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When your project demands a compact, high-ratio speed-reduction solution, finding a matched worm gear and worm shaft set that fits your shaft and delivers consistent torque transfer can be a real challenge. This Module 1.5 worm gear and worm shaft set is designed for hobbyists, robotics builders, and small-machine engineers who need reliable mechanical drive components without custom machining.
The set pairs a 24-tooth brass worm gear wheel with a C45 medium-carbon steel worm shaft (available in A, B, and C shaft configurations). Bore diameters range from 8 mm to 17 mm (approximately 0.31 in to 0.67 in), with plain bore and keyed bore options (3×1.4 mm, 4×1.8 mm, and 5×2.3 mm keyways) to suit a wide range of shaft-to-hub connections. Available in quantities from 1 to 10 pieces per order.
Typical use cases include DIY rotary table drives and indexing fixtures, low-speed conveyor and actuator mechanisms for maker projects, and compact worm-drive assemblies in robotics, camera pan-tilt rigs, and automated gate or valve systems requiring self-locking behavior.
| Module | 1.5 |
|---|---|
| Gear Type | Worm Gear Wheel + Worm Shaft (matched set) |
| Number of Teeth (Gear) | 24 |
| Gear Material | Brass |
| Shaft Material | C45 Medium-Carbon Steel |
| Shaft Types Available | A Type, B Type, C Type |
| Bore Diameter Range | 8 mm – 17 mm (approx. 0.31 in – 0.67 in) |
| Keyway Options | Plain bore; 3×1.4 mm; 4×1.8 mm; 5×2.3 mm |
| Outer Diameter (Gear) | See variant options |
| Face Width (Gear) | See variant options |
| Shaft Length | See variant options |
| Surface Finish | See variant options |
| Available Quantities | 1, 2, 3, 5, 10 PCS |
| Weight (per piece) | See variant options |
Measure your shaft diameter with calipers and match it to the available bore sizes (8, 10, 12, 14, 15, 16, or 17 mm). If your shaft uses a key for positive torque transfer, select the keyed bore variant whose keyway dimensions (width × depth) match your shaft's key slot — 3×1.4 mm for smaller shafts, 4×1.8 mm for mid-range, and 5×2.3 mm for larger shafts. If no key is used, a plain bore with a set screw or interference fit is sufficient for lighter loads.
The A, B, and C designations refer to the shaft body configuration — primarily the overall length, the position and length of the threaded or smooth shaft sections, and the shoulder geometry used for mounting. A Type is typically the shortest configuration, B Type is mid-length, and C Type is the longest. Select the type that fits your housing or bearing span. If you are unsure, contact us with your housing drawing for confirmation.
The C45 steel worm shaft provides solid tensile strength suitable for light-to-medium duty drive applications. The brass worm gear offers good wear resistance against the steel shaft. Exact torque ratings depend on operating speed, lubrication, and duty cycle. For continuous high-load applications, we recommend consulting a mechanical engineer to verify the drive is appropriately sized for your torque and speed requirements.
Brass has inherent corrosion resistance in most indoor and light-outdoor environments, making it suitable for applications where mild moisture exposure may occur. For harsh environments (salt spray, chemical exposure, or continuous wet conditions), additional protective coatings or stainless-steel alternatives should be considered. The C45 steel shaft should be kept lubricated to prevent surface oxidation.
Yes — as long as the mating component is also Module 1.5, the tooth geometry will be compatible. However, the bore diameter and shaft type must still match your specific assembly. This listing sells the worm gear and worm shaft as a matched pair; mixing gear and shaft from different suppliers may result in fit or engagement issues if manufacturing tolerances differ.
Yes. At Module 1.5 with a single-start worm, the lead angle is typically low enough to produce self-locking behavior — meaning the load on the gear cannot back-drive the worm shaft. This is useful in lifting mechanisms, positioning tables, valve actuators, and camera rigs where you want the load to hold position without a separate brake. Note that self-locking efficiency is lower than non-self-locking drives, so factor this into your motor sizing.
This listing sells the worm gear wheel and worm shaft as a set. The variants allow you to select the gear bore size, shaft type, material combination, and quantity. If you need only one component, please contact us — we may be able to accommodate separate component orders depending on availability.
