KHK Stock Gears Selection Methods

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Roy Silvester Wells
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Excellent Low Noise Qualities Recommended

Helical m1 ~ 4 Page 34 Newly added m1 ~ 3 Page

Application Example OKUMA 2SP-25HG Lathe machine

Can be operated 24-hours a day by attaching a

Recommended Products SSG Ground Spur SRG SRGF

5 ~ 6 Page 198 SMSG Ground Spiral Miter SBSG

5 ~ 3 Newly added m1 ~ 5 Page 258 m2 ~ 4 Page

1 KHK Stock Selection Methods 2. Select by Application High Precision with Excellent Low Noise Qualities Recommended Products MSGA MSGB Ground Spur KHG Ground Helical m1 ~ 4 Page 34 Newly added m1 ~ 3 Page 168 KRGF-H KRGFD-H Hardened Ground Racks KRHG KRHGF Ground Helical Racks m1.5 ~ 3 Page 196 m1 ~ 3 Page 220 Machine Application Example OKUMA 2SP-25HG Lathe machine with output of φ 100 to 200 mm. Can be operated 24-hours a day by attaching a loader that produces 150 to 300 units per day. KHK gears (KRGD and MSGA) are used. Quenched, Ground with High Durability Recommended Products SSG Ground Spur SRG SRGF SRGFD SRGFK Ground Racks m0.5 ~ 6 Page 48 m0.5 ~ 6 Page 198 SMSG Ground Spiral Miter SBSG Ground Spiral Gear Ratio 1.5 ~ 3 Newly added m1 ~ 5 Page 258 m2 ~ 4 Page 290 Machine Application Example Precision Roll Feeder A machine for cutting off stainless steel belts at designated lengths. KHK gears (SSG) are used in the feeding device of the servomotor. 16

Antirust and Oil-free Components Spur Recommended Products

Steel Racks Helical m1 ~ 4 Page 114 m1 ~ 4 Page 212

~ 3 Page 140v m1 ~ 3 Page 216 & Pinions High Reduction,

vegetable cutting machine, by DREMAX Inc.

force-feed device used to produce sushi (sashimi) garnishes.

radish, and set to Daikon cutting, the machine performs

In addition, handles two radishes at one time, for doubled

Our Gear Products (PR and PS) are used in this machine.

~ 120 Reduction Ratio 10 ~ 60 Newly added m0.

Worm Gear Pair Gearboxes Other Products Newly added m1 ~ 6

2 Antirust and Oil-free Components Spur Recommended Products SUS SUSA Stainless Steel Spur SUR SURF SURFD Stainless Steel Racks Helical m1 ~ 4 Page 114 m1 ~ 4 Page 212 Internal PS PSA Plastic Spur PR PRF Plastic Racks Racks m1 ~ 3 Page 140v m1 ~ 3 Page 216 & Pinions High Reduction, High-load Machine Application Example F-T200 High-speed vegetable cutting machine, by DREMAX Inc. A high-precision vegetable cutting machine with a force-feed device used to produce sushi (sashimi) garnishes. To use this machine, just cut off both sides of a Daikon radish, and set to Daikon cutting, the machine performs automatically. In addition, handles two radishes at one time, for doubled efficiency. Our Gear Products (PR and PS) are used in this machine. Recommended Products SW Steel Worms BG Bronze Worm Wheels Miter Screw m0.5 ~ 6 Page 372 CG Gray Iron Worm Wheels Reduction Ratio 10 ~ 120 Reduction Ratio 10 ~ 60 Newly added m0.5 ~ 6 Page 372 MHP High-Ratio Hypoid Gear Ratio 15 ~ 200 Worm Gear Pair Gearboxes Other Products Newly added m1 ~ 6 Page 374 m1, 1.5 Page 288 Machine Application Example Yaesu Steam Kettle A food processing machine with water holding capacity of 360L and cooking capacity of 216kg (Machine Model SK-6). KHK gears (SW and CG) are used in this machine. For updated information see KHK Web Catalog 17

Example KWGDL KWGDLS Duplex Worms & Worm Wheels AGDL Duplex Worm

pinion axially by 1mm changes the backlash by 0.02mm.

the backlash of a worm gear assembly is to modify the center

Once assembled, such adjustment requires a major rework of the gear

The use of duplex worm gears and worm wheels allows backlash

This simplifies greatly the assembly and maintenance operations.

Page 230 4 Tapered Racks & Pinions CP5, 10 Page 230 Examples CP5,

axially by 1mm changes the backlash by 0.05mm.

produces backlash values of 0.1 to 0.26.

SUSL Stainless Steel Fairloc Hub Spur DSL Acetal Fairloc Hub Spur

3 KHK Stock Selection Methods 2. Select by Application Components with Backlash Considerations Example KWGDL KWGDLS Duplex Worms & Worm Wheels AGDL Duplex Worm Shafts & Worm Wheels Reduction Ratio 20 ~ 60 Page 348 Duplex Worms & Worm Wheels m1.5 ~ 4 Page 348 m1.5 ~ 4 Page 348 Features These are designed so that moving the pinion axially by 1mm changes the backlash by 0.02mm. Description of Duplex Worm Gear Pair 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 gear housing. The use of duplex worm gears and worm wheels allows backlash adjustment to be made by axially shifting the worm. This simplifies greatly the assembly and maintenance operations. Example CP KTSCP Tapered Pinions STRCPF STRCPFD CP Tapered Racks Page Tapered Racks & Pinions CP5, 10 Page 230 Examples CP5, 10 Page 230 Features These are designed so that moving the pinion axially by 1mm changes the backlash by 0.05mm. Tapered Pinion Tapered Rack A SRCP and SSCP5-30 combination produces backlash values of 0.1 to STRCPF and KTSCP5-30 combination can have the backlash value of 0.05 or less. (Target value) Mount the on the Shaft with a Single Touch Example SUSL Stainless Steel Fairloc Hub Spur DSL Acetal Fairloc Hub Spur gears SSAY/K Spur with Built-In Clamps Page 120 Page 124 m0.5 ~ 1 Page 120 m0.5 ~ 1 Page 124 m0.8, 1 Page 106 Page 108 Special Features Possible to mount repeatedly without marring the shafts. The component consists of one screw; this simple construction leads to lower costs. Machining of shafts or auxiliary mounting hardware is not necessary. Especially suitable when positional adjustment is needed after assembly. 18

Convenient Positioning in Linear Motion Applications Example CP SSCPG Ground Spur SRGCP SRGCPF SRGCPD CP Ground Racks CP SSCP Spur Page 226 SRCP SRCPF SRCPFD Spur Newly added CP5 ~ 20 Page 236 CP5 ~

One turn One half turn Difference between CP10 and m3 Pitch About & Pinions The reference pitch of a metric module is computed by multiplying the number of module by π(3.14159).

When using a rack and a pinion in linear motion applications, the fact that the pitch is not an integral number presents a difficulty in accurate positioning.

SS3 spur gears is illustrated on the left.

all in accordance with environmental conditions. Further, this arrangement leads to low-cost maintenance, and selective replacement is possible without the purchasing of an entire set of components.

Table Rack Characteristics of Racks & Pinions Advantages Description Simple component including a small number of parts This simple component does not include parts such as balls or retainers, so

4 Convenient Positioning in Linear Motion Applications Example CP SSCPG Ground Spur SRGCP SRGCPF SRGCPD CP Ground Racks CP SSCP Spur Page 226 SRCP SRCPF SRCPFD Spur Newly added CP5 ~ 20 Page 236 CP5 ~ 20 Page 236 Newly added CP2.5 ~ 20 Page 244 CP2.5 ~ 20 Page 246 Helical Movement of one cycle of the CP10-30 pinion on a CP rack vs.ss3-30 (m3) on a m3 rack. One turn One half turn Difference between CP10 and m3 Pitch About & Pinions The reference pitch of a metric module is computed by multiplying the number of module by π( ). For example, the reference pitch of m3 rack is 9.425mm (3 x π). When using a rack and a pinion in linear motion applications, the fact that the pitch is not an integral number presents a difficulty in accurate positioning. This problem is solved by using circular pitch racks and pinions where one rotation of a pinion moves it precisely 50, 100, 150, to 600. The difference in movement of one rotation of 30-teeth CP10 vs. SS3 spur gears is illustrated on the left. Internal Racks Functional Comparison of Linear Motion Mechanisms The basic mechanism of rack gears allows flexibility in the design of materials, heat treatments, strength and accuracy parameters, all in accordance with environmental conditions. Further, this arrangement leads to low-cost maintenance, and selective replacement is possible without the purchasing of an entire set of components. For designing linear motion mechanisms, use the following information about their features as reference. Table Rack Characteristics of Racks & Pinions Advantages Description Simple component including a small number of parts This simple component does not include parts such as balls or retainers, so there is no concern about missing pieces when assembling or disassembling. Capable of handling large loads Racks with large modules can be used in large loadings. Compact component systems can be created Allows compact component usage for light loads, while downsizing is possible, more than a ball screw mechanism. High power transmission efficiency Approximately 98% power transmission efficiency is implemented. (Resistance against lubricant agitation or bearing is not included.) Rapid feeding It enables quick feeding if the pinion has a large radius, Has no limitation in length Racks can be joined lengthwise, conversely, in case of using a screw mechanism, defection must be considered and the maximum length should be within 2 meters. Designed for flexibly Flexibly designed within certain conditions, materials, heat treatments, shapes etc., easily adapting to most machines. High accuracy Applying tooth-grinding, pitch errors can be lessened Used in food machine equipments MC Nylon Plastic or Stainless Steel products are available. Disadvantages Description Backlash evident For smooth revolution, essential backlash is required. In the case of positioning forward reverse revolution, backlash is not a concern. Lubrication required Pinion Stroke Motor Characteristics of Ball Screws Lubrication is necessary for metal racks. For plastic racks, using light loads, lubrication is not required, however, accuracy is low. Advantages Description High power efficiencytransmission High power transmission efficiency, exceeding 90%. High accuracy Grinding treatment allows the creating of high-precision ball screws. Rapid feeding High-helix lead screws enable rapid feeding. No backlash is present Pressurizing eliminates backlash. Disadvantages Limited in length Special purposes are difficult to create. Base Linear Guide Pinion Motor Motor bracket Rack Table Ball Screw Shaft Nut Bracket Support Unit (Supported-side) Stroke Description Practical limit would be approximately 2m due to warpage. Since it is difficult to create special-purpose ball screws, the machine must be set up in accordance with the shape of the ball screw. Table Ball Screw Nut Linear Guide Base Support Unit (Fixed-side) Coupling Motor bracket Motor & Pinions Miter Screw Worm Gear Pair Gearboxes Other Products 19

KHK Stock Selection Methods 3. Select by Gear Strength Gear Strength is one of the most important factors in selecting gears.

allowable root stress of two meshing gears under load. Approximate the type of gear, strength and torque load.

transmitted safely without incurring surface failures. Example of failure due to insufficient bending strength.

Step 2 Make a tentative selection based on the torque load using the printed version of the KHK catalog, or the Web catalog.

5 KHK Stock Selection Methods 3. Select by Gear Strength Gear Strength is one of the most important factors in selecting gears. Step 1 Definition of Bending Strength The allowable bending strength of a gear is defined as the allowable tangential force at the pitch circle based on the mutually allowable root stress of two meshing gears under load. Approximate the type of gear, strength and torque load. Definition of Surface Durability The surface durability of a gear is defined as the allowable tangential force at the pitch circle, which permits the force to be transmitted safely without incurring surface failures. Example of failure due to insufficient bending strength. Example of defacement due to insufficient surface durability. Step 2 Make a tentative selection based on the torque load using the printed version of the KHK catalog, or the Web catalog. The KHK catalog is used for the tentative selections. The Web catalog is used for the tentative selections. Spur Helical Internal Racks & Pinions Miter Step 3 After calculating the required strength using the actual conditions of usage, examine the selection mode in Step 2. If the Web catalog is used, the strength can be easily confirmed. Screw Worm Gear Pair For KHK Stock, see page 11 Other Products Gearboxes Also, please refer to Safety Considerations when Selecting. (Page 27) 20

6 KHK Stock Selection Methods 4. Selection by novices Please select product series from the performance / price indication chart below. Motion Direction Parallel Axes Linear Motion Product Groups Features High Performance Spur Helical Internal Regular Anti rust P29 P163 P181 Racks Helical Racks Unlubricated Regular Anti rust P187 P187 P225 Intersecting Axes Miter Unlubricated Regular Anti rust P251 P281 Nonparallel & Nonitersecting Axes Screw Worm Gear Pairs Unlubricated Regular Anti rust P325 P339 Unlubricated Spur Helical Other Products Gearboxes Worm Gear Pair Screw Internal Racks Miter & Pinions Low Cost * Please read through the selection / application hints in the pages of each product series, based on your selection. Also, please refer to the product specifications in the dimensional table for selecting gears fitting your requirements in mind. 21

7 Index 5. Select by Catalog Number Gear Type Page Features A AG Worm Wheels 354~357,364~371 AGDL Duplex Worms Wheels 348~353 AGF Worm Wheels 358~363 AN Aluminum-Bronze Screw 334~335 ARL Rack Guide Rails 219 B BB Sintered Metal Bushings 154,279,314 BG Bronze Worm Wheels 372~373 BSR Brass Racks 216 BSS Brass Spur 156~161 C CBX Gearboxes 404~407 CG Gray Iron Worm Wheels 374~387 D DB Injection Molded 314~315 DG Plastic Worm Wheels 388~389 DM Injection Molded Miter 278 DR Molded Flexible Racks 218~219 DRF Plastic Racks 214~215 DRFD Plastic Racks 214~215 DRFK Plastic Racks 214~215 DS Injection Molded Spur 124~127 DSL Acetal Fairloc Hub Spur 136~139 F FRCP CP Metal Flexible Racks 250 G GC Gear Couplings (Inner Hubs) 418~421 GC-I Gear Couplings (Outer Rings) 418~421 GCU Gear Assembly Kit 426~427 K KBX Gearboxes 400~403 KHG Ground Helical 168~177 KRCPF CP Thermal Refined Racks 242~243 KRCPF-H CP Hardened Racks 240~241 KRCPFD CP Thermal Refined Racks 242~243 KRCPFD-H CP Hardened Racks 240~241 KRF Thermal Refined Racks 204~205 KRF-H Hardened Racks 200~201 KRFD Thermal Refined Racks 204~205 KRFD-H Hardened Racks 200~201 KRG Thermal Refined Ground Racks 196~197 KRGCP CP Thermal Refined Ground Racks 234~235 KRGCPF CP Thermal Refined Ground Racks 234~235 KRGCPD CP Thermal Refined Ground Racks 234~235 KRGCPF-H CP Hardened Ground Racks 234~235 KRGCPFD-H CP Hardened Ground Racks 234~235 KRGD Thermal Refined Ground Racks 196~197 KRGF Thermal Refined Ground Racks 196~197 KRGF-H Hardened Ground Racks 196~197 Feature Icons RoHS Compliant Product Re-machinable products Finished Product Heat Treated Product Ground Gear Stainless Product Resin Product Copper alloy Product Injection Molded Product Black Oxide Coated Product 22

8 Gear Type Page Features KRGFD-H Hardened Ground Racks 196~197 K KRHG Ground Helical Racks 220~221 KRHGF Ground Helical Racks 220~221 KRHGFD Ground Helical Racks 220~221 KSCP CP Spur 242~243 KSP Ground Spiral 318~323 KTSCP CP Tapered Pinions 230~231 KWG Ground Worm Shafts 354~363 KWGDL Duplex Worms 348~353 KWGDLS Duplex Worms 348~353 L LM Sintered Metal Miter 270~271 LS Sintered Metal Spur 112~113 M MBSA Finished Bore Spiral 294~297 MBSB Finished Bore Spiral 294~297 MBSG Ground Spiral 290~291 MHP High-Ratio Hypoid 288~289 MM Carburized & Hardened Miter 270~271 MMS Spiral Miter 262~263 MMSA Finished Bore Spiral Miter 260~261 MMSB Finished Bore Spiral Miter 260~261 MMSG Ground Spiral Miter 256~257 MRGCPF CP Hardened Ground Racks 232~233 MRGCPFD CP Hardened Ground Racks 232~233 MRGF Hardened Ground Racks 194~195 MRGFD Hardened Ground Racks 194~195 MSCPG CP Ground Spur 232~233 MSGA Ground Spur 34~45 MSGB Ground Spur 34~45 N NSU Plastic Spur with Steel Core 128~137 P PB Plastic 312~313 PBX Miniature Gearboxes 396~399 PG Plastic Worm Wheels 390~393 PM Plastic Miter 278~279 PN Plastic Screw 336~337 PR Plastic Racks 216 PRF Plastic Racks 216 PS Plastic Spur 140~149 PSA Plastic Spur 140~149 PU Plastic Spur with Stainless Steel Core 138~139 S SAM Angular Miter 274~275 SB Steel 304~309 SB Steel & Pinion Shafts 308~309 SBS Spiral 298~301 SBSG Ground Spiral 292~293 SBY Steel 304~309 SBZG Ground Zerol 302~303 SH Steel Helical 178~179 SI Steel Internal 184~185 SIR Steel Ring 186 SM Steel Miter 272~273 23

9 Index Gear Type Page Features S SMA Finished Bore Miter 268~269 SMB Finished Bore Miter 268~269 SMC Finished Bore Miter 268~269 SMS Spiral Miter 264~265 SMSG Ground Spiral Miter 258~259 SMZG Ground Zerol Miter 266~267 SN Steel Screw 328~331 SR Steel Racks 208 SRAF Steel Racks with Machined Ends 206~207 SRAFD Racks 206~207 SRAFK Racks 206~207 SRCP 246~247 SRCPF 246~247 SRCPFD 246~247 SRCPFK 246~247 SRCPF-H CP Hardened Racks 240~241 SRCPFD-H CP Hardened Racks 240~241 SRF Steel Racks with Machined Ends 209 SRFD Steel Racks with Bolts Holes 210~211 SRFK Steel Racks with Bolts Holes 210~211 SRF-H Hardened Racks 202~203 SRFD-H Hardened Racks 202~203 SRG Hardened Ground Racks 198~199 SRGCP CP Hardened Ground Racks 238~239 SRGCPF CP Hardened Ground Racks 238~239 SRGCPFD CP Hardened Ground Racks 238~239 SRGF Ground Racks 198~199 SRGFD Ground Racks 198~199 SRGFK Ground Racks 198~199 SRH Steel Helical Racks 222~223 SRHF Steel Helical Racks 222~223 SRHFD Steel Helical Racks 222~223 SRO Steel Round Racks 217 SROCP Round Racks 250 SROS Round Racks 217 SRS Rack Clamps 218 SRT Ratchets 414~415 SRTB Ratchets with Hubs 416~417 SRT-C Pawls 414,416 SS Steel Spur 64~95 SSA Steel Hubless Spur 96~101 SSAY Steel Hubless Thin Face Spur 106~107 SSAY/K Spur with Built-In Clamps 108~111 RoHS Compliant Product Re-machinable products Finished Product Heat Treated Product Ground Gear Stainless Product Resin Product Copper alloy Product Injection Molded Product Black Oxide Coated Product 24

10 Gear Type Page Features SSCP CP Steel Spur 244~245 SSCPG CP Ground Spur 236~237 SSCPGS CP Ground Spur Pinion Shafts 236~237 SSDR DR Rack Pinions 218~219 SSG Ground Spur 48~61 S SSGS Ground Spur Pinion Shafts 46~47 SSR Steel Ring (Spur ) 162 SSS Spur Pinion Shafts 62~63 SSY Steel Thin Face Spur 102~105 STRCPF CP Tapered Racks 230~231 STRCPFD CP Tapered Racks 230~231 SUB Stainless Steel 310~311 SUKB Stainless Steel Hubs 150~151 SUM Stainless Steel Miter 276~277 SUMA Finished Bore Stainless Steel Miter 276~277 SUN Stainless Steel Screw 332~333 SUR Stainless Steel Racks 212~213 SURCPF CP Stainless Steel Racks 248~249 SURCPFD CP Stainless Steel Racks 248~249 SURF Stainless Steel Racks 212~213 SURFD Stainless Steel Racks 212~213 SURO Stainless Steel Round Racks 217 SUS Stainless Steel Spur 114~119 SUSA Stainless Steel Spur 116~119 SUSCP CP Stainless Steel Spur 248~249 SUSL Stainless Steel Fairloc Hub Spur 120~123 SUW Stainless Steel Worms 388~393 SV Involute Spline Shafts 422~425 SVI Involute Spline Bushings 422 SW Steel Worms 372~387 SWG Ground Worms 364~371 25

RoHS Compliance All products are R HS Compliant! Products only in the KHK Stock Gear series are RoHS compliant. For customized gears, please make the request when asking for a quote.

Products can not be exported to EU countries without following. The following six substances are regulated by usage due to environmental considerations.

4 wt%, Copper alloy 4 wt% Mercury:0.1 wt%(1000ppm) Hexavalent chromium:0.1 wt%(1000ppm) PBB(Polybrominated biphenyl):0.1 wt%(1000ppm) PBDE(Polybrominated diphenyl ether) :0.

11 RoHS Compliance All products are R HS Compliant! Products only in the KHK Stock Gear series are RoHS compliant. For customized gears, please make the request when asking for a quote. RoHS Compliance Restriction of Hazardous Substances RoHS is a compliance ordinance established by the European Parliament / European Commission. Products can not be exported to EU countries without following. The following six substances are regulated by usage due to environmental considerations. Allowable maximum density of these six substances for RoHS compliance Cadmium:0.01wt%(100ppm) Lead:0.1 wt%(1000ppm) Exception depending on usage Steel 0.35 wt%, Aluminum 0.4 wt%, Copper alloy 4 wt% Mercury:0.1 wt%(1000ppm) Hexavalent chromium:0.1 wt%(1000ppm) PBB(Polybrominated biphenyl):0.1 wt%(1000ppm) PBDE(Polybrominated diphenyl ether) :0.1 wt%(1000ppm) KHK Environmental Practices An appeal from KHK for the disposal of KHK Stock and packing materials Steel Products Nylon Cardboards Paperboards Other packing materials Please sort by materials and recycle. Nylon gears are a plastic waste. Please dispose as a reusable industrial waste. Please recycle cardboards used as packing. Please recycle paperboards used as packing. Packing materials like plastic bags, mirrors and boxes are plastic waste. Please dispose as a reusable industrial waste. MSDS Activities In regards to environmental issues, rust preventive oil and packing materials, which are used in the production of our products, are managed by safety data sheets similar to the disposal management of chemicals. Green Purchasing 70 percent of office supplies we purchase are made of environmentally friendly materials. For details, please refer to the Page 432 and KHK Environmental Policy. 26

Safety Considerations when Selecting KHK Stock To select KHK Stock, please be sure to carefully consider the characteristics of the items and contents of the product table in each section of a

12 Safety Considerations when Selecting KHK Stock To select KHK Stock, please be sure to carefully consider the characteristics of the items and contents of the product table in each section of a product series. Attention As for items not in this catalog or products having specifications (material, modules, tooth number etc.) not shown in the dimension tables, KHK handles custom-made gear product requests. To order custom-made gears, please refer to the information on the page 8. Caution in regards to the special characteristics is described in each dimension table in the product information page. Please read carefully to understand the correct specifications and select suitable gears properly. When selecting gears with angled teeth, please be careful and understand the helix direction of the mating gear. These gears cannot be installed with an improper orientation. For details, please refer to the information in the first page of each product series. There might be cases that the products shown in each product information page are different from the actual shown products, in color or shape. Especially for shapes, please be sure and check the information in the dimension tables. For the purpose of modifications, there are cases where specifications or dimensions are changed without notice. The most updated information is published on the KHK Web Catalog, at our official web site. Keep up to date, by visiting the web site. Thank you very much. We publish any changes and corrections to the catalog on our web site. Keep up to date, by visiting the web site. Thank you very much. Spur Helical Internal Racks & Pinions Miter Screw Worm Gear Pair Gearboxes For ordering KHK Stock, please place an order by letting us know the catalog number of each item. You will find explanations about the catalog number in the first page of each product series. Other Products For more information, please visit our web site, or contact MARYLAND METRICS sales@mdmetric.com web: 27

13 Safety Considerations when Using KHK In order for our customers to use our products safely: We consider safety to be of utmost importance. Please consider the following issues in order to prevent danger in handling, assembling, and operating KHK products. Warning Protection of Body and Property 1. Follow all applicable safety regulations (Labor, Safety, and Sanitation Regulations) in installing and operating our products. 2. Adhere to the following procedures when installing, dismantling or inspecting our products. 1 Turn off the power. 2 Do not place any part of your body in harm's way. 3 Wear proper attire and protective gear appropriate for the task. Attention Prevention of Accidents 1. Please read the CAUTION notes before using our products in your applications. 2. Please avoid using the products in an environment where it may cause adverse effects. 3. KHK Products are made in accordance with ISO 9000 Quality Standard. However, if any defective products are found, please contact the dealer. Precautions on Applications 1. KHK products are individually packaged to avoid damage during shipping. In case you find rust, scratches, dents or other problems when you unpack your gears, please contact the dealer where you made your purchase. 2. Depending on how they are handled, it is still possible to deform or break gears. Please be sure to handle gears carefully, especially the long racks or ring gears, as they are easily deformed. Precautions on Performing Secondary Operations 1. We can not guarantee the precision of gears once a customer performs a modification (secondary operation) on any gears. 2. When you apply additional secondary operations on KHK Stock, please read through the information Cautions on Performing Secondary Operations on the first page of each product series section. Precautions on Assembling 1. KHK are designed so to give the proper backlash as long as assembled in accordance with the normal value (theoretical values) of the center distance. For a pair of gears, the center distance tolerance is specified to the plus side of tolerances H7 to H8. However, in case of using multiple gear trains, please aim for near-zero by setting to a plus-tolerance, or minus-tolerance. 2. When you assemble gears, please read through the information Points of Caution in Assembling on the first page of each product series section. Precautions on Starting Operations 1. Before operating, check the following: 1 Are the gears firmly mounted on the shafts? 2 Have you eliminated uneven tooth contact? 3 Does the gear mesh have a proper amount of backlash? (Please avoid the condition of no backlash) 4 Is there sufficient lubrication? 2. If the gears are exposed, install a safety cover for protection. Never touch gears while they are in motion. 3. The following are the gear lubrication methods for general use. (a) Grease Lubrication (b) Splash Lubrication (Oil Bath Method) (c) Forced Oil Circulation Lubrication Check lubrication after start up, sometimes, when the unit is initially being operated, lubricating oil deteriorates rapidly. 4. If there is unusual noise or vibration at the start up, please recheck the gears and correctness of the assembly. Some of the (a) (b) (c) methods for achieving noise reduction are: High Precision Fine Tooth Surface Finish Accurate Tooth Contact 28 Please feel free to contact: MARYLAND METRICS sales@mdmetric.com

SSS Spur Pinion Shafts. SS Steel Spur Gears. m0.5 ~ 10 Page 64. SUS SUSA Stainless Steel Spur Gears. Series. m0.5 ~ 1 Page 156. DS Injection Molded

SSS Spur Pinion Shafts. SS Steel Spur Gears. m0.5 ~ 10 Page 64. SUS SUSA Stainless Steel Spur Gears. Series. m0.5 ~ 1 Page 156. DS Injection Molded MSGA MSGB Ground SSGS Ground Pinion Shafts SSG Ground SSS Pinion Shafts SS Steel SSA Steel Hubless SSY Steel Thin Face m1 ~ Page 3 SSAY Steel Hubless Thin Face m1. ~ 3 Page SSAY/K with Built-In Clamps