Direction of Helix (R) No. of Teeth (20) Module (1) Others (Ground Gear) Type (Helical Gear) Material (SCM440)

Transcription

1 KH round Series Newly added m1 ~ 3 Page 168 SH Steel m2, 3 Page 178 CP acks 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. ear Pair (Example) K H 1 - Direction of Helix () No. of Teeth () Module (1) s (round ear) Type ( ear) Material (SCM440) Material Type S S45C H K SCM440 Information round 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 163 catalog_usa.indb /05/21 15:14:43

2 Characteristics KHK stock helical gears are quiet, compact and economical. They are suitable wherever you require high-speed rotation including in machine tools, speed reducers and other industrial machinery. The following table lists the main features. Selection Hints It is important to thoroughly understand the contents of the product tables as well as CAUTION notes before making the selection. You must specify the right or left hand by including the letter or in the catalog number when ordering. KH SH Module 1~3 2~3 Material SCM440 S45C Heat Treatment Thermal refined, ear teeth induction hardened Tooth Surface Finish round Cut Precision JIS B :1998 N6 N8 Secondary Operations Possible except for tooth Possible Features Have excellent strength and wear resistance which allow your designs to be more compact. Finished products for J Series are also available. Having larger contact ratios compared to the SS spur gears, effective in reducing noise and vibration. Advanced grinding equipment allows for efficient production The use of electro deposition grinding wheel produces consistent precision with shorter grinding usage, making products affordable. 1. Caution in Selecting the Mating. We have two different types of KHK helical gear products, one is a KH gear type, and the other is a SH gear type. Each type of gear has different module systems, pressure angle designations and helix angles. Since the KH are of the transverse module style, and the SH gears are of normal module style, KH and SH gears are not interchangeable. Please keep this in mind when making your selection. Also, right hand and left hand helical mating gears are packaged as a set. See the photos below for reference and for help in making a proper selection. The table shows the possible combinations. Mating ear Selection Chart ( Allowable Not allowable) & Helix Hand KH KH SH KH KHF SH H H H H H H H H H H SH H H Helix Direction eft() ight() Pinion()& ack() leason Cylindrical ear rinding Machine (Z701) Pinion()& ack() 164 catalog_usa.indb /05/21 15:14:45

3 KHK Technical Information Transverse module and Normal module The difference between transverse module and normal module is defined as the difference of basic tooth form. As shown on the right, the module of tooth datum orthogonal to the center axis of gear is called transverse module. The module of tooth datum orthogonal to the thread helix is called normal module. The characteristics of each are shown as below. Characteristics of Transverse module and Normal module Style Advantages Disadvantages Transverse module (KH) eplaces spur gears having the same module, number of teeth, and center distance. Special gear cutting or grinding machines are required for processing each helix angle. Normal module Transverse module Normal module (SH) Modifications of spur gears are made by gear cutting or grinding machines, even if they have different helix angles. Have a center distance value different from that of a spur gear, although they have the same module size and the same number of gear teeth. The center distance value is rarely an integral number. CAUTION Above is for illustration purpose only and not a representation of the true tooth forms. For detailed technical information, please refer to separate technical reference book, in the section of 4.3 (Page 22). 2. Caution in Selecting Based on ear Strength Allowable bending strength and surface durability values shown in product tables were computed by assuming a certain application environment. They should be used as reference only. We recommend that each user computes his own values by applying the actual usage conditions. To find more information on gear strength calculations, please refer to separate technical reference book, in the section Bending Strength of and (Page 71) or Surface Durability of and (Page 78). Calculation assumptions for Bending Strength of Item KH SH Formula NOTE 1 Formula of spur and helical gears on bending strength(jma401-01) No. of teeth of Mating Same number of teeth otation 600rpm 100rpm Durability Over 10 7 cycles Impact from motor Uniform load Impact from load Uniform load Direction of load Bidirectional Allowable bending stress at root σ Flim (kgf/mm 2 )NOTE Safety factor S F 1.2 Calculation assumptions for Surface Durability (Except where it is common with bending strength) Item Formula NOTE 1 Kinematic viscosity of lubricant ear support KH SH Formula of spur and helical gears on bending strength(jma402-01) 100cSt(50 ) Symmetric support by bearings Allowable Hertz stress σ Hlim (kgf/mm 2 ) Safety factor SH 1.15 NOTE 1 The formula for gear strength is based on JMA Standard. The units for the rotational speed (rpm) and the load (kgf/mm 2 ) were matched to the units needed in the equation. NOTE 2 The allowable bending stress at the root σ Flim is calculated from JMA401-01, and set to 2/3 of the value in the consideration of the use of planetary-, idler-, or other gear systems, loaded in both directions. Definition of Bending Strength by JMA (1974) 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. Definition of Surface Durability by JMA (1975) 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 failure. Example of the failure due to insufficient bending strength. Example of the defacement due to insufficient surface durability. 165 catalog_usa.indb /05/21 15:14:45

4 Application Hints In order to use KHK stock gears safely, carefully read the Application Hints before proceeding. If there are questions or if you require clarifications, please contact our technical department or your nearest distributor. KHK USA Inc. PHONE: 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, 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 the rework requires using scroll chucks, we recommend the use of new or rebored jaws for improved precision. If chucking by the teeth, please apply the pressure carefully to avoid crushing the teeth which will lead to noisy gears. 4 The maximum bore size is dictated by the requirement that the strength of the hub is to be higher than that of athe Operations 5 In order to avoid stress concentrations, leave radii on the keyway corners. Tapping & Keyway Slotting 6 To avoid problems of reduced gear precision and other manufacturing difficulties, do not attempt to machine the gears to reduce face widths. 7 KH round are already stress relieved. But if you subject them to a heavy turning operation such as removing the hubs, the residual stress may cause deformation. 8 When heat-treating SH, it is possible to get thermal stress cracks. It is best to subject them to penetrant inspection afterwards. If the tooth strength is not sufficient, it can be increased approximately four times by heat-treating. On the other hand, the precision of the gear will drop about one grade. Heat Treatment If you apply induction hardening to the gear teeth of S45C products, you need to designate the hardness and where to apply the heat treatment. Below is an example of common specifications and KHK's specifications for hardening: Common Specifications for Heat Treatment Area: Tooth surface, or, Tooth surface and Tooth root Hardness: Within 10 HC in the range from 45 to 60 HC. (e.g HC) KHK s Specifications for Heat Treatment Area: Tooth surface, or, Tooth surface and Tooth root Hardness: From 50 to 60 HC. the gear teeth. The maximum bore size should be 60% to 70% of the hub diameter (or tooth root diameter), and 50% to 60% for keyway applied modifications. *Hardness and Depth of ear-teeth Induction Hardening The hardening method and the state of hardened teeth area are varied depending on the size of gears. Since different hardening treatment is applied in accordance with the module and number of teeth, the hardness level you designate is referred to as the hardness of the reference diameter. For some of our products, there may be a case that the hardness at tooth tip / root may not be equal to the hardness you designated. As to the effective case depth for S45C, it is specified by JIS, as The distance from the surface of the case to the area with hardness HV450. The case depth differs from area to area of a tooth. 166 catalog_usa.indb /05/21 15:14:46

5 KHK Technical Information 2. Points of Caution in Assembling 1 KHK stock helical gears are designed to give the proper backlash when assembled using the center distance given by the formula on the right (center distance tolerance of H7 ~ H8). The amount of backlash is given in the product table for each gear. 2 Please refer to overall length tolerance for on page Because of the helix of the gear teeth, helical gears in mesh produce thrust forces in the axial directions. The axial thrust bearings must be able to resist these forces. The direction of the thrust forces depend on the helix hand and the direction of rotation as shown below. For details, please refer to separate technical reference book, section of ear Forces (Page 107). a = d 1 + d 2 2 where a :Center Distance d1 :Pitch Diameter of Pinion d2 :Pitch Diameter of ear Direction of otation and Thrust Force driven drive Thrust Bearing drive driven ack Thrust Pinion Thrust Pinion Thrust ack Thrust Pinion Thrust drive ack Thrust ack Thrust drive Pinion Thrust Application Examples eplaceable SS2-30 KH2-30 To increase strength, the SS2-30 ear is replaced with the KH2-30 ear (mating with the left hand of KH). 167 catalog_usa.indb /05/21 15:14:47

6 KH round Module 1 acks CP acks ear Pair earboxes 168 No. of teeth Direction of helix Shape ear teeth Standard full depth Transverse pressure angle Helix angle 21 30' Material SCM440 Heat treatment Thermal refinined, tooth surface induction hardened Tooth hardness 50 ~ 60HC Face width (E) 8 Hub width (F) 10 Total length () 18 offset (J) 5 * The precision grade of J Series products is equivalent to the value shown in the table. Bore Hub dia. Pitch dia. Outside dia. Allowable torque (N m) Allowable torque (kgf m) Backlash AH7 B C D Bending strength Surface durability Bending strength Surface durability (mm) KH1- KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH KH ~ KH1-100 KH ~ [Caution on Product Characteristics] 1 The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 165 for more details. 2 The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. 3 These gears produce axial thrust forces. See Page 167 for more details. 4 ight handed and left handed helical gears in the same module are designed to mesh as a pair, but KH gears are not interchangeable with SH type helical gears. [Caution on Secondary Operations] Precision grade eference section of gear Specifications JIS grade N6 (JIS B1702-1: 1998) JIS grade 2 (JIS B1702: 1976) otating plane Weight (kg) 1 Please read Caution on Performing Secondary Operations (Page 166) when performing modifications and/or secondary operations for safety concerns. KHK Transverse Module Normal Module Quick-Mod, the KHK's system for quick modification of KHK stock gears is also available. * Above is for illustration purposes only and differs 2 Due to the gear teeth being induction hardened, no secondary operations can be from actual tooth forms. To find more details, performed on tooth areas including the bottom land (approx. 2 to 3 mm). please see the section 4.3 in separate technical reference book (Page 22). 3 While cutting off the entire hub may cause curvature deformation by residual stress, some products are straightened and annealed after refining the material. catalog_usa.indb /05/21 15:14:49

7 KH Series round Newly added K T T To order J Series products, please specify; +J + BOE Bore H7 Keyway Js9 size KH1- J BOE KH1- J BOE KH1-22 J BOE KH1-22 J BOE KH1-24 J BOE KH1-24 J BOE KH1-25 J BOE KH1-25 J BOE KH1-28 J BOE KH1-28 J BOE KH1-30 J BOE KH1-30 J BOE KH1-32 J BOE KH1-32 J BOE KH1-35 J BOE KH1-35 J BOE KH1-36 J BOE KH1-36 J BOE KH1-40 J BOE KH1-40 J BOE KH1-44 J BOE KH1-44 J BOE KH1-45 J BOE KH1-45 J BOE KH1-48 J BOE KH1-48 J BOE KH1-50 J BOE KH1-50 J BOE KH1-60 J BOE KH1-60 J BOE KH1-70 J BOE KH1-70 J BOE KH1-80 J BOE KH1-80 J BOE KH1-90 J BOE KH1-90 J BOE KH1-100 J BOE KH1-100 J BOE [Caution on J series] The product shapes of J Series items are identified by background color. 1 As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. 2 Number of products we can process for one order is 1 to units. For quantities of 21 or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B1301 standards, Js 9 tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. 5 Areas of products which have been re-worked will not be black oxide coated. 6 For products having a tapped hole, a set screw is included. acks CP acks ear Pair earboxes You can download CAD data (DXF format) of KHK from the Web Catalog. 169 catalog_usa.indb /05/21 15:14:51

8 KH round Module 1.5 acks CP acks ear Pair earboxes 170 KH1.5- KH1.5- KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH [Caution on Product Characteristics] [Caution on Secondary Operations] No. of teeth Direction of helix Shape ear teeth Standard full depth Transverse pressure angle Helix angle 21 30' Material SCM440 Heat treatment Thermal refinined, tooth surface induction hardened Tooth hardness 50 ~ 60HC Face width (E) 12 Hub width (F) 12 Total length () 24 offset (J) 6 * The precision grade of J Series products is equivalent to the value shown in the table. Bore Hub dia. Pitch dia. Outside dia. Allowable torque (N m) Allowable torque (kgf m) Backlash AH7 B C D Bending strength Surface durability Bending strength Surface durability (mm) Precision grade eference section of gear Specifications JIS grade N6 (JIS B1702-1: 1998) JIS grade 2 (JIS B1702: 1976) otating plane Weight (kg) ~ The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 165 for more details. 2 The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. 3 These gears produce axial thrust forces. See Page 167 for more details. 4 ight handed and left handed helical gears in the same module are designed to mesh as a pair, but KH gears are not interchangeable with SH type helical gears. 1Please read Caution on Performing Secondary Operations (Page 166) 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. 2Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm). 3 While cutting off the entire hub may cause curvature deformation by residual stress, some products are straightened and annealed after refining the material ~ ~ catalog_usa.indb /05/21 15:14:51

9 KH Series round Newly added To order J Series products, please specify; +J + BOE Bore H7 Keyway Js9 size K The product shapes of J Series items are identified by background color. KH1.5- J BOE KH1.5- J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE [Caution on J series] 1 As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. 2 Number of products we can process for one order is 1 to units. For quantities of 21 or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B1301 standards, Js 9 tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. 5 Areas of products which have been re-worked will not be black oxide coated. 6 For products having a tapped hole, a set screw is included. acks CP acks ear Pair earboxes You can download CAD data (DXF format) of KHK from the Web Catalog. 171 catalog_usa.indb /05/21 15:14:53

10 KH round Module 2 acks CP acks ear Pair earboxes 172 No. of teeth KH2-15 KH KH2-16 KH KH2-18 KH KH2- KH2- KH2-22 KH KH2-24 KH KH2-25 KH KH2-26 KH KH2-28 KH KH2-30 KH KH2-32 KH KH2-35 KH KH2-36 KH KH2-40 KH KH2-44 KH KH2-45 KH KH2-48 KH KH2-50 KH KH2-52 KH KH2-60 KH KH2-70 KH KH2-80 KH KH2-90 KH KH2-100 KH [Caution on Product Characteristics] [Caution on Secondary Operations] Direction of helix Shape Precision grade eference section of gear Specifications JIS grade N6 (JIS B1702-1: 1998) JIS grade 2 (JIS B1702: 1976) otating plane ear teeth Standard full depth Transverse pressure angle Helix angle 21 30' Material SCM440 Heat treatment Thermal refinined, tooth surface induction hardened Tooth hardness 50 ~ 60HC Face width (E) 16 Hub width (F) 13 Total length () 29 offset (J) 6.5 * The precision grade of J Series products is equivalent to the value shown in the table. Bore Hub dia. Pitch dia. Outside dia. Allowable torque (N m) Allowable torque (kgf m) Backlash AH7 B C D Bending strength Surface durability Bending strength Surface durability (mm) Weight (kg) ~ ~ ~ The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 165 for more details. 2 The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. 3 These gears produce axial thrust forces. See Page 167 for more details. 4 ight handed and left handed helical gears in the same module are designed to mesh as a pair, but KH gears are not interchangeable with SH type helical gears. 1 Please read Caution on Performing Secondary Operations (Page 166) 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. 2 Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm). 3 While cutting off the entire hub may cause curvature deformation by residual stress, some products are straightened and annealed after refining the material. catalog_usa.indb /05/21 15:14:53

11 KH Series round Newly added To order J Series products, please specify; +J + BOE Bore H7 Keyway Js9 size KH2-15 J BOE KH2-15 J BOE KH2-16 J BOE KH2-16 J BOE KH2-18 J BOE KH2-18 J BOE KH2- J BOE KH2- J BOE KH2-22 J BOE KH2-22 J BOE KH2-24 J BOE KH2-24 J BOE KH2-25 J BOE KH2-25 J BOE KH2-26 J BOE KH2-26 J BOE KH2-28 J BOE KH2-28 J BOE KH2-30 J BOE KH2-30 J BOE KH2-32 J BOE KH2-32 J BOE KH2-35 J BOE KH2-35 J BOE KH2-36 J BOE KH2-36 J BOE KH2-40 J BOE KH2-40 J BOE KH2-44 J BOE KH2-44 J BOE KH2-45 J BOE KH2-45 J BOE KH2-48 J BOE KH2-48 J BOE KH2-50 J BOE KH2-50 J BOE KH2-52 J BOE KH2-52 J BOE KH2-60 J BOE KH2-60 J BOE KH2-70 J BOE KH2-70 J BOE KH2-80 J BOE KH2-80 J BOE KH2-90 J BOE KH2-90 J BOE KH2-100 J BOE KH2-100 J BOE [Caution on J series] K The product shapes of J Series items are identified by background color. 1 As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. 2 Number of products we can process for one order is 1 to units. For quantities of 21 or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B1301 standards, Js 9 tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. 5 Areas of products which have been re-worked will not be black oxide coated. 6 For products having a tapped hole, a set screw is included. acks CP acks ear Pair earboxes You can download CAD data (DXF format) of KHK from the Web Catalog. 173 catalog_usa.indb /05/21 15:14:54

12 KH round Module 2.5 acks CP acks ear Pair earboxes 174 KH KH KH KH KH KH KH2.5- KH2.5- KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH KH [Caution on Product Characteristics] [Caution on Secondary Operations] No. of teeth Direction of helix Shape Precision grade eference section of gear Specifications JIS grade N6 (JIS B1702-1: 1998) JIS grade 2 (JIS B1702: 1976) otating plane ear teeth Standard full depth Transverse pressure angle Helix angle 21 30' Material SCM440 Heat treatment Thermal refinined, tooth surface induction hardened Tooth hardness 50 ~ 60HC Face width (E) Hub width (F) 14 Total length () 34 offset (J) 7 * The precision grade of J Series products is equivalent to the value shown in the table. Bore Hub dia. Pitch dia. Outside dia. Allowable torque (N m) Allowable torque (kgf m) Backlash AH7 B C D Bending strength Surface durability Bending strength Surface durability (mm) The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 165 for more details. 2 The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. 3 These gears produce axial thrust forces. See Page 167 for more details. 4 ight handed and left handed helical gears in the same module are designed to mesh as a pair, but KH gears are not interchangeable with SH type helical gears. 1 Please read Caution on Performing Secondary Operations (Page 166) 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. 2 Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm). 3 While cutting off the entire hub may cause curvature deformation by residual stress, some products are straightened and annealed after refining the material. Normal Module Weight (kg) ~ ~ ~ Transverse Module * Above is for illustration purposes only and differs from actual tooth forms. To find more details, please see the section 4.3 in separate technical reference book (Page 22). catalog_usa.indb /05/21 15:14:54

13 KH Series round Newly added To order J Series products, please specify; +J + BOE Bore H7 Keyway Js9 size KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH2.5- J BOE KH2.5- J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE KH J BOE [Caution on J series] K The product shapes of J Series items are identified by background color. 1 As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. 2 Number of products we can process for one order is 1 to units. For quantities of 21 or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B1301 standards, Js 9 tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. 5 Areas of products which have been re-worked will not be black oxide coated. 6 For products having a tapped hole, a set screw is included. acks CP acks ear Pair earboxes You can download CAD data (DXF format) of KHK from the Web Catalog. 175 catalog_usa.indb /05/21 15:14:56

14 KH round Module 3 acks CP acks ear Pair ear Pair earboxes 176 KH3-15 KH3-15 KH3-16 KH3-16 KH3-18 KH3-18 KH3- KH3- KH3-22 KH3-22 KH3-24 KH3-24 KH3-25 KH3-25 KH3-26 KH3-26 KH3-28 KH3-28 KH3-30 KH3-30 KH3-32 KH3-32 KH3-35 KH3-35 KH3-36 KH3-36 KH3-40 KH3-40 KH3-44 KH3-44 KH3-45 KH3-45 KH3-48 KH3-48 KH3-50 KH3-50 KH3-52 KH3-52 KH3-60 KH3-60 [Caution on Product Characteristics] [Caution on Secondary Operations] No. of teeth Direction of helix Shape ear teeth Standard full depth Transverse pressure angle Helix angle 21 30' Material SCM440 Heat treatment Thermal refinined, tooth surface induction hardened Tooth hardness 50 ~ 60HC Face width (E) 25 Hub width (F) 16 Total length () 41 offset (J) 8 * The precision grade of J Series products is equivalent to the value shown in the table. Bore Hub dia. Pitch dia. Outside dia. Allowable torque (N m) Allowable torque (kgf m) Backlash AH7 B C D Bending strength Surface durability Bending strength Surface durability (mm) Precision grade eference section of gear Specifications JIS grade N6 (JIS B1702-1: 1998) JIS grade 2 (JIS B1702: 1976) otating plane 1 The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 165 for more details. 2 The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. 3 These gears produce axial thrust forces. See Page 167 for more details. 4 ight handed and left handed helical gears in the same module are designed to mesh as a pair, but KH gears are not interchangeable with SH type helical gears. 1 Please read Caution on Performing Secondary Operations (Page 166) 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. 2 Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 2 to 3 mm). 3 While cutting off the entire hub may cause curvature deformation by residual stress, some products are straightened and annealed after refining the material. Normal Module Weight (kg) ~ ~ ~ Transverse Module * Above is for illustration purposes only and differs from actual tooth forms. To find more details, please see the section 4.3 in separate technical reference book (Page 22). catalog_usa.indb /05/21 15:14:56

15 KH Series round Newly added To order J Series products, please specify; +J + BOE Bore H7 Keyway Js9 size KH3-15 J BOE KH3-15 J BOE KH3-16 J BOE KH3-16 J BOE KH3-18 J BOE KH3-18 J BOE KH3- J BOE KH3- J BOE KH3-22 J BOE KH3-22 J BOE KH3-24 J BOE KH3-24 J BOE KH3-25 J BOE KH3-25 J BOE KH3-26 J BOE KH3-26 J BOE KH3-28 J BOE KH3-28 J BOE KH3-30 J BOE KH3-30 J BOE KH3-32 J BOE KH3-32 J BOE KH3-35 J BOE KH3-35 J BOE KH3-36 J BOE KH3-36 J BOE KH3-40 J BOE KH3-40 J BOE KH3-44 J BOE KH3-44 J BOE KH3-45 J BOE KH3-45 J BOE KH3-48 J BOE KH3-48 J BOE KH3-50 J BOE KH3-50 J BOE KH3-52 J BOE KH3-52 J BOE KH3-60 J BOE KH3-60 J BOE [Caution on J series] K The product shapes of J Series items are identified by background color. 1 As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. 2 Number of products we can process for one order is 1 to units. For quantities of 21 or more pieces, we need to quote price and lead time. 3 Keyways are made according to JIS B1301 standards, Js 9 tolerance. 4 Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. 5 Areas of products which have been re-worked will not be black oxide coated. 6 For products having a tapped hole, a set screw is included. acks CP acks ear Pair earboxes You can download CAD data (DXF format) of KHK from the Web Catalog. 177 catalog_usa.indb /05/21 15:14:58

16 SH Steel Module 2 3 acks CP acks ear Pair earboxes SH2-15 SH2-15 SH2- SH2- SH2-30 SH2-30 SH2-40 SH2-40 SH2-60 SH2-60 SH2-90 SH2-90 SH3-15 SH3-15 SH3- SH3- SH3-30 SH3-30 SH3-40 SH3-40 SH3-60 SH3-60 Module No. of teeth [Caution on Product Characteristics] m2 m Specifications Precision grade JIS grade N8 (JIS B1702-1: 1998) JIS grade 4 (JIS B1702: 1976) eference section of gear Normal plane ear teeth Standard full depth Transverse pressure angle Helix angle 15 Material Heat treatment Tooth hardness Direction of helix S45C Shape 1 The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 165 for more details. 2 The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. 3 These gears produce axial thrust forces. See Page 167 for more details. 4 ight handed and left handed helical gears in the same module are designed to mesh as a pair, but SH gears are not interchangeable with KH type helical gears. (less than 194HB) Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length AH7 B C D E F Normal Module Transverse Module * Above is for illustration purposes only and differs from actual tooth forms. To find more details, please see the section 4.3 in separate technical reference book (Page 22). * For products not categorized in our KHK Stock ear series, custom gear production services with short lead times is available. For details see Page catalog_usa.indb /05/21 15:14:59

17 SH Allowable torque (N m) Allowable torque (kgf m) Backlash Bending strength Surface durability Bending strength Surface durability (mm) Weight (kg) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ [Caution on Secondary Operations] SH2-15 SH2-15 SH2- SH2- SH2-30 SH2-30 SH2-40 SH2-40 SH2-60 SH2-60 SH2-90 SH2-90 SH3-15 SH3-15 SH3- SH3- SH3-30 SH3-30 SH3-40 SH3-40 SH3-60 SH Please read Caution on Performing Secondary Operations (Page 166) 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. 2Avoid performing secondary operations that narrow the tooth width as it affects precision and strength. ear Pair acks CP acks SH ear Center Distance SH2-15 SH2- SH2-30 SH2-40 SH2-60 SH2-90 SH SH SH SH SH SH SH ear Center Distance SH3-15 SH3- SH3-30 SH3-40 SH3-60 SH SH SH SH SH earboxes You can download CAD data (DXF format) of KHK from the Web Catalog. 179 catalog_usa.indb /05/21 15:14:59

18 KHK Topics ear Cube Certified as Kawaguchi i-mono Brand CU ear Assembly Kit (For use in learning about gears) CU-M CU-H CU-N m 0m mm CU-W CU- 10 CU-S 0m m al Option CU-H45 Hand Wheel CU-H ear Kit CU-S ear Kit Installment : Parallel axes gears (Two-stage) ear Type : : 2 units of S units of P.5-22 ear atio : 1.89 Weight : Approx. 1kg The ear Kit contains two-stage spur gears and allows speed increases / reductions, and includes the most commonly used combinations of gears. CU-M ear Kit Installment : Parallel axes gears ear Type : ( ) : SN PN ear atio : 1 Weight : Approx. 1kg gears have more strength than spur gears of the same dimensions and have the advantage of being less noisy. CU-N ear Kit Installment : Intersecting axes gears ear Type : : SM2-25 PM2-25 ear atio : 1 Weight : Approx. 1kg Use of bevel gears allows the changing of the shaft angle by 90 degrees. Applications include the changing of the direction of power. Installment : Nonparallel and nonintersecting gears ear Type : : SN PN ear atio : 1 Weight : Approx. 1kg are helical gears used in nonparallel and nonintersecting situations. Applications include devices like conveyers with light loads. CU- ack Kit Installment : Parallel axes gears ear Type : acks : SO P.5- Weight : Approx. 1kg Use of racks enables the conversion of rotation motion to linear motion. Applications include devices that provide lift. CU-W ear Pair Kit Installment : Nonparallel and nonintersecting gears ear Type : ear Pair : SW2-1 P2-1 ear atio : Weight : Approx. 1kg ear Pairs can be used to make large reductions in speed in a single phase. The gear cannot be driven by the worm wheel due to inherent self-locking. * These kits are not for actual use to transmit power and please use only as representations of gear systems. 180 catalog_usa.indb /05/21 15:15:05