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When your project demands a compact right-angle drive that won't slip under load, a mismatched or undersized worm gear set is the first thing that fails. Engineers, robotics builders, and workshop DIYers who need consistent torque reduction in tight spaces rely on a matched worm gear wheel and worm shaft combination machined to a consistent module standard.
This module 1 worm gear set is machined from 45 carbon steel — a medium-carbon alloy known for its balance of hardness and machinability. Worm wheels are available in 15, 20, 25, 30, 35, 40, 50, and 60 tooth counts; bore sizes range from 5 mm (0.197 in) to 15 mm (0.591 in). The worm shaft is offered in Type B (standard straight-bore) and Type L (long-body) configurations. Pitch diameter of the worm wheel is 1.000 in (25.4 mm) at module 1.
Typical use cases include DIY CNC axis drives requiring a self-locking worm gear reduction, conveyor and rotary table indexing mechanisms where a module 1 worm wheel provides precise angular steps, and compact robotic joint actuators where a worm shaft and wheel pair delivers high reduction ratios in a small envelope.
| Gear Type | Worm Gear (Wheel & Shaft) |
|---|---|
| Module | 1 (M1) |
| Material | 45 Carbon Steel |
| Worm Wheel Tooth Counts | 15 / 20 / 25 / 30 / 35 / 40 / 50 / 60 |
| Bore Diameter Range | 5 mm – 15 mm (0.197 in – 0.591 in) |
| Pitch Diameter (Worm Wheel) | 25.4 mm (1.000 in) |
| Worm Shaft Types | Type B (Standard) / Type L (Long Body) |
| Pressure Angle | See variant options |
| Lead Angle | See variant options |
| Surface Finish | See variant options |
| Available Quantities | 1 pcs / 2 pcs |
The tooth count determines your gear reduction ratio. For a single-start worm shaft, the ratio equals the number of teeth on the worm wheel. For example, a 40-tooth worm wheel paired with a single-start worm shaft gives a 40:1 reduction. Choose a higher tooth count for more torque and slower output speed, or a lower count (e.g., 15 teeth) for a faster output with less reduction.
They are listed as separate variant options (Worm Wheel and Worm Shaft) within the same product. Both are machined to module 1 standards and are designed to work together. When ordering, select the worm wheel tooth count and bore size you need, then add the corresponding worm shaft type. If you need both, add each to your cart separately or select the 2 pcs quantity option for the component you need multiples of.
Measure your motor output shaft or drive shaft diameter precisely with calipers. Select the bore size that matches — available options are 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, and 15 mm. A bore that is too large will require a keyway or set-screw modification; a bore that is too small cannot be installed without machining. If your shaft is imperial, convert to metric (e.g., 1/4 in ≈ 6.35 mm → select 6 mm or machine to fit).
Module 1 worm gear sets with a low lead angle (typically single- or double-start worms) are generally self-locking, meaning the output shaft cannot back-drive the input. This makes them suitable for lifting, positioning, and indexing applications where holding position without a brake is important. Confirm the lead angle of the specific worm shaft variant if self-locking is a critical requirement for your design.
Type B is the standard worm shaft with a conventional body length, suitable for most direct-drive and compact gearbox applications. Type L features a longer body, providing additional shaft engagement length and greater support in housings that require extended bearing spans or higher axial load capacity. Select Type L when your housing design or torque requirements demand more shaft length beyond the worm thread section.
Both the worm wheel and worm shaft are machined from 45 carbon steel, a medium-carbon alloy that offers good machinability and can be heat-treated for increased surface hardness. The standard finish is a machined surface; if your application requires additional corrosion protection (e.g., in humid or outdoor environments), consider applying a compatible gear lubricant or sourcing a coated variant. Contact us to confirm surface treatment details for your specific variant.
Yes, module 1 worm gear sets in 45 steel are suitable for light-to-moderate continuous-duty applications such as conveyor drives, rotary tables, and small actuators. For heavy continuous-duty cycles or high ambient temperatures, ensure adequate lubrication with a suitable gear oil (ISO VG 220 or equivalent worm gear lubricant) and verify that the gear housing provides sufficient heat dissipation. Overloading beyond the rated torque for the tooth count selected will accelerate wear.
