Bevel Gears. Catalog Number of KHK Stock Gears. Bevel Gears M BS G R. Gears. Spur. Helical. Gears. Internal. Gears. Racks. CP Racks.

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1 MHP High-atio Hypoid MBS round Spiral SBS round Spiral ear atio ~ 0 ear atio 2 ear atio 1.5 ~ 3 m1, 1.5 Page 6 ~ 4 Page 8 ~ 4 Page 4 MBSA MBSB Finished Bore Spiral ear atio 1.5 ~ 3 SBS Spiral ear atio 1.5 ~ 4 SBZ round Zerol ear atio 1.5, 2 ~ 6 Page 462 m1 ~ 5 Page 466 New ~ 3 Page 470 SB Steel ear atio 1.5 ~ 4 SBY Steel ear atio 2 ~ 4 SB Steel & Pinion Shafts ear atio 5 acks m1.5 ~ 6 Page 472 SUB Stainless Steel ear atio 1.5 ~ 3 m5 ~ 8 Page 472 PB Plastic ear atio 1.5 ~ 3 m1.5 ~ 3 Page 476 DB Injection Molded ear atio 2 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 their Catalog Numbers. (Example) M BS 2 - CP acks m1.5 ~ 3 Page 478 BB Sintered Metal Bushings φ5 ~ 8 Page 482 m1 ~ 3 Page 4 Nissei KSP round Spiral ear atio 1.5 ~ 2 ~ 5 Page 488 m0.5 ~ 1 Page 482 KHK products are available from MAYAND METICS P.O. Box 261 Owings Mills, MD 211 USA ph: (4)8-31 (0)638- fx: (4) (0) sales@mdmetric.com FQ form: Feature Icons ohs Compliant Product e-machinable Product Direction of Spiral ( ) No. of teeth of mating gear () No. of teeth () Module (2) s (round ear) Type (Spiral ear) Material (SCM4) Material Type S SC B Straight M SCM4 BS Spiral SU SUS3 HP High atio Hypoid P MC1 D DUACON Information round Stainless Product esin Product Finished Product Heat Treated Product round ear Copper Alloy Product Injection Molded Product Black Oxide coated Product 449

2 Characteristics KHK stock bevel gears are available in two types, spiral and straight tooth, in gear ratios of 1.5 through 5, and are offered in a large variety of modules, numbers of teeth, materials and styles. The following table lists the main features for easy selection. Type Hypoid ear Spiral bevel gears Zerol Straight bevel gears Module ear atio Material MHP 1 ~ 1.5 ~ 0 SCM4 MBS 2 ~ 4 2 SCM4 SBS 2 ~ ~ 3 SC NOTE 1 Although these are carburized products, secondary operations can be performed as the bore and the hub portions are masked during the carburization. However, as a precaution, high hardness (HC at maximum) occurs in some cases. For safe handling and to prevent damage such as deformation, KHK stock bevel gears have round chamfering at the corners, on the top surface plane of a gear tooth. Heat Treatment Carburized Note 1 Carburized Note 1 ear teeth induction hardened Integrated combination of cutting-edge technologies and know-how. The popularity in our large selection of product lineups is established by a production system integrated with advanced manufacturing technology and know-how, achieving quality products. Tooth Surface Finish Precision JIS B 04 Secondary Operations Cut 3 round 2 round 2 MBSA MBSB 2 ~ ~ 3 SCM4 Carburized Cut 4 SBS 1 ~ ~ 4 SC SBZ 2 ~ ~ 2 SC ear teeth induction hardened ear teeth induction hardened Cut 4 round 2 SB SBY 1 ~ ~ 5 SC Cut 3 SUB 1.5 ~ ~ 3 SUS3 Cut 3 PB 1 ~ ~ 3 MC1 Cut 4 DB 0.5 ~ 1 2 Duracon (M-44) Injection Molded 8 Features High speed reduction ratio, high efficiency, high rigidity and compact gear assembly. High strength, abrasion-resistant and compact for high-speed & torque use. easonably priced ground gear, yet remachinable except for the gear teeth. eady to use without performing secondary operations. Strong and abrasion resistant. arge nos. of teeth and modules are offered in these affordable spiral bevel gears. A spiral bevel gears with a helix angle less than. eceives forces from the same direction as straight bevel gears receive and have excellent precision properties. Popular series of straight bevel gears for many uses. Suitable for food machinery due to SUS3's rust-resistant quality. MC nylon products are light and can be used without lubricant. Injection molded, mass-produced productions, suitable for office machines. Possible Partly possible Not possible The chamfering of the corner gear tips for bevel gear Module Outside edge Inside edge 0.5 up to All burrs removed 1 up to up to Over ear cutting of Straight ear rinding Machine (leason PH-2H) ear cutting of Spiral ear Cutting Machine Equipments Inspection Equipment 0

3 KHK Technical Information 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. 1. Caution in Selecting the Mating Basically, KHK stock bevel gears should be selected as shown in the catalog in pairs (e.g. MBS2- should mate with MBS2-). But, for straight tooth bevel gears, there is some interchangeability with different series. For plastic bevel gears, we recommend metal mating gears for good heat conductivity. Selection Chart for Straight ( Allowable Not allowable) ear Pinion SB SUB PB DB SB SUB PB DB ight () eft () Selection Chart for Spiral ( Allowable Not allowable) ear MBS SBS MBSA Pinion MBSB SBS MBS SBS MBSA MBSB SBS 2. Caution in Selecting Based on ear Strength The gear strength values shown in the product pages were computed by assuming a certain application environment. Therefore, they should be used as reference only. We recommend that each user computes their own values by applying the actual usage conditions. To learn more about strength calculation, please refer to the technical information contained in the Bending Strength of section on page 679, and the Surface Durability of section on page 685. Calculation assumptions for Bending Strength of Item MBS MBSA MBSB SBS SBZ SBS SB NOTE 3 SBY SUB PB DB Formula NOTE 1 Formula of bevel gears on bending strength(jma3-01) The ewis formula No. of teeth of mating gear No. of teeth of the mating gear of the set --- otation 0rpm(0rpm for MBS, SBS and SBZ) 0rpm Durability Over 7 cycles --- Impact from motor Uniform load Allowable bending stress(kgf/mm 2 ) Impact from load Uniform load Direction of load Bidirectional Allowable bending stress at root σ Flim (kgf/mm 2 ) NOTE (.5).5 Safety factor K ( with No ubrication) m m m ( with rease ubrication) Calculation assumptions for Surface Durability (Except those in common with bending strength) Formula NOTE 1 Kinematic viscosity of lubricant ear support Formula of bevel gears on surface durability(jma4-01) 0cSt( ) Shafts & gear box have normal stiffness, and gears are supported on one end Allowable Hertz stress σ Hlim (kgf/mm 2 ) 6 49(62.5) 41.3 Safety factor C 1. NOTE 1 The gear strength formula is based on JMA (Japanese ear Manufacturers Association) specifications. MC Nylon Technical Data by Nippon Polypenco imited and Duracon ear Data by Polyplastic Co. Also, the units (rpm) of number of rotations and unit (kgf/mm 2 ) of stress are adjusted to the units needed in the formula. NOTE 2 Since the load is bidirectional, the allowable bending stress at root σ Hlim, used in JMA 3-01 formula is set to 2/3 of the value. NOTE 3 Since SB Pinion Shafts are thermally refined, the allowable tooth-root bending stress and allowable hertz stress are referred to the value shown in parentheses. 1

4 Application Hints In order to use KHK stock gears safely, carefully read the Application Hints before proceeding. If there are questions or you require clarifications, please our technical department or your nearest distributor. KHK Co., td. TE FAX Caution on Performing Secondary Operations 1 If you are reboring, it is important to pay special attention to locating the center in order to avoid runout. 2 The reference datum for gear cutting is the bore. Therefore, it is best to use the bore 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. 3 If reworking using scroll chucks, we recommend the use of new or rebored jaws for improved precision. Please exercise caution not to crush the teeth by applying too much pressure. Any scarring will cause noise during operation. 8For the handling conveniences, SB and SBY series listed below has the tapped holes (0 o apart, 2 places) on the holding surface. (mm) Tap Size SB6-1 M deep SBY8-1 M deep SBY8-2 M deep SBY5-1 M deep SBY6-2 M deep 2. Points of Caution in Assembling 1 Since bevel gears are cone shaped, they produce axial thrust forces. Especially for spiral bevel gears, the directions of thrust change with the hand of spiral and the direction of rotation. This is illustrated below. The bearings must be selected properly to be able to handle these thrust forces. For details, please refer to the technical reference, section of ear Forces (Page 700). Direction of rotation and thrust force Thrust Drive Thrust 2 athe operations 4 For items with induction hardened teeth, such as SBS and SBS series, the hardness is high near the tooth root. When machining the front end, the machined area should be 4 to 6mm smaller than the dimension, J. 5 For tapping and keyway operations, see the examples given in 1. Caution on Performing Secondary Operations in KHK Stock ear section. When cutting keyways, to avoid stress concentration, always leave radii on corners. 6 PB plastic bevel gears are susceptible to changes due to temperature and humidity. Dimensions may change between during and after remachining operations. 7 When heat treating SC products, it is possible to get thermal stress cracks. It is best to subject them to penetrant inspection afterwards. While the teeth strength may increase four fold, the precision of the gear will drop approximately one grade. Thrust Thrust Thrust Drive Thrust Thrust Thrust [NOTE] gears with the gear ratio 1.57 or less, produce a thrust force which has the same direction as miter gears. For details, see page 4. 2 If a bevel gear is mounted on a shaft far from the bearings, the shaft may bend. We recommend mounting bevel gears as close to the bearings as possible. This is especially important since most bevel gears are supported on one end. The bending of shafts will cause abnormal noise and wear, and may even cause fatigue failure of the shafts. Both shafts and bearings must be designed with sufficient strength. 3 Due to the thrust load of bevel gears, the gears, shafts and bearings have the tendency to loosen up during operation. gears should be fastened to the shaft with keys and set screws, taper pins, step shafts, etc. 4 When installing MBSA or MBSB spiral bevel gears in B7 style (ring type), Taper pin always secure the gears onto the mounting base with taper ear pins to absorb the rotational loads. It is Mounting base dangerous to secure with bolts only.

5 KHK Technical Information 5 KHK stock bevel gears are designed such that, when assembled according to the specified mounting distance with a tolerance of H7 - H8, the backlash shown in the table is obtained. Mounting distance error, offset error and shaft angle error must be minimized to avoid excessive noise and wear. For various conditions of teeth, please see the following illustrations, "Correct Tooth Contact" and "Incorrect Tooth Contact". Correct Tooth Contact When assembled correctly, the will occur on both gears in the middle of the flank and center of face width but somewhat closer to the toe. Center closer to toes Mounting Distance Error When the mounting distance of the pinion is incorrect, the will occur too high on the flank on one gear and too low on the other. ow High Error Incorrect Tooth Contact Offset Error When the pinion shaft is offset, the surface is near the toe of one gear and near the heel of the other. Heel Error Shaft Angle Error When there is an angular error of shafts, the gears will at the toes or heels depending on whether the angle is greater or less than. Error Toe Toe High ow Error Toe Error Heel Error Heel Application Examples SB are used in the automatic line-feeding of a machine part processing machine. 2WD Bicycle by SHESCO SB are used in the driving components in both the front and rear wheels. 3

6 MHP High-atio Hypoid Features of MHP High atio Hypoid acks CP acks A pair of MHP high-ratio hypoid gears are able to produce an amazing reduction of speed of 0:1 in one stage. 1. Total-cost reduction The MHP provides a compact gearing body replacing several stages of reduction gears. This reduces the cost sharply. 2. High efficiency Compared to worm gear drives, the MHP has less sliding. The resulting MHP higher efficiency allows the use of smaller motors (See the graph on the right). 3. High rigidity The carburized hypoid gears lead to smaller size than comparable worms gears. 4. Compact gear assembly The size of the gear housing is nearly the same as outer diameter of the large gear. (See the diagrams below) Efficiency Comparison of the efficiency of MHP High atio Hypoid ear and ear ear How to determine the radial and thrust loads Comparison of MHP and ear ear Position eduction Before using the MHP high-ratio hypoid gears, be sure to confirm the direction of radial and thrust loads. Following equations are used to compute these loads. The radial and thrust load coefficients are given on the product pages. adial load calculation WP :adial load on the pinion or (N) Strength Efficiency + Heat Treated Miniaturization of Main Body educed Motor Capacity ex,w aw Material + Induction Hardened WP = WKP T WKP :adial load coefficient of pinion or (given on the product pages) T :Torque of gear or (N.m) n :Number of teeth of pinion or z :Number of teeth of gear or W :adial load on the gear or (N) W = WK T WK :adial load coefficient of gear or (given on the product pages) T :Torque of gear or (N.m) Thrust load calculation n z ex,w WXP :Thrust load on the pinion or (N) n WXP = WNP T z WNP :Thrust load coefficient of pinion or (given on the product page) T :Torque of gear or (N.m) n :Number of teeth of pinion or z :Number of teeth of gear or WX :Thrust load of gear or (N) WX = WN T WN :Thrust load coefficient of gear or (given on the product pages) T :Torque of gear or (N.m) 4

7 MHP High-atio Hypoid Variations in tooth due to poor alignment of gears If the gear engagement position is out of the normal position, variations in tooth, as illustrated below, may appear. (1) Tooth in case of a shaft-angle error (2) Tooth in case of a shaft-offset error Toe Toe Toe Toe Error High toe ow toe High heel ow heel Error (Offset is large) acks Heel Heel Heel Error High toe ow toe Error (Offset is small) CP acks Heel ow heel High heel (3) Tooth in case of a pinion set position error (4) Tooth in case of a gear set position error High toe ow heel Error Toe Toe ow toe High heel Heel Heel Error ow toe High toe ow heel Error Toe Heel Heel Error Toe High heel Inquiries are now being accepted on our website. 5

8 MHP High-atio Hypoid Module Specifications Precision grade JIS B 04 grade 3 ear teeth leason Pressure angle Material SCM4 Heat treatment Carburizing CW CCW Tooth hardness ~ 63HC acks CP acks MHP1-03 MHP1- MHP MHP1.5- MHP1-03 MHP1- MHP MHP1.5- MHP1-02 MHP1- MHP MHP1.5- MHP1-01 MHP1- MHP MHP1.5- MHP1-01 MHP1- MHP MHP1.5- MHP1-01 MHP1- MHP1-11 MHP1-11 MHP1-01 MHP1- MHP1-01 MHP1- [Caution on Product Characteristics] eduction ratio Nominal module Actual module m m m m m m m m m m m m m1 1 0 m1 1 No. of teeth Direction of spiral Shape Bore Shaft Dia. Hub dia. Pitch dia. Outside dia. Mounting distance Total length Hub width ength of bore and shaft A (Bore: H7 Shaft: h7) B C D E F H I The allowable torques are obtained from the results of experimentation with the pinion at 0 rpm, lubricated with Kingstar S-O (NIHON EASE). 2 adial and thrust load coefficients are the factors used for calculation of those loads. As shown in the figure Shape, CW and CCW stand for clockwise and counterclockwise rotation. A plus sign means that the two gears in a set move away each other when load is applied. A minus sign means that two gears in a set approach each other when load is applied. For more details, see the section How to determine the radial and thrust loads on page 4. Helix Hands and Offset Position MHP High atio Hypoid are designed to be right hand helix for gears, left hand helix for pinions. The opposite helix hand gears are not available for these products. Also, the offset position is already set, so please refer to the illustration bellow when designing or assembling. 6

9 MHP High-atio Hypoid acks CP acks Face width Holding surface dia. Offset adial load coefficient Thrust load coefficient Allowable torque (J) K CW CCW CW CCW (6) () (8) () (8) () (6) () (8) () () () () () [Caution on Secondary Operations] (N m) Allowable torque (kgf m) Backlash (mm) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~0. Weight (kg) MHP1-03 MHP1- MHP MHP1.5- MHP1-03 MHP1- MHP MHP1.5- MHP1-02 MHP1- MHP MHP1.5- MHP1-01 MHP1- MHP MHP1.5- MHP1-01 MHP1- MHP MHP1.5- MHP1-01 MHP1- MHP1-11 MHP1-11 MHP1-01 MHP1- MHP1-01 MHP1-1Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. 2 In the illustration, the area surrounded with line is masked during the carburization process and can be modified. However, care should be exercised since the hardness is high (approx. HC, maximum). Inquiries are now being accepted on our website. 7

10 MBS round Spiral Module acks CP acks ear ratio Module MBS2- MBS2- MBS2.5- MBS2.5- MBS3- MBS3- MBS4- MBS4- [Caution on Product Characteristics] 2 m4 No. of teeth Specifications Precision grade JIS B 04 grade 2 ear teeth Pressure angle Helix angle Material Heat treatment Tooth hardness Direction of spiral leason SCM4 Carburizing ~ HC Shape Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length AH7 B C D E F Allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 These gears produce axial thrust forces. Please see page 2 for more details. Contact Surface of Spiral Tooth surfaces of spiral gears have concave and convex sides. Changes in the rotational direction of the driving gear alter the surface accordingly. The illustrations show the top view of H and H Spiral, and the tables on the right explain the different surface depending on the situation. Tooth H spiral Concave surface Convex surface H spiral Tooth H Spiral as a driving gear otating Direction of Driving ear Note 1 H otation (Clockwise) H rotation (counterclockwise) otating Direction of Driving ear Note 1 H otation (Clockwise) Driving ear (H Spiral) Convex Surface Concave Surface H Spiral as a driving gear Driving ear (H Spiral) Concave Surface Contact Surface Contact Surface Driving ear (H Spiral) Concave Surface Convex Surface Driving ear (H Spiral) Convex Surface H otation (Counterclockwise) Convex Surface Concave Surface Note 1 otation directions given in the tables are for viewing the gears from the hub side. 8

11 round Spiral MBS Hub width ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash H I J K Bending strength Surface durability Bending strength Surface durability [Caution on Secondary Operations] (mm) 0.05~ ~ ~ ~0. Weight (kg) MBS2- MBS2- MBS2.5- MBS2.5- MBS3- MBS3- MBS4- MBS4-1Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. 2 In the illustration, the area surrounded with line is masked during the carburization process and can be modified. However, care should be exercised since the hardness is high (approx. HC, maximum). acks CP acks Forces Acting on Spiral ear Teeth For a spiral bevel gear with shaft angle Σ=, pressure angle αn=, and spiral angle βm=, the tables below show the axial thrust force Fx and the radial force Fr when a tangential force Ft of 0 units is applied at the center of face width. For details, please refer to the section Features of Tooth Surface Contact in the technical reference. The tables show the values of (1)Forces acting upon pinion Contact Surface ear atio z 2/z 1 Axial Thrust Force Fx adial Force Fr (2)Forces acting upon gear Contact Surface ear atio z 2/z Concave Surface Concave Surface Convex Surface Convex Surface Inquiries are now being accepted on our website. 9

12 SBS round Spiral Module acks CP acks ear ratio Module SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- [Caution on Product Characteristics] m4 m4 No. of teeth Specifications Precision grade JIS B 04 grade 2 ear teeth Pressure angle Helix angle Material leason SC Heat treatment Teeth induction hardened Tooth hardness ~ HC Direction of spiral Shape Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length AH7 B C D E F Allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 These gears produce axial thrust forces. Please see page 2 for more details. 4

13 round Spiral acks SBS CP acks Hub width ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash H I J K Bending strength Surface durability Bending strength Surface durability [Caution on Secondary Operations] (mm) 0.05~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~0.13 Weight (kg) SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3-1Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. 2 Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). Inquiries are now being accepted on our website. 461

14 MBSA MBSB Finished Bore Spiral Module 2 ~ 6 acks CP acks ear ratio Module No. of Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width ength of bore Shape teeth of spiral AH7 B C D E F H I MBSA2- MBSB MBSA2- BK MBSB MBSA2.5- MBSB MBSA2.5- BK MBSB MBSA3- MBS MBSA3- MBS- 1.5 BK MBSA4- m4 MBS MBSA4- m4 BK MBS MBSA5- m5 B MBSA5- m5 BK MBSB MBSA6- m6 B MBSA6- m6 BK MBSB MBSA2- MBSB MBSA2- BK MBSB MBSA2.5- MBSB MBSA2.5- BK MBSB MBSA3- MBS MBSA3-2 BK MBS MBSA4- m4 B MBSA4- m4 BK MBS MBSA5- m5 B MBSA5- m5 BK MBSB MBSA6- m6 B MBSA6- m6 BK MBSB [Caution on Product Characteristics] Specifications Precision grade JIS B 04 grade 4 ear teeth Pressure angle Helix angle Material leason SCM4 Heat treatment Overall carburizing Tooth hardness ~ HC 1 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 These gears produce axial thrust forces. See page 2 for more details. 4 Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the effects of heat treatment. 5 For products having a tapped hole (Except for B7-shaped products), a tapping screw is attached as an accessory. BK 462

15 MBSA MBSB Finished Bore Spiral Face width Holding surface dia. Keyway Set Allowable torque (N m) Allowable torque (kgf m) Backlash J K Width Depth Size Bending strength Surface durability Bending strength Surface durability x 2.8 M6 6 x 2.8 M x 2.3 M5 6 x 2.8 M x 2.8 M6 8 x 3.3 M x 2.8 M6 6 x 2.8 M x 3.3 M8 8 x 3.3 M x 2.8 M6 8 x 3.3 M x 3.3 M8 x 3.3 M x 3.3 M8 x 3.3 M M x 3.3 M8 x 3.3 M M x 3.8 M8 14 x 3.8 M x 2.8 M6 6 x 2.8 M x 2.3 M5 6 x 2.8 M x 3.3 M8 8 x 3.3 M x 2.8 M6 6 x 2.8 M x 3.3 M8 x 3.3 M x 2.8 M6 8 x 3.3 M M x 3.3 M8 x 3.3 M M x 3.3 M8 14 x 3.8 M M x 3.8 M8 x 4.3 M [Caution on Secondary Operations] B7 (mm) 0.06~ ~ ~0. 0.~ ~ ~ ~ ~ ~0. 0.~ ~ ~0.36 Weight (kg) MBSA2- MBSB2- MBSA2- MBSB MBSA MBSB MBSA MBSB MBSA3-0. MBS MBSA MBS MBSA MBS MBSA MBS- 2. MBSA MBSA MBSB5-4. MBSA MBSA MBSB MBSA MBSB2-0. MBSA MBSB MBSA MBSB MBSA MBSB MBSA3-1. MBS MBSA MBS MBSA MBSA MBS MBSA MBSA MBSB MBSA MBSA MBSB6-1 These products which are hardened by carburizing allow no secondary machining. However, for B7 type gear, the area surrounded with line (in the illustration) is masked during the carburization process and can be modified. Care should be exercised since the hardness is high (approx. HC, maximum). acks CP acks When installing B7 type (ring type) Spiral to the base, always secure the gears onto the mounting base with taper pins to absorb the rotational loads. Fastening and securing with only mounting screws could possibly cause the screws to snap due to heavy loads. ear Mounting base Taper pin Inquiries are now being accepted on our website. 463

16 MBSA MBSB Finished Bore Spiral Module 2 ~ 6 acks CP acks Specifications Precision grade JIS B 04 grade 4 ear teeth Pressure angle Helix angle Material leason SCM4 Heat treatment Overall carburizing Tooth hardness ~ HC ear ratio Module No. of Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width ength of bore Shape teeth of spiral AH7 B C D E F H I MBSA2- MBSB MBSA2- BK MBSB MBSA2.5- MBSB MBSA2.5- BK MBSB MBSA3- MBS MBSA3-2.5 BK MBS MBSA4- m4 B MBSA4- m4 BK MBS MBSA5- m5 B MBSA5- m5 BK MBSB MBSA6- m6 B MBSA6- m6 BK MBSB MBSA2- MBSB MBSA2- BT MBSB2- BK MBSA2.5- MBSB MBSA2.5- BK MBSB MBSA3- MBS MBSA3-3 BK MBS MBSA4- m4 B MBSA4- m4 BK MBS MBSA5- m5 B MBSA5- m5 BK MBSB MBSA6- m6 B MBSA6- m6 BK MBSB [Caution on Product Characteristics] 1 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 These gears produce axial thrust forces. See page 2 for more details. 4 Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the effects of heat treatment. 5 For products having a tapped hole (Except for B7-shaped products), a tapping screw is attached as an accessory. BK 464

17 MBSA MBSB Finished Bore Spiral BT Face width Holding surface dia. Keyway Set Allowable torque (N m) Allowable torque (kgf m) Backlash J K Width Depth Size Bending strength Surface durability Bending strength Surface durability 6 x 2.8 M x 3.3 M8 4 x 1.8 M x 2.3 M5 8 x 3.3 M x 3.3 M8 5 x 2.3 M x 2.8 M6 8 x 3.3 M x 3.3 M8 6 x 2.8 M x 3.3 M M x 3.3 M x 3.3 M M x 3.3 M x 3.3 M M x 3.8 M x 3.8 M8 6 x 2.8 M x 2.8 M6 M x 1.8 M M M M x x x x x x 3.3 x 3.3 M6 M5 M8 M6 M6 M8 M8 8 x x 2.3 x x x 3.3 x 3.3 x 3.3 M8 M5 M8 M6 M8 M8 M8 [Caution on Secondary Operations] (mm) 0.06~ ~ ~0. 0.~ ~ ~ ~ ~ ~0. 0.~ ~ ~0.36 Weight (kg) B MBSA2- MBSB2- MBSA2- MBSB MBSA MBSB MBSA MBSB MBSA MBS MBSA MBS MBSA MBSA MBS MBSA MBSA5-1. MBSB MBSA MBSA MBSB MBSA2-0. MBSB MBSA MBSB MBSA MBSB MBSA MBSB MBSA3-1. MBS MBSA3-0. MBS MBSA MBSA MBS MBSA5-1. MBSA MBSB5-.0 MBSA6-1. MBSA6-1. MBSB6-1 These products which are hardened by carburizing allow no secondary machining. However, for B7 type gear, the area surrounded with line (in the illustration) is masked during the carburization. process and can be modified. Care should be exercised since the hardness is high (approx. HC, maximum). acks CP acks When installing B7 type (ring type) Spiral to the base, always secure the gears onto the mounting base with taper pins to absorb the rotational loads. Fastening and securing with only mounting screws could possibly cause the screws to snap due to heavy loads. ear Mounting base Taper pin Inquiries are now being accepted on our website. 465

18 SBS Spiral Module 1 ~ 5 acks CP acks Specifications Precision grade JIS B 04 grade 4 ear teeth Pressure angle Helix angle Material ear ratio Module No. of teeth SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5- SBS1- SBS1- SBS1.5- SBS1.5- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5- SBS SBS SBS3-36 SBS3-36 SBS4-36 SBS4-36 SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5- [Caution on Product Characteristics] m4 m5 m1 m1.5 m4 m5 m4 m4 m Heat treatment Tooth hardness Direction of spiral leason SC Teeth induction hardened ~ HC Shape B5 Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length A B C D E F The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 These gears produce axial thrust forces. See page 2 for more details. 4 Due to heat treating, some deformation of the bore may occur. It may be necessary to ream the bore to bring it to the stated dimensions

19 Spiral FD SBS FD Hub width ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash H I J K Bending strength Surface durability Bending strength Surface durability [Caution on Secondary Operations] * FD has die-forged finish (mm) 0.06~ ~ ~0. 0.~ ~ ~ ~ ~ ~ ~0. 0.~ ~ ~ ~0. 0.~ ~ ~ ~0. 0.~ ~0.34 B5 Weight (kg) SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5- SBS1- SBS1- SBS1.5- SBS1.5- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5- SBS SBS SBS3-36 SBS3-36 SBS4-36 SBS4-36 SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5-1 Please read Caution on Performing Secondary Operations (Page 2) when performing modification and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. 2 Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). acks CP acks Inquiries are now being accepted on our website. 467

20 SBS Spiral Module 1.5 ~ 5 acks CP acks Specifications Precision grade JIS B 04 grade 4 ear teeth Pressure angle Helix angle Material ear ratio Module No. of teeth SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5- SBS1.5- SBS1.5- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- [Caution on Product Characteristics] 3 4 m4 m5 m1.5 Heat treatment Tooth hardness Direction of spiral leason SC Teeth induction hardened ~ HC Shape B5 B5 Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length A B C D E F The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 These gears produce axial thrust forces. See page 2 for more details. 4 Due to heat treating, some deformation of the bore may occur. It may be necessary to ream the bore to bring it to the stated dimensions

21 Spiral FD acks CP acks SBS FD Hub width ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash H I J K Bending strength Surface durability Bending strength Surface durability [Caution on Secondary Operations] * FD has die-forged finish (mm) 0.06~ ~ ~0. 0.~ ~ ~ ~ ~ ~0. B5 Weight (kg) SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3- SBS4- SBS4- SBS5- SBS5- SBS1.5- SBS1.5- SBS2- SBS2- SBS2.5- SBS2.5- SBS3- SBS3-1Please read Caution on Performing Secondary Operations (Page 2) when performing modification and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. 2 Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). Inquiries are now being accepted on our website. 469

22 SBZ round Zerol Module 2 ~ 3 Specifications Precision grade JIS B 04 grade 2 ear teeth leason Pressure angle Material Heat treatment SC Teeth induction hardened Tooth hardness ~ HC acks CP acks New items indicated in blue letters SBZ2- SBZ2- SBZ2.5- SBZ2.5- SBZ3- SBZ3- SBZ2- SBZ2- SBZ2.5- SBZ2.5- SBZ3- SBZ3- [Caution on Product Characteristics] ear ratio Module No. of teeth Helix angle Direction of spiral Shape Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length A B C D E F Allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 It produces an axial thrust force, which has the same direction as straight bevel gears. For details, see page 700. Performance Comparison ear Type Bearing Design * Interchangeability SM2- round Zerol Mounting Distance Precision JIS B 04 Strength Bending Strength Durability Surface Durability Noise/Vibration Surface oughness/total Contact atio No thrust force produced inward SUB PB SBZ grade 3.2N m /.2N m 2.92N m /1.46N m 3.2a/1.63 Price for single item SMZ2-/ round Spiral No thrust force produced inward SB SUB PB grade N m /13.1N m.4n m /9.N m 0.4a/1.84 MMS2-/ Thrust force produced inward ー grade N m /.9N m 87.2N m /43.6N m 0.4a/

23 SBZ round Zerol New Prodects acks CP acks Hub width ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash H I J K Bending strength Surface durability Bending strength Surface durability [Caution on Secondary Operations] (mm) 0.05~ ~ ~ ~ ~ ~0.13 Weight (kg) New items indicated in blue letters SBZ2- SBZ2- SBZ2.5- SBZ2.5- SBZ3- SBZ3- SBZ2- SBZ2- SBZ2.5- SBZ2.5- SBZ3- SBZ3-1 Please read Cautions on Performing Secondary Operations (Page 2) when performing modification and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. 2 Due to gear teeth induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1to 2 mm). Inquiries are now being accepted on our website. 471

24 SB SBY Steel Module 1.5 ~ 6 Specifications Precision grade JIS B 04 grade 3 ear teeth leason Pressure angle Material Heat treatment SC Tooth hardness less than 194HB acks CP acks 472 ear ratio Module SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB6- SB6- SB SB S-36 S-36 S-36 S-36 SB1- SB1- SB1.- SB1.- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB6- SB6- SBY8- SBY8- [Caution on Product Characteristics] m1.5 m4 m5 m1.5 m4 m5 m6 m4 m1 m1. m1.5 m4 m5 m6 m8 No. of teeth Shape B5 B5 B5 B5 BT Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width AH7 B C D E F H The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 For convenience in handling, BT Shaped have tapped holes on their holding surface. To find the dimensions and tap sizes, please refer to page 2.

25 Steel ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash I J K Bending strength Surface durability Bending strength Surface durability SB SBY FD FD * FD has die-forged finish. B5 (mm) Weight (kg) 0.05~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB6- SB6- SB SB S-36 S-36 S-36 S-36 SB1- SB1- SB1.- SB1.- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB6- SB6- SBY8- SBY8- BT acks CP acks [Caution on Secondary Operations] 1 Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. Inquiries are now being accepted on our website. 473

26 SB SBY Steel Module 1 ~ 8 Specifications Precision grade JIS B 04 grade 3 ear teeth leason Pressure angle Material Heat treatment SC Tooth hardness less than 194HB acks CP acks ear ratio Module SB1- SB1- SB1.- SB1.- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB1- SB1- SB1.- SB1.- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB6- SB6- SBY8- SBY8- [Caution on Product Characteristics] m1 m1. m1.5 m4 m5 m1 m1. m1.5 m4 m5 m6 m8 No. of teeth Shape B5 B5 BT BT Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width AH7 B C D E F H The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 For convenience in handling, BT Shaped have tapped holes on their holding surface. To find the dimensions and tap sizes, please refer to page

27 Steel acks CP acks SB SBY FD ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash I J K Bending strength Surface durability Bending strength Surface durability [Caution on Secondary Operations] FD * FD has die-forged finish. B5 (mm) Weight (kg) 0.03~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ SB1- SB1- SB1.- SB1.- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB1- SB1- SB1.- SB1.- SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SB5- SB5- SB6- SB6- SBY8- SBY8-1 Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. BT Inquiries are now being accepted on our website. 4

28 SB SBY Steel Module 1.5 ~ 6 Specifications Precision grade JIS B 04 grade 3 ear teeth leason Pressure angle Material Heat treatment SC Tooth hardness less than 194HB acks CP acks ear ratio Module SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SBY5- SBY5- SBY6- SBY6- [Caution on Product Characteristics] 4 m1.5 m4 m5 m6 No. of teeth Shape B5 BT BT Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width AH7 B C D E F H The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 3 For convenience in handling, BT Shaped have tapped holes on their holding surface. To find the dimensions and tap sizes, please refer to page 2. SB Steel & Pinion Shafts Module 1.5 ~ 3 Specifications Precision grade JIS B 04 grade 3 ear teeth leason Pressure angle ear ratio Module SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- [Caution on Product Characteristics] 5 m1.5 No. of teeth Material Heat treatment SC * Tooth hardness less than 194HB * * Pinions are thermal refined. The hardness of a gear tooth is 5 to 2HB. Bore Shaft dia. Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width ength of bore shaft Shape B C D E F H I The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips

29 Steel FD ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash I J K Bending strength Surface durability Bending strength Surface durability FD B5 (mm) 0.05~ ~ ~ ~0. 0.~ ~ ~0.36 Weight (kg) SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- S- S- SBY5- SBY5- SBY6- SBY6- BT acks CP acks Steel & Pinion Shafts SB SBY [Caution on Secondary Operations] * FD has die-forged finish. 1 Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. SB Face width Holding surface dia. Shaft length Allowable torque (N m) Allowable torque (kgf m) Backlash size J K M Bending strength Surface durability Bending strength Surface durability (mm) [Caution on Secondary Operations] M5 M6 M8 M ~ ~ ~ ~0. Weight (kg) SB1.5- SB1.5- SB2- SB2- SB2.5- SB2.5- S- S- 1 Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. Inquiries are now being accepted on our website. 477

30 SUB Stainless Steel Module Specifications Precision grade JIS B 04 grade 3 ear teeth leason Pressure angle Material SUS3 Heat treatment Tooth hardness less than 7HB acks CP acks ear ratio Module SUB1.5- SUB1.5- SUB2- SUB2- SUB2.5- SUB2.5- SU- SU- SUB1.5- SUB1.5- SUB2- SUB2- SUB2.5- SUB2.5- SU- SU- SUB1.5- SUB1.5- SUB2- SUB2- SUB2.5- SUB2.5- SU- SU m1.5 m1.5 m1.5 No. of teeth Shape Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width AH7 B C D E F H [Caution on Product Characteristics] 1 The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 478

31 Stainless Steel acks CP acks SUB ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash I J K Bending strength Surface durability Bending strength Surface durability (mm) 0.05~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~0. Weight (kg) SUB1.5- SUB1.5- SUB2- SUB2- SUB2.5- SUB2.5- SU- SU- SUB1.5- SUB1.5- SUB2- SUB2- SUB2.5- SUB2.5- SU- SU- SUB1.5- SUB1.5- SUB2- SUB2- SUB2.5- SUB2.5- SU- SU- [Caution on Secondary Operations] 1 Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. Inquiries are now being accepted on our website. 479

32 PB Plastic Module 1 ~ 3 acks CP acks ear ratio Module PB1.5- PB1.5- PB2- PB2- PB2.5- PB2.5- P- P- PB1- PB1- PB1.- PB1.- PB1.5- PB1.5- PB2- PB2- PB2.5- PB2.5- P- P- PB1.5- PB1.5- PB2- PB2- PB2.5- PB2.5- P- P- [Caution on Product Characteristics] m1.5 m1 m1. m1.5 m1.5 No. of teeth Specifications Precision grade JIS B 04 grade 4 * ear teeth Pressure angle Material Heat treatment leason MC1 Tooth hardness 1 ~ 1H * The precision grade of this product is equivalent to the value shown in the table. Shape Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width A B C D E F H Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), including bore size (H8 when produced), tooth diameter, and backlash. Please see the section Design of Plastic in the technical reference (Page 693). 2 The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see page 1 for more details. 3 Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. 4 Without lubrication, using plastic gears in pairs may generate heat and dilation. It is recommended to mate with steel gears. 4

33 Plastic acks PB ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash I J K Bending strength Surface durability Bending strength Surface durability CP acks 23 [Caution on Secondary Operations] (mm) 0~0. 0~0.26 0~0.27 0~0. 0~0.23 0~0. 0~0. 0~0.26 0~0.27 0~0. 0~0. 0~0.26 0~0.27 0~0. Weight (kg) PB1.5- PB1.5- PB2- PB2- PB2.5- PB2.5- P- P- PB1- PB1- PB1.- PB1.- PB1.5- PB1.5- PB2- PB2- PB2.5- PB2.5- P- P- PB1.5- PB1.5- PB2- PB2- PB2.5- PB2.5- P- P- 1 Please read Caution on Performing Secondary Operations (Page 2) when performing modifications and/or secondary operations for safety concerns. Haguruma Kobo, the KHK's system for quick modification of KHK stock gears is also available. 2 Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while performing secondary operations and during post-machining operations. Inquiries are now being accepted on our website. 481

34 CP acks DB Injection Molded Module 0.5 ~ 1 Specifications Precision grade JIS B 04 grade 8 ear teeth leason Pressure angle Material Duracon(M-44) Heat treatment Tooth hardness 1 ~ 1H acks ear ratio Module No. of teeth Shape DB0.5- DB0.5- DB0.8- DB0.8- DB1- DB1- [Caution on Product Characteristics] 2 m0.5 m0.8 m1 B1 B1 B1 Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length AH7 B C D E F The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 1 for more details. 2 The bore tolerance is generally to -0.1 but may be + values at the central portion of the hole. 3 To find the dimensional tolerance of these gears, please see the Dimensional Tolerance Table. B1 BB Sintered Metal Bushings Sintered Metal Bushings The table shows a series of standard metal bushings that can be pressed into standard Injection Molded. They can be used as bearing metal on idler gears or to reduce the bore of the gears. T8 B07 B06 I.D. of bushing O.D. of bushing ength that can use the bushing d 0 D DB0.8 DB1 Material : Oil impregnated sintered bronze. 482

35 Injection Molded acks CP acks DB Dimensional tolerance table(unit : mm) ange Hub width ength of bore Face width Holding surface dia. Allowable torque (N m) Allowable torque (kgf m) Backlash H I J K Bending strength Bending strength [Caution on Secondary Operations] Tolerance below 3 mm ± 0. 3 up to 6 mm ± 0. 6 up to mm ± 0. up to mm ± 0. up to mm ± 0. mm up ± 0. (mm) 0.03~ ~ ~0.13 Weight (kg) DB0.5- DB0.5- DB0.8- DB0.8- DB1- DB1-1 Avoid performing secondary operations as reworking material may expose air bubbles (voids). Inquiries are now being accepted on our website. 483

36 acks CP acks KSP round Spiral Catalog Number of NISSEI Spiral The catalog number systems of KSP round Spiral differs from other miter gears. KSP F Hand of Spiral () Shape (Finished Shape) Surface finish (round) ear atio (1) OD of the arger gear (31 mm) Type (Spiral ) The Characteristics of KSP Spiral 1. JIS rade 0, high strength, high precision products 2. Superior performance with regard to high speed, low noise, and low vibration. 3. Module range from 1.5 to 6 4. Three gear ratios: 1, 1.5 and 2 Style Type F - Finished Style Type U - Hub masked to Allow Secondary Operations The heavy lines in the figure below indicate the masked areas during carburizing. 484