Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your robotics project, CNC build, or automation mechanism demands reliable torque reduction with minimal backlash, finding a matched worm gear and worm shaft set that fits your exact bore and outer diameter can be a real challenge. This 1 Module worm gear and worm shaft set is designed for engineers, hobbyists, and makers who need dimensionally accurate, mechanically sound components without guesswork.
This set includes a 25-tooth brass worm gear wheel and a choice of 45# steel worm shaft (A Type or B Type). The worm gear is machined from brass for smooth, quiet meshing, while the worm shafts are turned from 45# medium-carbon steel for strength and wear resistance. Bore diameters range from 6 mm to 15 mm (approximately 0.24 in to 0.59 in), with worm shaft outer diameters spanning Ø18 mm to Ø28 mm (approximately 0.71 in to 1.10 in). Module is 1 (metric standard), with 25 teeth on the gear wheel.
Typical use cases include 1 mod worm gear set for robotics arm joints, 45 steel worm shaft for CNC rotary axis, and brass worm gear wheel for low-noise automation conveyor drives. Available in multi-piece quantities (1, 2, 3, 5, or 10 PCS) for prototyping or small-batch production runs.
| Module | 1 (Metric) |
|---|---|
| Worm Gear Teeth | 25 Teeth |
| Worm Gear Material | Brass |
| Worm Shaft Material | 45# Medium-Carbon Steel |
| Worm Shaft Type | A Type / B Type (see variant options) |
| Bore Diameter (Gear) | 6 mm / 8 mm / 10 mm / 12 mm (see variant options) |
| Bore Diameter (Shaft) | 6 mm – 15 mm (see variant options) |
| Shaft Outer Diameter | Ø18 mm / Ø22 mm / Ø26 mm / Ø28 mm (see variant options) |
| Keyway Options | 4×1.8 mm or 5×2.3 mm keyway on select bore sizes |
| Available Quantities | 1 / 2 / 3 / 5 / 10 PCS |
| Pressure Angle | See variant options |
| Surface Finish | See variant options |
A Type and B Type worm shafts differ in their end configuration and overall length. A Type typically features a plain cylindrical shaft end, while B Type may include a different shoulder or end profile suited to specific housing or coupling arrangements. Check your housing drawing or coupling spec to confirm which end style fits your assembly before ordering.
Yes — both the worm gear wheel and the worm shaft in this listing are Module 1, so they are designed to mesh with each other. For correct engagement, both components in any worm drive pair must share the same module. Do not mix Module 1 parts with Module 0.5, 1.5, or 2 components.
Select the bore diameter that matches your motor or drive shaft diameter. For example, if your motor output shaft is 8 mm, choose the 8 mm bore variant. If your shaft requires a keyway for positive torque transmission, select a variant that specifies a keyway dimension such as 4×1.8 mm or 5×2.3 mm keyway.
Brass is the standard material for worm gear wheels in moderate-load applications. It offers good machinability, low friction against steel, and natural corrosion resistance. For light-to-medium duty robotics, automation, and conveyor applications, brass worm gears perform reliably. For very high-torque or continuous heavy-duty industrial use, consult a mechanical engineer to confirm suitability.
45# medium-carbon steel provides good mechanical strength but has limited inherent corrosion resistance compared to stainless steel. For indoor or dry environments, it performs well. If your application involves moisture or humidity, consider applying a light machine oil coating or using a protective housing to extend service life.
Yes. Module 1 worm gear sets are commonly used in CNC rotary table and 4th-axis builds where a high reduction ratio and compact footprint are needed. Verify that the worm shaft outer diameter and bore fit your planned housing dimensions, and confirm the gear ratio meets your required reduction before finalizing your design.
With a 25-tooth worm gear and a single-start worm shaft, the ratio is 25:1 — meaning the worm shaft must rotate 25 times to turn the gear wheel once. Confirm the number of starts on the worm shaft variant you select to calculate your exact ratio.
