Looking for a practical steel helical gear for a parallel-shaft drive? KHK SH offers standard sizes in both right-hand and left-hand versions.
Customer: What makes this series useful?
KAYO: SH is a normal-module S45C steel helical gear series with cut teeth. The standard SH version is distinct from the hardened SH-H series.
Customer: Which sizes can I choose?
KAYO: The current Japanese selection table lists 20 standard model codes, with module values 2, 3 and tooth counts from 15 to 60. Here are examples from that table.
| Model | Module | Teeth | Outside diameter (mm) | Mass (kg) |
|---|---|---|---|---|
| SH2-15R | 2 | 15 | 35.06 | 0.15 |
| SH2-30L | 2 | 30 | 66.12 | 0.72 |
| SH3-15R | 3 | 15 | 52.59 | 0.52 |
| SH3-30L | 3 | 30 | 99.17 | 2.20 |
| SH3-60L | 3 | 60 | 192.35 | 9.18 |
Customer: How do I select the right model?
KAYO: Match normal module, pressure angle and helix angle. For a parallel-shaft external gear pair, select opposite helix hands and confirm center distance and shaft mounting. 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:
SH2-15R, SH2-15L, SH2-20R, SH2-20L, SH2-30R, SH2-30L, SH2-40R, SH2-40L, SH2-60R, SH2-60L, SH3-15R, SH3-15L, SH3-20R, SH3-20L, SH3-30R, SH3-30L, SH3-40R, SH3-40L, SH3-60R, SH3-60L
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 SH official model selection table | KHK helical gear range. Dimensions and model availability should be confirmed against the latest manufacturer drawing.