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When your motion-control build demands reliable torque transfer at a right angle, mismatched or low-tolerance worm drive components become the weakest link. This listing covers a complete selection of Module 1 steel worm shafts and plastic nylon worm gear wheels, sourced for hobbyists, robotics builders, CNC enthusiasts, and small-scale industrial designers who need repeatable, dimensionally consistent parts without over-engineering the budget.
The set includes stainless steel worm shafts (Type A and Type B) and C45 carbon steel shafts (Type B and Type L), paired with injection-molded nylon worm gear wheels ranging from 15 to 80 teeth. Bore sizes span 5 mm (≈0.197 in) to 12 mm (≈0.472 in). Shaft outer diameters and gear wheel pitch diameters conform to Module 1 (1 mm/tooth) standards, with a nominal pitch diameter of approximately 25.4 mm (1.000 in) for the gear wheels.
Typical use cases include DIY pan-tilt camera rigs requiring self-locking worm drive assemblies, compact conveyor or indexing table mechanisms where a high reduction ratio in a small footprint is needed, and educational robotics platforms or 3D-printer extruder gearboxes calling for lightweight nylon gear wheels paired with steel worm shafts.
| Module | 1 (1 mm per tooth) |
|---|---|
| Shaft Materials | Stainless Steel (Type A, Type B); C45 Carbon Steel (Type B, Type L) |
| Gear Wheel Material | Plastic Nylon (PA) |
| Tooth Count (Gear Wheel) | 15 / 20 / 25 / 30 / 35 / 40 / 50 / 60 / 80 Tooth — See variant options |
| Bore Diameter | 5 mm / 6 mm / 8 mm / 10 mm / 12 mm — See variant options |
| Pitch Diameter (Gear Wheel) | Approx. 25.4 mm (1.000 in) nominal |
| Drive Type | Worm and Worm Gear (right-angle drive) |
| Pressure Angle | See variant options |
| Lead Angle | See variant options |
| Surface Finish (Steel Shaft) | See variant options |
| Quantity per Order | 1 piece |
Stainless steel shafts (Type A and Type B) resist oxidation and are the better choice for humid environments, outdoor enclosures, or food-adjacent applications where surface corrosion is a concern. C45 carbon steel shafts offer slightly higher machinability and are a cost-effective option for indoor, dry-environment builds where corrosion is not a primary risk. If you plan to machine a keyway or set-screw flat onto the shaft, C45 is generally easier to work with standard tooling.
Because these are single-start worm shafts paired with Module 1 gear wheels, the reduction ratio equals the tooth count of the gear wheel. A 15-tooth wheel gives 15:1, a 40-tooth wheel gives 40:1, and an 80-tooth wheel gives 80:1. This makes it straightforward to select the right tooth count for your target output speed and torque multiplication requirement.
Module 1 single-start worm drives with standard lead angles are typically self-locking under static load, meaning the gear wheel cannot back-drive the worm shaft when the motor is unpowered. This is useful for lifting stages, positioning tables, and valve actuators. However, self-locking behavior depends on friction conditions — lubrication, load magnitude, and vibration can reduce back-drive resistance. Do not rely solely on worm self-locking for safety-critical load-holding without a secondary mechanical brake.
Nylon (PA) gear wheels are intentionally softer than the steel worm shaft, which means the gear wheel acts as the sacrificial wear component — protecting the shaft and making replacement economical. In lightly loaded, intermittent-duty applications (robotics, camera rigs, small conveyors), nylon wheels perform well and offer low noise and self-lubrication benefits. For continuous-duty, high-load, or high-temperature environments, a metal gear wheel would be more appropriate.
Measure the outer diameter of your motor output shaft or axle with a caliper. Available bore sizes are 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm. Select the bore that matches your shaft diameter. If your shaft has a flat (D-shaft) or keyway, you will need to machine or file the bore accordingly after receiving the part — the bore is supplied as a round hole. Note that not all bore sizes are available for every model; check the variant selector for your specific combination.
Yes. All worm shafts and worm gear wheels in this listing are Module 1 and are designed to mesh with each other. Select one worm shaft variant and one worm gear wheel variant with the bore sizes appropriate for your build. The shaft and wheel do not need to share the same bore size — the shaft bore fits your motor, and the wheel bore fits your output axle independently.
Type A and Type B refer to different shaft geometry configurations — typically differing in overall shaft length, thread length, or end-machining style (such as the length of the smooth shaft section on each side of the worm thread). Type L (Long) shafts feature an extended shaft body, providing more engagement length for mounting in deeper bearing housings or gearbox frames. Refer to the product images for dimensional drawings of each type, or contact us to confirm which type suits your housing design.
