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When your project demands a compact, self-locking gear drive that won't strip under load, sourcing a matched worm gear wheel and worm shaft in the right tooth count and bore size is the first challenge makers and engineers face. This listing solves that problem in one place — offering a complete selection of module 1 worm gear wheels (15 to 60 tooth) and paired Type A / Type B worm shafts, all machined from 304 stainless steel for corrosion resistance and long service life. Suitable for hobbyists, prototype builders, and small-scale mechanical engineers who need reliable, dimensionally consistent drive components.
The worm gear wheels are available in 15, 20, 25, 30, 35, 40, 50, and 60 tooth counts, with bore diameters ranging from 5 mm (0.20 in) to 12 mm (0.47 in). Pitch diameter is 1.000 in (25.4 mm). Worm shafts are offered in Type A and Type B configurations with bore sizes from 6 mm (0.24 in) to 10 mm (0.39 in). All components are module 1 (1 mm/tooth pitch), ensuring interchangeability within the same module standard.
Typical applications include low-speed, high-torque actuator drives for robotic arms and pan-tilt mechanisms, self-locking worm drive lifts for DIY CNC z-axis assemblies, and compact gear reduction stages in automated conveyor or indexing systems. The stainless steel construction makes these worm gear sets well-suited for light-duty food-adjacent or humid-environment builds where mild corrosion resistance is needed.
Machined from 304-grade stainless steel for solid corrosion resistance and durability in demanding environments — including humid workshops and light-duty outdoor enclosures.
All gears conform to the module 1 (1 mm pitch) standard, ensuring consistent tooth geometry and reliable meshing between worm wheel and worm shaft components in this set.
Worm gear wheels available in 15, 20, 25, 30, 35, 40, 50, and 60 tooth counts — enabling gear ratios from 15:1 to 60:1 when paired with a single-start worm shaft.
Bore diameters from 5 mm to 12 mm (0.20–0.47 in) accommodate a wide range of motor shafts and drive axles without custom machining in most hobby and light industrial applications.
The worm drive geometry provides natural back-drive resistance at typical lead angles, making these sets suitable for lift, positioning, and indexing applications where load holding is needed.
Choose between Type A (plain shaft ends) and Type B (stepped/shoulder shaft) configurations to match your housing design and axial retention requirements.
| Module | 1 (1 mm/tooth pitch) |
|---|---|
| Material | 304 Stainless Steel |
| Worm Gear Wheel Tooth Count | 15 / 20 / 25 / 30 / 35 / 40 / 50 / 60 Tooth |
| Worm Shaft Type | Type A / Type B |
| Bore Diameter (Wheel) | 5 mm – 12 mm (0.20 – 0.47 in) |
| Bore Diameter (Shaft) | 6 mm – 10 mm (0.24 – 0.39 in) |
| Pitch Diameter | 1.000 in (25.4 mm) |
| Pressure Angle | See variant options |
| Lead Angle | See variant options |
| Overall Shaft Length | See variant options |
| Finish | Natural stainless (uncoated) |
| Quantity per Order | 1 pcs |
The tooth count of the worm gear wheel equals the gear ratio when paired with a single-start worm shaft. For example, a 30-tooth wheel gives a 30:1 reduction. Choose a higher tooth count for more torque and slower output speed; choose a lower count (e.g., 15T) for faster output with less torque multiplication. Match the ratio to your motor speed and required output RPM.
Yes — all worm shafts and worm gear wheels in this listing share the same module 1 standard and are designed to mesh as a matched set. Ensure you select a compatible bore size for each component to fit your motor shaft and output axle.
Type A worm shafts feature plain (straight) shaft ends on both sides, suitable for standard bearing housings and flexible couplings. Type B worm shafts have a stepped or shouldered end profile, which aids axial retention and simplifies assembly in housings that require a positive stop. Select based on your housing and coupling design.
Worm drives with a low lead angle (typical for single-start, module 1 worms) exhibit natural back-drive resistance, meaning the output shaft cannot easily back-drive the worm. This makes them suitable for lift and positioning applications. However, self-locking behavior depends on the specific lead angle, lubrication, and load — it should not be relied upon as a safety brake without engineering verification.
Select the bore size that matches your motor output shaft or drive axle diameter. Available bore sizes for worm gear wheels are 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm. Worm shafts are available in 6 mm, 8 mm, and 10 mm bore sizes. If your shaft is slightly undersized, a keyway and set screw arrangement can compensate — check your housing design before ordering.
304 stainless steel offers solid resistance to oxidation and mild corrosion in humid, wet, or light-chemical environments. It is suitable for indoor automation, humid workshops, and light-duty outdoor enclosures. For highly corrosive or marine environments, 316 stainless steel would be a stronger choice. These gears are uncoated, so the natural stainless surface is the protective layer.
Yes. Module 1 worm gear sets are commonly used in DIY CNC z-axis drives, rotary axis attachments, and extruder gear reduction stages. The self-locking characteristic is particularly useful for z-axis applications where you want the axis to hold position when the motor is de-energized. Verify the bore size matches your stepper motor shaft (typically 5 mm or 8 mm for NEMA 17/23 motors).
Lubrication is recommended for sustained operation to reduce friction and wear at the worm-wheel mesh interface. A light gear grease or lithium-based grease applied to the worm thread and wheel teeth is suitable for most hobby and light industrial applications. For high-speed or continuous-duty use, consult a lubrication engineer for the appropriate viscosity grade.
