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When your power transmission project demands a reliable reduction stage, a mismatched or undersized worm gear set becomes the weakest link in the entire drivetrain. Engineers, hobbyists, and workshop builders who need a compact, high-ratio reduction solution will find this Module 1 worm gear set a dependable foundation for gearbox assemblies, conveyor drives, and rotary indexing fixtures.
Each set is machined from 45# carbon steel — a medium-carbon alloy known for its balance of tensile strength and machinability. The gear wheel follows Module 1 (1 Mod) geometry with a rough bore hub ready for custom shaft fitting, available in 15T, 20T, 25T, 30T, 35T, 40T, 45T, 50T, 55T, 60T, 70T, 80T, and 100T configurations. Pitch diameter scales linearly with tooth count: a 15T wheel measures 15 mm (0.59 in) pitch diameter, while the 100T wheel reaches 100 mm (3.94 in).
Typical use cases include DIY worm gearbox fabrication for slow-speed conveyor lines, rotary table indexing on milling setups, and motorized gate or actuator mechanisms where a self-locking reduction ratio is required. Long-tail applications: "1 mod worm gear set for stepper motor", "carbon steel worm wheel rough bore gearbox", "Module 1 worm reduction gear DIY".
Machined from medium-carbon 45# steel for solid tensile strength and wear resistance across continuous-duty reduction applications.
Available in 15T through 100T (15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80, 100 teeth), covering a wide range of reduction ratios in a single product line.
The wheel hub ships with a rough bore, allowing machinists to bore and key to any required shaft diameter — no compromise on fit or concentricity.
Worm gear geometry provides inherent back-drive resistance at typical lead angles, useful for holding loads without a separate brake in low-speed actuator builds.
Module 1 means pitch diameter (mm) equals tooth count numerically — straightforward center-distance calculation for gearbox housing design.
Suited for conveyor drives, rotary indexing tables, motorized gates, stepper motor gearboxes, and other low-speed, high-torque DIY power transmission builds.
| Material | 45# Carbon Steel |
|---|---|
| Module | 1 (1 Mod) |
| Teeth Count Options | 15T, 20T, 25T, 30T, 35T, 40T, 45T, 50T, 55T, 60T, 70T, 80T, 100T |
| Pitch Diameter | Equal to tooth count in mm (e.g., 15T = 15 mm / 0.59 in; 100T = 100 mm / 3.94 in) |
| Bore Type | Rough Bore (customer machining required) |
| Gear Type | Worm Reduction Gear Wheel |
| Pressure Angle | See variant options |
| Face Width | See variant options |
| Hub Diameter | See variant options |
| Surface Finish | See variant options |
| Weight | See variant options |
The reduction ratio of a worm gear set equals the number of teeth on the worm wheel divided by the number of starts on the worm shaft. For a single-start worm, a 40T wheel gives 40:1 reduction, a 20T wheel gives 20:1, and so on. Select the tooth count that matches your required output speed and torque. Higher tooth counts provide greater reduction and higher output torque at lower output RPM.
The wheel ships with a rough bore — the hub is pre-drilled but not finish-bored to a specific diameter. You will need to machine (bore and optionally key) the hub to match your shaft diameter. This approach gives you full control over fit tolerance and keyway geometry. Contact us to confirm the rough bore range for your selected tooth count before ordering.
45# steel (equivalent to AISI 1045) is a medium-carbon steel with a typical tensile strength of approximately 600–800 MPa in the normalized condition. It is well-suited for moderate-load worm gear applications such as conveyor drives, rotary tables, and motorized actuators. For very high shock loads or corrosive environments, consider whether a hardened or stainless alternative would be more appropriate for your specific duty cycle.
45# carbon steel has limited inherent corrosion resistance. For indoor, dry, or lightly oiled environments this is generally acceptable with routine maintenance lubrication. For outdoor, humid, or washdown environments, apply a suitable protective coating or lubricant, or consider a stainless steel alternative. Regular lubrication of the worm mesh is recommended regardless of environment to extend service life.
This wheel is designed for use with a Module 1 worm shaft. The worm shaft must share the same module (1 Mod) and pressure angle to mesh correctly. The number of starts on the worm shaft determines the gear ratio in combination with the wheel tooth count. Verify the center distance between worm and wheel axes matches your housing design before assembly.
Yes. Module 1 worm gear sets are commonly used in stepper and servo motor gearbox builds for CNC rotary axes, indexing tables, and low-speed positioning systems. Ensure the motor output shaft diameter is compatible with the rough bore range of the wheel hub (machining required), and that the worm shaft is coupled securely to the motor shaft with appropriate alignment.
Worm gear sets with a low lead angle (typically single-start worms at Module 1) exhibit self-locking behavior, meaning the output shaft cannot back-drive the input. This is useful for holding a load in position without a separate brake. However, self-locking is not guaranteed under all conditions (vibration, shock loads, or high-efficiency worm designs may reduce this effect). Do not rely solely on self-locking for safety-critical load-holding applications.
