Need a ground helical gear for a precision transmission? KHG is the KHK series to examine when tooth accuracy and a broad choice of sizes matter.
Customer: What makes this series useful?
KAYO: KHG uses SCM440 steel with hardened and ground teeth. Its transverse-module tooth system differs from the normal-module SH family.
Customer: Which sizes can I choose?
KAYO: The current Japanese selection table lists 152 standard model codes, with module values 1, 1.5, 2, 2.5, 3, 4, 5, 6 and tooth counts from 15 to 100. Here are examples from that table.
| Model | Module | Teeth | Outside diameter (mm) | Mass (kg) |
|---|---|---|---|---|
| KHG1-20R | 1 | 20 | 22 | 0.034 |
| KHG2-18R | 2 | 18 | 40 | 0.17 |
| KHG2.5-60R | 2.5 | 60 | 155 | 3.20 |
| KHG4-40RS | 4 | 40 | 168 | 6.08 |
| KHG6-60LS | 6 | 60 | 372 | 43.2 |
Customer: How do I select the right model?
KAYO: Check the transverse module, tooth count, helix hand, bore and mating gear geometry. Choose the correct right-hand or left-hand version; do not substitute an SH gear using the module number alone. Helical teeth create axial thrust, so include suitable bearing support and lubrication in the design.
Customer: What are the listed model numbers?
KAYO: The standard models shown in the official selection table are:
KHG1-20R, KHG1-20L, KHG1-24R, KHG1-24L, KHG1-30R, KHG1-30L, KHG1-40R, KHG1-40L, KHG1-50R, KHG1-50L, KHG1-60R, KHG1-60L, KHG1-70R, KHG1-70L, KHG1.5-20R, KHG1.5-20L, KHG1.5-24R, KHG1.5-24L, KHG1.5-30R, KHG1.5-30L, KHG1.5-32R, KHG1.5-32L, KHG1.5-36R, KHG1.5-36L, KHG1.5-40R, KHG1.5-40L, KHG1.5-50R, KHG1.5-50L, KHG1.5-60R, KHG1.5-60L, KHG1.5-80R, KHG1.5-80L, KHG1.5-90R, KHG1.5-90L, KHG1.5-100R, KHG1.5-100L, KHG2-15R, KHG2-15L, KHG2-18R, KHG2-18L, KHG2-20R, KHG2-20L, KHG2-25R, KHG2-25L, KHG2-26R, KHG2-26L, KHG2-30R, KHG2-30L, KHG2-32R, KHG2-32L, KHG2-35R, KHG2-35L, KHG2-36R, KHG2-36L, KHG2-40R, KHG2-40L, KHG2-48R, KHG2-48L, KHG2-50R, KHG2-50L, KHG2-60R, KHG2-60L, KHG2-70R, KHG2-70L, KHG2-80R, KHG2-80L, KHG2.5-18R, KHG2.5-18L, KHG2.5-20R, KHG2.5-20L, KHG2.5-26R, KHG2.5-26L, KHG2.5-40R, KHG2.5-40L, KHG2.5-48R, KHG2.5-48L, KHG2.5-60R, KHG2.5-60L, KHG3-16R, KHG3-16L, KHG3-18R, KHG3-18L, KHG3-20R, KHG3-20L, KHG3-24R, KHG3-24L, KHG3-28R, KHG3-28L, KHG3-30R, KHG3-30L, KHG3-35R, KHG3-35L, KHG3-36R, KHG3-36L, KHG3-40R, KHG3-40L, KHG3-45R, KHG3-45L, KHG3-48R, KHG3-48L, KHG3-50R, KHG3-50L, KHG3-60R, KHG3-60L, KHG4-18RS, KHG4-18LS, KHG4-20RS, KHG4-20LS, KHG4-25RS, KHG4-25LS, KHG4-30RS, KHG4-30LS, KHG4-36RS, KHG4-36LS, KHG4-40RS, KHG4-40LS, KHG4-50RS, KHG4-50LS, KHG4-60RS, KHG4-60LS, KHG5-18RS, KHG5-18LS, KHG5-20RS, KHG5-20LS, KHG5-25RS, KHG5-25LS, KHG5-30RS, KHG5-30LS, KHG5-36RS, KHG5-36LS, KHG5-40RS, KHG5-40LS, KHG5-50RS, KHG5-50LS, KHG5-60RS, KHG5-60LS, KHG6-18RS, KHG6-18LS, KHG6-20RS, KHG6-20LS, KHG6-25RS, KHG6-25LS, KHG6-30RS, KHG6-30LS, KHG6-36RS, KHG6-36LS, KHG6-40RS, KHG6-40LS, KHG6-50RS, KHG6-50LS, KHG6-60RS, KHG6-60LS
Customer: What should I send with an enquiry?
KAYO: Please share the complete model number, quantity, mating gear or rack details, bore and keyway requirements, operating speed and load. We can then discuss the specification and availability for your application.
Reference: KHK KHG official model selection table | KHK helical gear range. Dimensions and model availability should be confirmed against the latest manufacturer drawing.