision rades of s (KHK W ) (Unit: μm) Module over over over over Error m.4 mup m. m. up to to. up to. up to 4 rade 3 4 over m4 up to Tooth profile error Lead error 7 3 Tooth profile error 4 Lead error Tooth profile erro 3 37 Lead error Tooth profile error Lead error Precision of worm wheels (KHK W ) We have established standard grades to of worm wheels using the JIS Standard as reference. The allowable values of Single Pitch Error and unout Error are defined for each size and pitch diameter. 3 Overall Length Tolerance of s Overall Length Tolerance of s Series Total length(mm) Tolerance KWDL Precision rades of Wheels (KHK W ) Unit:μm Over m.4 up to Over m up to. Over m. up to. Over m. up to 4 Over m4 up to Pitch diameter (mm) SW SW SUW KWDLS KW Uniform Less than Over Uniform tolerance Overall Length Tolerance of s Wheels Total length(mm) below over up to over Tolerance CAUTION P Plastic Wheels are excluded. rade Error up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to up to 3 4 Single pitch error Total composite error Single pitch error Total composite error Single pitch error Total composite error Single pitch error Total composite error Single pitch error Total composite error Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

6 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- ear Pair Application Hints In order to use KHK stock worms and worm wheels safely, carefully read the Application Hints before proceeding. If there are questions or you require clarifications, please contact our technical department or your nearest distributor. KHK CO., LTD. TECHNICAL DEPATMENT PHONE: FAX: export@khkgears.co.jp or MAYLAND METI sales@mdmetric.com. Caution on Performing Secondary Operations If you are reboring, it is important to pay special attention to locating the center in order to avoid runout. (Fig.) The reference datum for gear cutting or grinding is the bore. (For worm shafts, it is ground portion of the shaft.) Therefore, use the bore or shaft for locating the center. If it is too difficult to do for small bores, the alternative is to use one spot on the bore and the runout of the side surface.. Points of Caution in Assembling KHK stock worms and worm wheels are designed such that when assembled according to the specified mounting distance with a tolerance of H7 to H, the backlash shown in the product tables is obtained. Do not attempt to eliminate backlash by pushing worms into worm wheels or operate with the worm shifted in the direction along the tooth. The figure below shows the datum clamp face of a worm wheel. When assembling worm gears, be sure that the worm axis is in the center of the worm wheel face width. Datum Clamp Face A A A Lathe Operation Hub - one side Hub - both sides ing geometry 3 Because of the helix of the gear teeth, worms and worm wheels produce axial thrust forces. The directions of thrust depend on the hand of the helix and the direction of rotation. This is illustrated below in Fig.. The bearings must be selected properly to be able to handle these thrust forces. See the ear Forces section in separate technical reference book for more details (Page 7). Direction of rotation and thrust force helical Driver Thrust bearing Driver If chucking operation using scroll chucks is to be done, we recommend the use of new or rebored jaws for improved precision. Fig. L helical To open up the bore to its maximum, calculate the bore size so that the tooth strength is weaker than the strength of the remaining material. For machining the maximum bore diameter, it should be designed so that the thickness between hub diameter (or root diameter) to bore diameter has more strength than the gear strength. As a guide, the maximum machined bore diameter should be within % to % of the hub diameter (or root diameter). When the keyway is processed, it should be % to %. In the case FC material is used, it should be lower by % or more. 3 Since worm wheels are molded products, they may have air bubbles inside the material. In case you find air bubbles inside when performing secondary operations, and if the bubbles are found to be troublesome, please contact your KHK distributor. Driver Thrust bearing Fig. Driver 4 Because large thrust forces act on worms, if they are not secured to the shaft firmly, they tend to shift. Use of step shafts, set screws, dowel pins, etc., are recommended. Also, check for loosening of bearings due to thrust forces. 344 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

7 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KHK Technical Information 3. Verifying the orientation of assembly How well the worms and worm wheels are assembled has large effects on the friction of the unit. The tooth contact at the time of assembly must be checked for correctness as shown below. See the Tooth Contact of a ear Pair section in separate technical reference book for more details (Page 7). Verify that the worm axis is perpendicular to the worm wheel axis. Check that the worm axis is in the center of the worm wheel face width. ood Bad ood Bad Error Error Error Error Check the mounting distance (allowable mounting distance H7 ~ H). Confirm that the center of the worm wheel goes through the midpoint of the worm length. ood Bad ood Bad Error Error H LH H LH The worm cannot rotate correctly if the worm wheel is engaged close to either end of its length. Application Examples SW s and C Wheels used in a rotating comb device SW s and B Wheels used in adjusting a cloth feeding device 34 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

8 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS & ADL Duplex Description of duplex worm gears The usual method of adjusting the backlash of a worm gear assembly is to modify the center distance. Once assembled, such adjustment requires a major rework of the gearbox housing. The use of duplex worm gears allows the backlash adjustment to be made by axially shifting the worm. This simplifies greatly the assembly and maintenance operations. Because of the unique characteristics of the product, please take time to study its construction and proper use. acks CP acks Backlash adjustment mechanism and method of adjustment The dual-lead worm is formed to give a difference between the right tooth surface and left tooth surface so that it provides a unique tooth profile in which the tooth thickness varies continuously, corresponding with the lead difference. (Fig.) The worm gear is also formed in its right and left tooth surface. When such a worm and worm gear are set up at a constant assembly distance and the worm is moved in the axial direction, the tooth thickness of the worm in mesh with the worm gear changes making backlash adjustment possible. An arrow marking on the outer circumference of the hub of the KHK duplex worm indicates the direction of assembly as well as acts as a guide for the backlash adjustment. When the worm is held with arrow mark pointing right, the tooth thickness is thinner on the right and thicker on the left. Therefore, moving the worm to the right causes the thicker teeth to come into actual engagement with the worm gear, thereby reducing the backlash. (Fig.) (a tooth surface pitch) (b tooth surface pitch) b tooth surface a tooth surface ear Pair earboxes CAUTION The amount of change in backlash ( j mm) in relation to the axial movement of the duplex worm shaft (V mm) can be calculated from the formula below. Δ j = V Fig. mb -ma ma +mb Where ma = Nominal Axial Module -(. Nominal Axial Module) mb = Nominal Axial Module +(. Nominal Axial Module) Application Examples (Nominal surface) eference tooth Moving the worm in the direction of the arrow causes the backlash to decrease. Fig. CAUTION The KHK duplex worm is designed so that, for all s, the backlash reduces by. mm when the worm is shifted mm. Adjusting Adjusting Shim Adjustment by using s * Adjustment by using Shims * 34 * The illustration above is a design example, not a design for machinery or a device in actual use. Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

9 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS & ADL Duplex Point of caution during assembly KHK duplex worm gears differs in between the right and left tooth surface and, therefore, you must orient the worm and worm wheel properly. Please carefully verify the following two aspects before proceeding with assembly.. Verifying the orientation of assembly An arrow indicating the orientation of assembly is stamped on both the duplex worm and worm wheel. When assembling the worm and worm wheel, check the worm wheel of the arrow mark on the front such that the direction of arrow mark on the worm coincides with that on the worm wheel. Should the assembly be incorrect, the center distance a will become larger than the normal distance, resulting in difficulty of assembly and improper gear engagement. (Fig.3) CP acks acks Arrow mark indicates the correct orientation of two gears when assembled. As shown, the two arrows must point in the same direction. Fig. 3. Verifying the reference position A V-groove (,.3 mm deep line) on tip peripheral of the duplex worm tooth marks the reference tooth. The gear set is designated to have a backlash of nearly zero ( ±.4) when the reference tooth is positioned in alignment with the center of rotation of the worm wheel with the center distance set at the value "a". (Fig.4) ear Pair earboxes eference tooth Center distance eference tooth Center distance Fig Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

10 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS Duplex s Module. acks CP acks Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle 7 ' Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC Nominal axial Number of Nominal starts lead angle Hand thread Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length LH7 M N O P Q KWDL- m 3 4' W Nominal axial Number of Nominal starts lead angle Hand thread Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P KWDLS.- m. 3 ' W KWDLS- m 3 4' W When the center distance is moved to reduce the backlash, the V max is the maximum amount of distance that you may shift without causing problems with the gear mesh. The V max is not a recommended value to use for adjustment when assembling. These worms produce axial thrust forces. See Page 344 for more details. * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see page. Vmax W4 ADL Duplex Wheels Module. Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle 7 ' Material CAC (formerly JIS AlBC) Heat treatment ear Pair eduction Nominal axial ratio No. of teeth Tooth hardness Helix angle Hand thread Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width AH7 B C D D' E F H earboxes ADL.- ADL.- ADL.-3 ADL.- ADL.- ADL.- ADL- ADL- ADL-3 ADL- ADL- ADL- 3 3 m. m ' 3 ' 3 ' 3 ' 3 ' 3 ' 3 4' 3 4' 3 4' 3 4' 3 4' 3 4' H H H H H H H H H H H H The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows. Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction. Please refer to the Application Hints on Page Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

11 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS Duplex s Vmax Position of reference tooth Max. allowable shift Weight S Vmax. KWDL- Position of Outside dia. Neck dia. Shaft dia. reference tooth Max. allowable shift Weight Q S T Vmax KWDLS KWDLS- W Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). acks CP acks ADL Duplex Wheels NOTE : Allowable torque for worm revolution (rpm) Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) Weight ear Pair ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ± ADL.- ADL.- ADL.-3 ADL.- ADL.- ADL.- ADL- ADL- ADL-3 ADL- ADL- ADL- earboxes Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. 34 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

12 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS Duplex s Module. 3 acks CP acks Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle 7 ' Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC Nominal axial Number of Nominal starts lead angle Hand thread Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length LH7 M N O P Q KWDL.- m. 3 ' W KWDL3- m3 3 4' W Nominal axial Number of Nominal starts lead angle Hand thread Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P KWDLS.- m. 3 ' W 4 37 KWDLS3- m3 3 4' W 4 44 When the center distance is moved to reduce the backlash, the V max is the maximum amount of distance that you may shift without causing problems with the gear mesh. The V max is not a recommended value to use for adjustment when assembling. These worms produce axial thrust forces. See Page 344 for more details. * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see page. Vmax W4 ADL Duplex Wheels Module. 3 Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle 7 ' Material CAC (formerly JIS AlBC) Heat treatment ear Pair eduction Nominal axial ratio No. of teeth Tooth hardness Helix angle Hand thread Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width AH7 B C D D' E F H earboxes ADL.- ADL.- ADL.-3 ADL.- ADL.- ADL.- ADL3- ADL3- ADL3-3 ADL3- ADL3- ADL3-3 3 m. m ' 3 ' 3 ' 3 ' 3 ' 3 ' 3 4' 3 4' 3 4' 3 4' 3 4' 3 4' H H H H H H The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows. Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction. Please refer to the Application Hints on Page Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

13 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS Duplex s Vmax Position of reference tooth Max. allowable shift Weight S Vmax.37 KWDL.- 3. KWDL3- Position of Outside dia. Neck dia. Shaft dia. reference tooth Max. allowable shift Weight Q S T Vmax KWDLS KWDLS3- W Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). acks CP acks ADL Duplex Wheels * has a sand mold casting finish. NOTE : Allowable torque for worm revolution (rpm) Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) Weight ear Pair () () () (4) (4) (4) () () () () (34) (4) ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ± ADL.- ADL.- ADL.-3 ADL.- ADL.- ADL.- ADL3- ADL3- ADL3-3 ADL3- ADL3- ADL3- earboxes Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

14 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS Duplex s Module 3. 4 acks CP acks Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle 7 ' Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC Nominal axial Number of Nominal starts lead angle Hand thread Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length LH7 M N O P Q KWDL3.- m ' W KWDL4- m4 3 4' W4 74 Nominal axial Number of Nominal starts lead angle Hand thread Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P KWDLS3.- m ' W 3 3 KWDLS4- m4 3 4' W 3 74 When the center distance is moved to reduce the backlash, the V max is the maximum amount of distance that you may shift without causing problems with the gear mesh. The V max is not a recommended value to use for adjustment when assembling. These worms produce axial thrust forces. See Page 344 for more details. * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see page. Vmax W4 ADL Duplex Wheels Module 3. 4 Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle 7 ' Material CAC (formerly JIS AlBC) * Heat treatment ear Pair earboxes ADL3.- ADL3.- ADL3.-3 ADL3.- ADL3.- ADL3.- ADL4- ADL4- ADL4-3 ADL4- ADL4- ADL4- eduction Nominal axial ratio 3 3 m3. m4 No. of teeth 3 3 Tooth hardness * H shape have a hub made from S4C cast iron. Helix angle Hand thread 3 47' 3 47' 3 47' 3 47' 3 47' 3 47' 3 4' 3 4' 3 4' 3 4' 3 4' 3 4' H H H H H Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width AH7 B C D D' E F H The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows. Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction. Please refer to the Application Hints on Page Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

15 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KWDL KWDLS Duplex s Vmax Position of reference tooth Max. allowable shift Weight S Vmax 37. KWDL KWDL4- Position of Outside dia. Neck dia. Shaft dia. reference tooth Max. allowable shift Weight Q S T Vmax KWDLS KWDLS4- W Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). acks CP acks ADL Duplex Wheels * has a sand mold casting finish. Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) H NOTE : Allowable torque for worm revolution (rpm) Weight ear Pair () () () (7) (7) (7) (7) (7) (4) () () () () (37) (77) () ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ±.4 ± ADL3.- ADL3.- ADL3.-3 ADL3.- ADL3.- ADL3.- ADL4- ADL4- ADL4-3 ADL4- ADL4- ADL4- earboxes Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

16 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Module.. acks KW.- KW.- KW.- KW.- Axial m. m. Number of Lead angle Hand thread starts 3 ' ' 3 4' 7 3' Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC W W W W Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P These worms produce axial thrust forces. See Page 344 for more details. W CP acks * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. A Wheels Module.. ear Pair earboxes A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- eduction ratio Transverse m. m. No. of teeth Number of Helix angle Hand thread starts Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) Heat treatment Tooth hardness 3 ' ' 3 ' ' 3 ' 3 ' 3 ' 3 4' 7 3' 3 4' 7 3' 3 4' 3 4' 3 4' The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

17 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts acks CP acks Outside dia. Neck dia. Shaft dia. Weight Q Sh KW.- KW.- KW.- KW.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/ or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). Use carbide tools for the modification of the shaft area near the bottom land. A Wheels Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash F (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) NOTE : Allowable torque for worm revolution (rpm) ~.4.~.4.~.4.~.4.~.4.~.4.~.4.~.7.~.7.~.7.~.7.~.7.~.7.~.7 Weight ear Pair earboxes A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- A.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

18 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Module. Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC W KW- KW- KW.- KW.- Axial m m. Number of Lead angle Hand thread starts 3 3' 7 ' 3 ' ' W W W W Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P 3 3 These worms produce axial thrust forces. See Page 344 for more details. A Wheels Module. eduction ratio A- A- A- A- A- A- A- A.- A.- A.- A.- A.- A.- A.- No. of Number teeth of starts Helix angle 3 3' 7 ' 3 3' 7 ' 3 3' 3 3' 3 3' 3 ' ' 3 ' ' 3 ' 3 ' 3 ' Hand AH7 B C D D' thread H H H H H H H H H H H H H H Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle AH7 Bore Material CAC (formerly JIS AlBC) B Hub dia. Heat treatment C Pitch dia. Tooth hardness D Throat dia. Module m m. Face width (E) 4 D' Outside dia. Hub width (F) (H) Web thickness Total length () 4 ( I ) Web O.D. offset (L) J Mounting distance * The precision grade of J Series products is equivalent to the value shown in the table. NOTE : Allowable torque for worm revolution (rpm) (H)( I ) J Allowable torque (N m) NOTE rpm rpm rpm rpm rpm rpm rpm Backlash (mm) The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available ~..~..~..~..~..~..~..~..~..~..~..~..~..~. H Weight Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

19 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Outside dia. Neck dia. Shaft dia. Weight Q S KW- KW- KW.- KW.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). Use carbide tools for the modification of the shaft area near the bottom land. A Series Wheels Newly added HT HK To order J Series products, please specify; + J + BOE Bore H7 Keyway Js size A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE [Caution on J series] * The product shapes of J Series items are identified by background color M M M As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

20 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Module. Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC W KW- KW- KW.- KW.- Axial m m. Number of Lead angle Hand thread starts ' ' 4 4' ' W W W W Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P These worms produce axial thrust forces. See Page 344 for more details AF Wheels Module. Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) * Heat treatment Tooth hardness * H, H shape have a hub made from FC cast iron. H AF- AF- AF- AF- AF- AF-3 AF- AF-4 AF- AF- AF.- AF.- AF.- AF.- AF.- AF.-3 AF.- AF.-4 AF.- AF.- eduction ratio Transverse m m. No. of teeth Number Profile shift of starts coefficient Helix angle ' ' ' ' ' ' ' ' ' ' 4 4' ' 4 4' 4 4' ' 4 4' 4 4' 4 4' 4 4' 4 4' Hand thread H H H H H H H H H H H H H H H H H H H H Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width() AH7 B C D D' E F The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. There may be space in the casting between the two materials, but it will not affect the joint strength. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

21 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Outside dia. Neck dia. Shaft dia. Weight Q S KW- KW- KW.- KW.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). Use carbide tools for the modification of the shaft area near the bottom land. AF Wheels H H * has a sand mold casting finish. NOTE : Allowable torque for worm revolution (rpm) Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash F (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) () () () (3) (3) (3) (7) () () (7) () () ~.4.~.4.~.4.~.4.~.4 Weight AF- AF- AF- AF- AF- AF-3 AF- AF-4 AF- AF- AF.- AF.- AF.- AF.- AF.- AF.-3 AF.- AF.-4 AF.- AF.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed ~.4.~.4.~.4.~.4.~.4.4~.7.4~.7.4~.7.4~.7.4~.7.4~.7.4~.7.4~.7.4~.7.4~.7 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

22 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Module 3 4 Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC W KW3- KW3- KW4- KW4- Axial m3 m4 Number of Lead angle Hand thread starts 4 3' ' 43' ' W W W W Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P These worms produce axial thrust forces. See Page 344 for more details AF Wheels Module 3 4 Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) * Heat treatment Tooth hardness * H, H shape have a hub made from FC cast iron. H AF3- AF3- AF3- AF3- AF3- AF3-3 AF3- AF3-4 AF3- AF3- AF4- AF4- AF4- AF4- AF4- AF4-3 AF4- AF4-4 AF4- AF4- eduction ratio Transverse m3 m4 No. of teeth Number Profile shift of starts coefficient Helix angle 4 3' ' 4 3' 4 3' ' 4 3' 4 3' 4 3' 4 3' 4 3' 43' ' 43' 43' ' 43' 43' 43' 43' 43' Hand thread H H H H H H H H H H H H H H H H H H H H Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width() AH7 B C D D' E F The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. There may be space in the casting between the two materials, but it will not affect the joint strength. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

23 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Outside dia. Neck dia. Shaft dia. Weight Q S KW3- KW3- KW4- KW4- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). Use carbide tools for the modification of the shaft area near the bottom land. AF Wheels H H H * has a sand mold casting finish. NOTE : Allowable torque for worm revolution (rpm) Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash F (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) () () () () () () () () () () (3) () () () Weight Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed ~..~..~..~..~..~..~..~..~..~..~.3.~.3.~.3.~.3.~.3.~.3.~.3.~.3.~.3.~ AF3- AF3- AF3- AF3- AF3- AF3-3 AF3- AF3-4 AF3- AF3- AF4- AF4- AF4- AF4- AF4- AF4-3 AF4- AF4-4 AF4- AF4-3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

24 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Module Precision grade KHK W grade eference section of gear Axial ear teeth Standard full depth pressure angle Material SC Heat treatment Thermal refined, tooth surface induction hardened Tooth hardness ~ HC W Axial Number of Lead angle Hand thread starts Total length Shaft length (L) Neck length (L) Face width Neck length () Shaft length () Pitch dia. J K L M N O P KW- m 43' W 7 7 KW- m 43' W These worms produce axial thrust forces. See Page 344 for more details. * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. AF Wheels Module Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) * Heat treatment Tooth hardness * H, H shape have a hub made from FC cast iron. H AF- AF- AF- AF-3 AF- AF-4 AF- AF- AF- AF- AF- AF-3 AF- AF-4 AF- AF- eduction ratio Transverse m m No. of teeth Number Profile shift of starts coefficient Helix angle 43' 43' 43' 43' 43' 43' 43' 43' 43' 43' 43' 43' 43' 43' 43' 43' Hand thread H H H H H H H H H H H H H H H H Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width() AH7 B C D D' E F The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. There may be space in the casting between the two materials, but it will not affect the joint strength. 3 For H-shaped products with a bore size of φ or more, the bore tolerance is H Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

25 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KW round Shafts Outside dia. Neck dia. Shaft dia. Weight Q S 3..7 KW KW- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). Use carbide tools for the modification of the shaft area near the bottom land. AF Wheels H * has a sand mold casting finish. Hub width (L) Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash F' (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) () () () () () () () () (3) (7) H NOTE : Allowable torque for worm revolution (rpm) Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed. H ~.3.~.3.~.3.~.3.~.3.~.3.~.3.~.3.4~.37.4~.37.4~.37.4~.37.4~.37.4~.37.4~.37.4~.37 Weight AF- AF- AF- AF-3 AF- AF-4 AF- AF- AF- AF- AF- AF-3 AF- AF-4 AF- AF- Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

26 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW round s Module. Precision grade eference section of gear ear teeth KHK W grade * Axial Standard full depth pressure angle Material S4C : J Series (Available-on-request) Axial Number of Lead angle Hand thread starts SW- 3 3' m SW- 7 ' SW.- SW.-J 3 ' m. SW.- SW.-J ' Heat treatment Tooth hardness Teeth induction hardened ~ HC * The precision grade of J Series products is equivalent to the value shown in the table. W W W WK W WK Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH7 M N O P Q Q' For W-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw. These worms produce axial thrust forces. See Page 344 for more details. Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). W A Wheels Module. eduction ratio A- A- A- A- A- A- A- A.- A.- A.- A.- A.- A.- A.- No. of Number teeth of starts Helix angle 3 3' 7 ' 3 3' 7 ' 3 3' 3 3' 3 3' 3 ' ' 3 ' ' 3 ' 3 ' 3 ' Hand AH7 B C D D' thread H H H H H H H H H H H H H H Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) Heat treatment Tooth hardness Module m m. Face width (E) 4 Hub width (F) Total length () 4 offset (L) * The precision grade of J Series products is equivalent to the value shown in the table J Allowable torque (N m) NOTE rpm rpm rpm rpm rpm rpm rpm AH7 Bore B Hub dia. C Pitch dia. D Throat dia. D' Outside dia. (H) Web thickness ( I ) Web O.D. J Mounting distance NOTE : Allowable torque for worm revolution (rpm) Backlash (mm).~..~..~..~..~..~..~..~..~..~..~..~..~..~. H Weight The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

27 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Series round s W WK Total length Keyway Set Weight Width Depth Size S x. 4 x. [Caution on J series] : J Series (Available-on-request) SW- SW- SW.- SW.-J SW.- SW.-J As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Areas of products which have been re-worked will not be black oxide coated. For products having a tapped hole, a set screw is included. A Series Wheels Newly added HT HK To order J Series products, please specify; + J + BOE Bore H7 Keyway Js size A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE [Caution on J series] * The product shapes of J Series items are identified by background color NOTE : Allowable torque for worm revolution (rpm) M M M As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. The use of HT shaped Set s for fastening gears to a shaft is a method only applicable to the usage for light loads. For secure fastening, please use dowel pins in combination. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

28 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW round s Module. Precision grade KHK W grade * eference section of gear Axial ear teeth Standard full depth pressure angle Material S4C acks CP acks Heat treatment Teeth induction hardened Tooth hardness ~ HC W3 * The precision grade of J Series products is equivalent to the value shown in the table. Axial Number of Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) Lead angle Hand thread : J Series (Available-on-request) starts LH7 M N O P Q Q' SW- W3 SW-J 3 4' W3K SW-J4 W3K 4 m SW- W3 SW-J 7 ' W3K SW-J4 W3K 4 SW.- W3 SW.-J W3K SW.-J 3 ' W3K SW.-J7 W3K 7 m. SW.- W3 SW.-J W3K SW.-J 7 4' W3K SW.-J7 W3K 7 These worms produce axial thrust forces. See Page 344 for more details. A Wheels Module. ear Pair earboxes 3 eduction ratio A- A- A- A- A- A- A- A.- A.- A.- A.- A.- A.- A.- No. of Number teeth of starts Helix angle 3 4' 7 ' 3 4' 7 ' 3 4' 3 4' 3 4' 3 ' 7 4' 3 ' 7 4' 3 ' 3 ' 3 ' Precision grade KHK W grade * eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) ** Heat treatment Tooth hardness Module m m. Face width (E) Hub width (F) 4 Total length () 34 offset (L) 7. 7 * The precision grade of J Series products is equivalent to the value shown in the table. ** H4, H shape have a hub made from FC cast iron. AH7 Bore B Hub dia. C Pitch dia. D Throat dia. D' Outside dia. (H) Web thickness ( I ) Web O.D. J Mounting distance H NOTE : Allowable torque for worm revolution (rpm) Hand thread AH7 B C D D' (H)( I ) J Allowable torque (N m) NOTE Backlash Weight rpm rpm rpm rpm rpm rpm rpm (mm) H H H H ~.4. H H 4 () (3) H 4 () () H H H H ~.7.7 H 4 7. () () H 3. () () H 7. () () The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. There may be space in the casting between the two materials, but it will not affect the joint strength. Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed. H4 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

29 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Series round s Total length Keyway Set Weight Width Depth Size S 4 x. x.3 4 x. x.3 x.3 x.3 x.3 x.3 x.3 x.3 [Caution on J series] : J Series (Available-on-request) SW- SW-J SW-J4 SW- SW-J SW-J4 SW.- SW.-J SW.-J SW.-J SW.- SW.-J SW.-J Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). SW.-J7 As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Areas of products which have been re-worked will not be black oxide coated. For products having a tapped hole, a set screw is included. W3K A acks CP acks Series Wheels Newly added Bore H7 Keyway Js size A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE A.- J BOE [Caution on J series] H HK To order J Series products, please specify; + J + BOE M M M As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. H4K * The product shapes of J Series items are identified by background color. HK ear Pair earboxes 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

30 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW round s Module 3 4 Precision grade KHK W grade * eference section of gear Axial ear teeth Standard full depth pressure angle Material S4C acks CP acks : J Series (Available-on-request) SW3- SW3-J7 SW3-J SW3-J SW3-J SW3- SW3-J7 SW3-J SW3-J SW3-J SW3-3 SW3-3J7 SW3-3J SW3-3J SW3-3J SW4- SW4- SW4-3 Axial m3 m4 Heat treatment Teeth induction hardened Tooth hardness ~ HC W3 * The precision grade of J Series products is equivalent to the value shown in the table. Number of Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) Lead angle Hand thread starts LH7 M N O P Q Q' 3 4' 7 4' 3 34' 3 3 4' 7 ' 7' W3 W3K W3K W3K W3K W3 W3K W3K W3K W3K W3 W3K W3K W3K W3K W3 W3 W These worms produce axial thrust forces. See Page 344 for more details. A Wheels Module 3 4 ear Pair earboxes 3 eduction ratio A3- A3- A3- A3- A3-3 A3- A3-43 A3- A3- A4- A4- A4- A4- A4-3 A4- A4-43 A4- A4- No. of Number teeth of starts Helix angle 3 4' 7 4' 3 4' 7 4' 34' 3 4' 34' 3 4' 3 4' 3 4' 7 ' 3 4' 7 ' 7' 3 4' 7' 3 4' 3 4' Precision grade KHK W grade * eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) ** AH7 Bore Heat treatment Tooth hardness B Hub dia. Module m3 m4 C Pitch dia. Face width (E) D Throat dia. Hub width (F) D' Outside dia. Total length () 43 (H) Web thickness offset (L) ( I ) Web O.D. * The precision grade of J Series products is equivalent to the value shown in the table. J Mounting distance ** H4, H shape have a hub made from FC cast iron. The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. There may be space in the casting between the two materials, but it will not affect the joint strength. H NOTE : Allowable torque for worm revolution (rpm) Hand thread AH7 B C D D' (H)( I ) J Allowable torque (N m) NOTE Backlash rpm rpm rpm rpm rpm rpm rpm (mm) H H H4 H4 H4 H H H H4 H4 H4 H () () () () () () () (7) (3) () () () () (3) (73) () H ~ ~ Weight Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

31 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Series round s Total length Keyway Set Weight Width Depth Size S x.3 x. x. x. x.3 x. x. x. x.3 x. x. x. M M M M M M M M M : J Series (Available-on-request) SW3- SW3-J7 SW3-J SW3-J SW3-J SW3- SW3-J7 SW3-J SW3-J SW3-J SW3-3 SW3-3J7 SW3-3J SW3-3J SW3-3J SW4- SW4- SW4-3 W3K [Caution on J series] As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Areas of products which have been re-worked will not be black oxide coated. For products having a tapped hole, a set screw is included. Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. vvvv). Series A Wheels Newly added acks CP acks Bore H7 Keyway Js size A3- J BOE A3- J BOE A3- J BOE A3- J BOE A3-3 J BOE A3- J BOE A3-43 J BOE A3- J BOE A3- J BOE H HK To order J Series products, please specify; + J + BOE [Caution on J series] Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed. As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. H4K * The product shapes of J Series items are identified by background color M M M M HK ear Pair earboxes 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

32 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW round s Module Precision grade KHK W grade eference section of gear ear teeth Axial Standard full depth pressure angle Material S4C Heat treatment Tooth hardness Teeth induction hardened ~ HC W3 SW- SW- SW- SW- Axial m m Number of Lead angle Hand thread starts 4 ' ' 4 7' 3' W3 W3 W3 W3 Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH7 M N O P Q Q' 3 3 These worms produce axial thrust forces. See Page 344 for more details. 3 3 * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. A Wheels Module Precision grade KHK W grade eference section of gear otating plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS AlBC) * Heat treatment Tooth hardness * H4, H shape have a hub made from FC cast iron. H4 A- A- A- A- A- A- A- A- A- A- A- A- A- A- eduction ratio Transverse m m No. of teeth Number of Helix angle Hand thread starts 4 ' ' 4 ' ' 4 ' 4 ' 4 ' 4 7' 3' 4 7' 3' 4 7' 4 7' 4 7' H4 H4 H H H H H H4 H4 H H H H H Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. There may be space in the casting between the two materials, but it will not affect the joint strength Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

33 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW round s Total length Set Weight Size S SW- SW- SW- SW- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. to 3 mm). acks A Wheels CP acks H NOTE. Allowable torques for worm rotation (rpm) Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash F (H) ( I ) J rpm rpm rpm rpm rpm rpm rpm (mm) () () (3) (3) (4) () () () () () () () () () () (4) (4) () () (3) ~.3.~.3.~.3.~.3.~.3.~.3.~.3.4~.37.4~.37.4~.37.4~.37.4~.37.4~.37.4~.37 Weight A- A- A- A- A- A- A- A- A- A- A- A- A- A- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed ear Pair earboxes 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

34 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module.. Precision grade KHK W grade 4 eference section of gear plane ear teeth Standard full depth pressure angle Material S4C acks SW.- SW.- SW.- SW.- m. m. Heat treatment Tooth hardness (less than 4) Number of starts Lead angle Hand thread Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH M N O P Q Q' 3' 3' 3 7' 34' W W W W For W-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw. These worms produce axial thrust forces. See Page 344 for more details. W CP acks B Bronze Wheels Module.. Precision grade KHK W grade 4 eference section of gear plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS PBC) Heat treatment Tooth hardness T ear Pair earboxes B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- eduction ratio eduction ratio m. m. No. of teeth No. of teeth Number of Helix angle Hand thread starts Number of Helix angle Hand thread starts 3' 3' 3' 3' 3' 3' 3' 3 7' 34' 3 7' 34' 3 7' 3 7' 3 7' T T T T T T T Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E Wheels are profile shifted to create the proper center distance. For products with a tapped hole, a set screw is included. 3 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. 4 If bore size is less than φ 4, the diameter tolerance is H. If bore size is φ or φ, and the hole length exceeds 3 times the diameter, the tolerance is also H. 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

35 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. Total length Set Weight Size S M3 M SW.- SW.- SW.- SW.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. acks B CP acks Bronze Wheels NOTE : Allowable torque for worm revolution (rpm) Hub width Total length Mounting distance Set Allowable torque (N m) NOTE Backlash F J Size L rpm rpm rpm rpm rpm rpm (mm) M3 M3 M3 M NOTE : Allowable torque for worm revolution (rpm) Hub width Total length Mounting distance Allowable torque (N m) NOTE Backlash F J rpm rpm rpm rpm rpm rpm (mm) ~..4~..4~..4~..4~..4~..4~ Weight ~. ~. ~. ~. ~. ~. ~. Weight B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- B.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear Pair earboxes 373 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

36 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module. Precision grade KHK W grade 4 eference section of gear plane ear teeth Standard full depth pressure angle Material S4C acks CP acks ear Pair earboxes SW- SW- SW.- SW.- B C m m. Number of Lead angle Hand thread starts 3 3' 7 ' 3 ' ' Heat treatment Tooth hardness (less than 4) W W W W Bronze Wheels & ray Iron Wheels Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH7 M N O P Q Q' Module. Wheels are profile shifted to create the proper center distance. The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. 3 If bore size is less than φ 4, the diameter tolerance is H. If bore size is φ or φ, and the hole length exceeds 3 times the diameter, the tolerance is also H For W-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw. These worms produce axial thrust forces. See Page 344 for more details. 3 If bore size is less than φ 4, the diameter tolerance is H. If bore size is φ or φ, and the hole length exceeds 3 times the diameter, the tolerance is also H. * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. eduction ratio B- B- B- B- B- B- B.- B.- B.- B.- B.- B.- C- C- C- C- B C Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS PBC) FC Heat treatment Tooth hardness Module m m. m Face width (E) Hub width (F) Total length () offset (L) 4. * The precision grade of J Series products is equivalent to the value shown in the table. No. of Number Helix angle AH7 B C D D' teeth of starts Hand thread 3 3' 7 ' 3 3' 7 ' 3 3' 3 3' 3 ' ' 3 ' ' 3 ' 3 ' H 3 3' AH7 Bore B Hub dia. C Pitch dia. D Throat dia. D' Outside dia. (H) Web thickness ( I ) Web O.D. J Mounting distance J B H NOTE : Allowable torque for worm revolution (rpm) Allowable torque (N m) NOTE Backlash rpm rpm rpm rpm rpm rpm (mm) ~ C Weight ~ ~.4.. W Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. 374 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Total length Set Weight Size S M M SW- SW- SW.- SW.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. acks Series B C CP acks Bronze Wheels & ray Iron Wheels Newly added Bore H7 Keyway Js size B- J Bore B- J Bore B- J Bore B- J Bore B- J Bore B- J Bore B.- J Bore B.- J Bore B.- J Bore B.- J Bore B.- J Bore B.- J Bore C- J Bore C- J Bore C- J Bore C- J Bore [Caution on J series] HT To order J Series products, please specify; + J + BOE * The product shapes of J Series items are identified by background color M M HK ear Pair earboxes As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. The use of HT shaped Set s for fastening gears to a shaft is a method only applicable to the usage for light loads. For secure fastening, please use dowel pins in combination. 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

38 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module. Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle Material S4C acks CP acks ear Pair earboxes Heat treatment W Tooth hardness (less than 4) * The precision grade of J Series products is equivalent to the value shown in the table. Number of Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) Lead angle Hand thread : J Series (Available-on-request) starts LH7 M N O P Q Q' SW.- W SW.-J 3 ' WT SW.-J WK m. SW.- W SW.-J 4' WT SW.-J WK These worms produce axial thrust forces. See Page 344 for more details. B.- B.- B.- B.- B.- B.- C.- C.- C.- C.- C.- C.- B C eduction ratio Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. Bronze Wheels & ray Iron Wheels 3 ' 4' 3 ' 4' 3 ' 3 ' 3 ' B C Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle Material CAC (formerly JIS PBC) FC Heat treatment Tooth hardness Hub width (F) offset (L) * The precision grade of J Series products is equivalent to the value shown in the table. No. of Number Helix angle AH7 B C D D' E teeth of starts Hand thread H AH7 Bore B Hub dia. C Pitch dia. D Throat dia. D' Outside dia. E Face width Total length (H) Web thickness ( I ) Web O.D. J Mounting distance J Module. Wheels are profile shifted to create the proper center distance. The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details B H NOTE : Allowable torque for worm revolution (rpm) Allowable torque (N m) NOTE Backlash (mm) rpm rpm rpm rpm rpm rpm ~. C Weight Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

39 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Series Steel s Total length Keyway Set Weight Width Depth Size S M 4 x. 4 x. [Caution on J series] M : J Series (Available-on-request) SW.- SW.-J SW.-J SW.- SW.-J SW.-J acks CP acks WT As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Areas of products which have been re-worked will not be black oxide coated. For products having a tapped hole, a set screw is included. Series WK B C Bronze Wheels & ray Iron Wheels Newly added Bore H7 Keyway Js size B.- J BOE B.- J BOE B.- J BOE B.- J BOE B.- J BOE B.- J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE [Caution on J series] HT To order J Series products, please specify; + J + BOE HK * The product shapes of J Series items are identified by background color M M M ear Pair earboxes As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. The use of HT shaped Set s for fastening gears to a shaft is a method only applicable to the usage for light loads. For secure fastening, please use dowel pins in combination. 377 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

40 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle 4 ' Material S4C acks CP acks ear Pair earboxes Heat treatment W Tooth hardness (less than 4) * The precision grade of J Series products is equivalent to the value shown in the table. Number of Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) Lead angle Hand thread : J Series (Available-on-request) starts LH7 M N O P Q Q' SW- W SW-J 3 4' WK SW-J4 WK 4 SW- W SW-J 7 ' WK SW-J4 WK 4 m SW-L W SW-LJ 3 4' L WK SW-LJ4 WK 4 SW-L W SW-LJ 7 ' L WK SW-LJ4 WK 4 These worms produce axial thrust forces. See Page 344 for more details. B- B- B-L B-L C- C- C- C- C- C- C- C- C-L C-L C-L C-L C-L C-L C-L C-L B C eduction ratio Bronze Wheels & ray Iron Wheels No. of teeth Number of starts B C Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle 4 ' Material CAC (formerly JIS PBC) FC Heat treatment Tooth hardness Face width (E) Hub width (F) 3 Total length () 3 offset (L). * The precision grade of J Series products is equivalent to the value shown in the table. Helix angle 3 4' 7 ' 3 4' 7 ' 3 4' 7 ' 3 4' 7 ' 3 4' 3 4' 7 ' 3 4' 3 4' 7 ' 3 4' 7 ' 3 4' 3 4' 7 ' 3 4' Hand AH7 B C D D' thread L L H H H (7) (7) () () () () () () NOTE : Allowable torque for worm revolution (rpm) Allowable torque (N m) NOTE rpm rpm rpm rpm rpm rpm Module ~. Wheels are profile shifted to create the proper center distance. The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. AH7 Bore B Hub dia. C Pitch dia. D Throat dia. D' Outside dia. (H) Web thickness ( I ) Web O.D. J Mounting distance (H)( I ) J H B C ** has a sand mold casting finish. Backlash (mm) Weight Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

41 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Series Steel s Total length Keyway Width Depth Set Size S Weight. 4 4 x. 7. x x. x.3 4 x. x.3 4 x. x : J Series (Available-on-request) SW- SW-J SW-J4 SW- SW-J SW-J4 SW-L SW-LJ SW-LJ4 SW-L SW-LJ WK [Caution on J series] As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Areas of products which have been re-worked will not be black oxide coated. For products having a tapped hole, a set screw is included. SW-LJ4 Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick- Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. B C acks CP acks Series Bronze Wheels & ray Iron Wheels Newly added HK To order J Series products, please specify; + J + BOE Bore H7 Keyway Js size B- J BOE B- J BOE B-L J BOE B-L J BOE C- J BOE C- J BOE C- J BOE C- J BOE C- J BOE C- J BOE C- J BOE C- J BOE C-L J BOE C-L J BOE C-L J BOE C-L J BOE C-L J BOE C-L J BOE C-L J BOE C-L J BOE Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. K * The product shapes of J Series items are identified by background color M M M ear Pair earboxes 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

42 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module. Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle Material S4C acks CP acks ear Pair earboxes : J Series (Available-on-request) SW.- SW.-J SW.-J SW.-J7 SW.- SW.-J SW.-J SW.-L SW.-LJ SW.-LJ SW.-L SW.-LJ SW.-LJ B.- B.- B.-L B.-L C.- C.- C.- C.- C.- C.- C.- C.- C.-L C.-L C.-L C.-L C.-L C.-L C.-L C.-L B C Bronze Wheels & ray Iron Wheels 3 ' 7 4' 3 ' 7 4' 3 ' 7 4' 3 ' 7 4' 3 ' 3 ' 7 4' 3 ' 3 ' 7 4' 3 ' 7 4' 3 ' 3 ' 7 4' 3 ' Number of Lead angle Hand thread starts SW.-J7 7 4' m. L L 3 ' H 3 H H H H H H H H Heat treatment SW.-LJ7 3 ' L Tooth hardness (less than 4) * The precision grade of J Series products is equivalent to the value shown in the table W WK WK WK W WK WK WK W WK WK WK W WK WK WK Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH7 M N O P Q Q' () () () () () () () (3) () () () (3) Module. B C.3~.3 W ' L SW.-LJ7 These worms produce axial thrust forces. See Page 344 for more details. eduction ratio No. of Number teeth of starts B C Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle 4 ' Material CAC (formerly JIS PBC) FC Heat treatment Tooth hardness Face width (E) Hub width (F) 4 Total length () 3 offset (L) 7 * The precision grade of J Series products is equivalent to the value shown in the table. Helix angle Hand AH7 B C D D' thread ** has a sand mold casting finish. Wheels are profile shifted to create the proper center distance. The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. AH7 Bore B Hub dia. C Pitch dia. D Throat dia. D' Outside dia. (H) Web thickness ( I ) Web O.D. J Mounting distance (H)( I ) J H NOTE : Allowable torque for worm revolution (rpm) Allowable torque (N m) NOTE rpm rpm rpm rpm rpm rpm Backlash (mm) Weight Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

43 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- Series Steel s Newly added SW Total length Keyway Width Depth Set Size S Weight 3.3 x.3.3 x.3.37 x x.3.3 x.3.37 x x.3.3 x.3.37 x x.3.3 x.3.37 x.3.3 : J Series (Available-on-request) SW.- SW.-J SW.-J SW.-J7 SW.- SW.-J SW.-J SW.-J7 SW.-L SW.-LJ SW.-LJ SW.-LJ7 SW.-L SW.-LJ SW.-LJ SW.-LJ7 WK Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. [Caution on J series] As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Areas of products which have been re-worked will not be black oxide coated. For products having a tapped hole, a set screw is included. B C acks CP acks Series Bronze Wheels & ray Iron Wheels Newly added B.- J BOE B.- J BOE B.-L J BOE B.-L J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE C.- J BOE C.-L J BOE C.-L J BOE C.-L J BOE C.-L J BOE C.-L J BOE C.-L J BOE C.-L J BOE C.-L J BOE HK To order J Series products, please specify; + J + BOE Bore H7 Keyway Js size Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. K * The product shapes of J Series items are identified by background color M M M ear Pair earboxes 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

44 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module 3 Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle 4 ' Material S4C acks CP acks : J Series (Available-on-request) SW3- SW3-J7 SW3-J SW3-J SW3-J SW3- SW3-J7 SW3-J SW3-J SW3-J SW3-L SW3-LJ7 SW3-LJ SW3-LJ SW3-LJ SW3-L SW3-LJ7 SW3-LJ SW3-LJ SW3-LJ m3 Heat treatment Tooth hardness (less than 4) * The precision grade of J Series products is equivalent to the value shown in the table. Number of Lead angle Hand thread starts 3 ' 7 ' 3 ' L 7 ' L W WK WK WK WK W WK WK WK WK W WK WK WK WK W WK WK WK WK Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH7 M N O P Q Q' W ear Pair earboxes 3 B3- B3- B3-L B3-L C3- C3- C3- C3- C3- C3- C3- C3- C3-L C3-L C3-L C3-L C3-L C3-L C3-L C3-L B C eduction ratio Bronze Wheels & ray Iron Wheels B C Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth AH7 Bore pressure angle 4 ' B Hub dia. Material CAC (formerly JIS PBC) FC C Pitch dia. Heat treatment D Throat dia. Tooth hardness D' Outside dia. Hub width (F) E Face width offset (L) 7. Total length H * The precision grade of J Series products is equivalent to the value shown in the table. (H) Web thickness No. of Number Helix angle AH7 B C D D' teeth of starts Hand thread 3 ' 7 ' 3 ' 7 ' 3 ' 7 ' 3 ' 7 ' 3 ' 3 ' 7 ' 3 ' 3 ' 7 ' 3 ' 7 ' 3 ' 3 ' 7 ' 3 ' L L H H H H H H H H H () 4 () () 4 () (7) (3) (3) () (7) (3) (3) () Module 3 Wheels are profile shifted to create the proper center distance. The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. ( I ) Web O.D. J Mounting distance E (H)( I ) J B NOTE : Allowable torque for worm revolution (rpm) Allowable torque (N m) NOTE rpm rpm rpm rpm rpm rpm C ** has a sand mold casting finish. Backlash (mm).~. Weight Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

45 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Series Steel s Newly added Total length Keyway Set Weight Width Depth Size S x.3 x. x. x. x.3 x. x. x. x.3 x. x. x. x.3 x. x. x. M M M M M M M M M M M M : J Series (Available-on-request) SW3- SW3-J7 SW3-J SW3-J SW3-J SW3- SW3-J7 SW3-J SW3-J SW3-J SW3-L SW3-LJ7 SW3-LJ SW3-LJ SW3-LJ SW3-L SW3-LJ7 SW3-LJ SW3-LJ SW3-LJ Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. Series WK [Caution on J series] As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Areas of products which have been re-worked will not be black oxide coated. For products having a tapped hole, a set screw is included. B C Bronze Wheels & ray Iron Wheels Newly added acks CP acks HK To order J Series products, please specify; + J + BOE Bore H7 * The product shapes of J Series items are identified by background color. Keyway Js 3 3 size M M M B3- J BOE B3- J BOE B3-L J BOE B3-L J BOE C3- J BOE C3- J BOE C3- J BOE C3- J BOE C3- J BOE C3- J BOE C3- J BOE C3- J BOE C3-L J BOE C3-L J BOE C3-L J BOE C3-L J BOE C3-L J BOE C3-L J BOE C3-L J BOE C3-L J BOE Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. K [Caution on J series] As available-on-request products, requires a leadtime for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. ear Pair earboxes Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

46 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module 4 Precision grade KHK W grade 4 eference section of gear plane ear teeth Standard full depth pressure angle 4 ' Material S4C SW4- SW4- SW4-L SW4-L m4 m4 Number of Lead angle Hand thread starts 3 4' 7 ' 3 4' 7 ' Heat treatment Tooth hardness L L (less than 4) W W W W Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH7 M N O P Q Q' These worms produce axial thrust forces. See Page 344 for more details. W acks CP acks * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. B C Bronze Wheels & ray Iron Wheels B C Precision grade KHK W grade 4 KHK W grade 4 eference section of gear plane plane ear teeth Standard full depth Standard full depth pressure angle 4 ' 4 ' Material CAC(formerly JIS PBC) FC Heat treatment Tooth ardness Module 4 B C H ear Pair earboxes B4- B4- B4-L B4-L C4- C4- C4- C4- C4- C4- C4- C4- C4-L C4-L C4-L C4-L C4-L C4-L C4-L C4-L eduction ratio eduction ratio m4 m4 No. of teeth No. of teeth Number of Helix angle Hand thread starts 3 4' 7 ' 3 4' 7 ' L L Number of Helix angle Hand thread starts 3 4' 7 ' 3 4' 7 ' 3 4' 3 4' 7 ' 3 4' 3 4' 7 ' 3 4' 7 ' 3 4' 3 4' 7 ' 3 4' L L L L L L L L H H H H H H H H H H H H H H Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E Wheels are profile shifted to create the proper center distance. H have elongated casting holes in the web (H). 3 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

47 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Total length Set Weight Size S SW4- SW4- SW4-L SW4-L Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. acks B C CP acks Bronze Wheels & ray Iron Wheels H * has a sand mold casting finish. NOTE : Allowable torque for worm revolution (rpm) Hub width Total length Mounting distance Allowable torque (N m) NOTE Backlash F J rpm rpm rpm rpm rpm rpm (mm) NOTE : Allowable torque for worm revolution (rpm) Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash F (H) ( I ) J rpm rpm rpm rpm (mm) () () () () () () () () () () () () () () (3) (7) (7) () () () (3) (7) (7) () ~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37.7~.37 Weight.... Weight B4- B4- B4-L B4-L C4- C4- C4- C4- C4- C4- C4- C4- C4-L C4-L C4-L C4-L C4-L C4-L C4-L C4-L Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear Pair earboxes 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

48 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SW Steel s Module Precision grade KHK W grade 4 eference section of gear plane ear teeth Standard full depth pressure angle 4 ' Material S4C SW- SW- SW- SW- m m Number of Lead angle Hand thread starts 4 ' 3' 4 ' 3' Heat treatment Tooth hardness (less than 4) W3 W3 W3 W3 Bore Hub dia. Pitch dia. Outside dia. Face width Hub width () Hub width (L) LH7 M N O P Q Q' 4 4 These worms produce axial thrust forces. See Page 344 for more details. W3 acks CP acks * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. B C Bronze Wheels & ray Iron Wheels B C Precision grade KHK W grade 4 KHK W grade 4 eference section of gear plane plane ear teeth Standard full depth Standard full depth pressure angle 4 ' 4 ' Material CAC(formerly JIS PBC) FC Heat treatment Tooth hardness Module B C H ear Pair earboxes B- B- B- B- C- C- C- C- C- C- C- C- C- C- C- C- C- C- C- C- eduction ratio eduction ratio m m m m No. of teeth No. of teeth Number of Helix angle Hand thread starts 4 ' 3' 4 ' 3' Number of Helix angle Hand thread starts 4 ' 3' 4 ' 3' 4 ' 4 ' 3' 4 ' 4 ' 3' 4 ' 3' 4 ' 4 ' 3' 4 ' H H H H H H H H H H H H H H H H Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width AH7 B C D D' E Wheels are profile shifted to create the proper center distance. H have elongated casting holes in the web (H). 3 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

49 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- Steel s SW Total length Set Weight Size S SW- SW- SW- SW- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. ear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel. acks B C CP acks Bronze Wheels & ray Iron Wheels * has a sand mold casting finish. Hub width Total length Mounting distance Allowable torque (N m) NOTE Backlash F J rpm rpm rpm rpm rpm rpm (mm) NOTE : Allowable torque for worm revolution (rpm) Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N m) NOTE Backlash F (H) ( I ) J rpm rpm rpm rpm (mm) (3) (3) () () () (3) () () () () () (7) (7) (7) (7) (3) (3) (7) () () (3) (7) (7) () 7 3 H NOTE : Allowable torque for worm revolution (rpm) ~..~..~.4.~ Weight ~..~..~..~..~..~..~..~..~.4.~.4.~.4.~.4.~.4 Weight C- C- C- C- C- C- C- C- C- C- C- C- C- C- C- C- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available..~.4.~.4.~.4 B- B- B- B- ear Pair earboxes 37 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

50 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SUW Stainless Steel s Module.. Precision grade KHK W grade 4 eference section of gear plane ear teeth Standard full depth pressure angle Material SUS3 Heat treatment acks CP acks SUW.- SUW.- SUW.- SUW.- D m. m. Number of Lead angle Hand thread starts 3' 3' 3 7' 34' Tooth hardness Plastic Wheels Precision grade KHK W grade eference section of gear plane ear teeth Standard full depth pressure angle Material Polyacetal Heat treatment Tooth hardness (less than 7) W W W W Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length LH M N O P Q For W-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw. These worms produce axial thrust forces. See Page 344 for more details. * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page. Module.. W ear Pair earboxes D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- eduction ratio m. m. No. of teeth Number of Helix angle Hand thread starts 3' 3' 3' 3' 3' 3' 3' 3 7' 34' 3 7' 34' 3 7' 3 7' 3 7' Bore Hub dia. Pitch dia. Throat dia. Outside dia. Face width -. A -. B C D D' E Wheels are profile shifted to create the proper center distance. The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. 3 Since the bore is finished with a minus tolerance, you can use a shaft with a force fit. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

51 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- Stainless Steel s SUW Size M3 M3 acks CP acks Set S 3 3 Weight.... SUW.- SUW.- SUW.- SUW.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. D Plastic Wheels Hub width Total length Mounting distance Allowable torque (N m) Allowable torque kgf m) Backlash F J Bending strength Bending strength (mm) ~. ~. ~. ~. ~. ~. ~..4~..4~..4~..4~..4~..4~..4~. Weight (g) ear Pair earboxes D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- D.- Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

52 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SUW Stainless Steel s Module. Precision grade KHK W grade 4 * eference section of gear plane ear teeth Standard full depth pressure angle Material SUS3 Heat treatment acks CP acks ear Pair earboxes : J Series (Available-on-request) SUW- SUW- P P- P- P- P- P- P.- P.- For W-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw. These worms produce axial thrust forces. See Page 344 for more details. Plastic Wheels eduction ratio Norma No. of teeth m Number of starts Module. Helix angle Bore Hub dia. Pitch dia. Throat dia.outside dia.mounting distance Allowable torque (N m) Allowable torque kgf m) Backlash Hand thread A B C D D' J Bending strength Bending strength (mm) 3 3' 7 ' 3 3' 3 3' 3 3' 3 ' 4' H H H H H H H Tooth hardness (less than 7) * The precision grade of J Series products is equivalent to the value shown in the table. Number of Lead angle Hand thread starts 3 3' 7 ' SUW.- SUW.-J 3 ' SUW.-J m. SUW.- SUW.-J 4' SUW.-J W W W WT WK W WT WK 3 4 Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length LH7(H) M N O P Q Precision grade KHK W grade * eference section of gear plane ear teeth Standard full depth pressure angle Material MC Nylon Heat treatment Tooth hardness Module m m. Face width (E) Hub width (F) Total length () offset (L) * The precision grade of this product is equivalent to the value shown in the table ~. ~. ~. ~. ~. ~. ~. Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while performing secondary operations and during post-machining operations. H Weight Wheels are profile shifted to create the proper center distance. Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for bore size (H when produced), teeth diameter, and backlash. Please see the section Design of Plastic in separate technical reference book (Page ). 3 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 34 for more details. W Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

53 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SUW Series Stainless Steel s W Keyway Set Weight Width Depth Size S 4 x. M M 4 x : J Series (Available-on-request) SUW- SUW- SUW.- SUW.-J SUW.-J SUW.- acks CP acks SUW.-J WT. SUW.-J Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Series WK [Caution on J series] As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 For products having a tapped hole, a set screw is included. P Plastic Wheels Newly added HT HK Bore Keyway Js size P- J BOE P- J BOE P- J BOE P- J BOE P- J BOE P.- J BOE P.- J BOE [Caution on J series] * The product shapes of J Series items are identified by background color M To order J Series products, please specify; + J + BOE As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. The use of HT shaped Set s for fastening gears to a shaft is a method only applicable to the usage for light loads. For secure fastening, please use dowel pins in combination. ear Pair earboxes * In regards to MC Nylon gears, other materials are available for plastic gears, including Ultra High Molecular Weight Polyethylene (UHMW-PE), which has excellent abrasion resistance. Poly Ether Ether Ketone (PEEK) also has quality properties. A single piece order is acceptable and will be produced as a custom-made gear. For details on quotations and orders please see Page. 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

54 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- SUW Stainless Steel s Module. 3 Precision grade eference section of gear ear teeth Material Heat treatment KHK W grade 4 * plane Standard full depth SUS3 acks CP acks ear Pair earboxes P Number of starts Lead angle Hand thread Tooth hardness (less than 7) Module m m. m3 pressure angle 4 ' 4 ' offset (S) 7 Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length Weight LH7 M N O P Q SUW- 3 4' m SUW- 7 ' SUW.- 3 ' m. W SUW.- 7 4' SUW3-3 ' m3 SUW3-7 ' P- P- P.- P.- P3- P3- These worms produce axial thrust forces. See Page 344 for more details. Plastic Wheels eduction ratio No. of teeth Number of starts * The precision grade of J Series products is equivalent to the value shown in the table. * The pressure angle is at degrees for.. Module. 3 Helix angle Bore Hub dia. Pitch dia. Throat dia.outside dia.mounting distance Allowable torque (N m) Allowable torque kgf m) Backlash Hand thread A B C D D' J Bending strength Bending strength (mm) 3 4' 7 ' 3 ' 7 4' 3 ' 7 ' H Precision grade KHK W grade * eference section of gear plane ear teeth Standard full depth Material MC Nylon Heat treatment Tooth hardness Module m m. m3 pressure angle 4 4 Face width (E) Hub width (F) 3 4 Total length () offset (L) * The precision grade of this product is equivalent to the value shown in the table (.4) (.4) (3.7) (3.) Wheels are profile shifted to create the proper center distance. Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for bore size (H when produced), teeth diameter, and backlash. Please see the section Design of Plastic in separate technical reference book (Page ). 3 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Usage above the value in brackets will exceed the maximum allowable sliding speed, if no lubrication is applied. So, lubrication is required. Please see Page 34 for more details H Weight ~..4 ~.3. ~.3.3 W 3 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

55 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- Series SUW Stainless Steel s Newly added To order J Series products, please specify; + J + BOE Bore H7 Keyway Js size SUW- BOE SUW- BOE SUW.- BOE SUW.- BOE SUW3- BOE SUW3- BOE Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Series WK * The product shapes of J Series items are identified by background color M [Caution on J series] As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 For products having a tapped hole, a set screw is included. P Plastic Wheels Newly added acks CP acks To order J Series products, please specify; + J + BOE Bore Keyway Js size P- J BOE P- J BOE P.- JBOE P.- JBOE P3- J BOE P3- J BOE HK * The product shapes of J Series items are identified by background color M M Please read Caution on Performing Secondary Operations (Page 344) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while performing secondary operations and during post-machining operations. ear Pair earboxes [Caution on J series] As available-on-request products, requires a lead-time for shipping within working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. Number of products we can process for one order is to units. For quantities of or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B standards, Js tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. For products having a tapped hole, a set screw is included. Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-

56 Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA- KHK Topics We welcome your requests for Custom ood Points! Best ever quality in a KHK Stock ack series! Carburized round acks are available! For details see our web site. 34 For details, see page. Order from MAYLAND METI P.O. Box Owings Mills, MD 7 USA web: sales@mdmetric.com ph: ()3-3 ()3- fx: ()3-34 ()7-3 rfq form: How to order: Please preface each KHK part number with 'K-' Example (using the part number): K-MSA-