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When a motion-control project demands a compact right-angle drive that won't slip under load, engineers and makers reach for a matched worm gear set. This listing covers Module 1 worm gear wheels (15 / 20 / 25 / 30 / 35 / 40 / 50 / 60 tooth) and worm shafts (Type B short-body and Type L long-body), all machined from C45 medium-carbon steel for consistent tooth geometry and dependable torque transfer.
Each worm gear wheel is a single-start, Module 1 helical-tooth ring with a precision-bored center hole ranging from 5 mm (0.197 in) to 15 mm (0.591 in). The matching worm shafts share the same Module 1 pitch and are available with bore sizes from 5 mm to 10 mm. Tooth counts span 15 to 60, giving reduction ratios from 15:1 up to 60:1 when paired with a single-start worm shaft.
Typical applications include DIY CNC router Z-axis drives, small conveyor indexing tables, robotic joint actuators requiring self-locking behavior, and laboratory automation equipment where a compact right-angle gearbox is needed without a full gearbox housing.
Machined from C45 steel for a balance of machinability and mechanical strength, supporting sustained torque loads in continuous-duty drive applications.
Standardized Module 1 geometry ensures consistent tooth contact across all wheel and shaft combinations in this series, simplifying replacement and prototyping.
Bore options from 5 mm (0.197 in) to 15 mm (0.591 in) accommodate common motor shaft and axle diameters used in hobby, maker, and light industrial builds.
Choose from 15, 20, 25, 30, 35, 40, 50, or 60 tooth wheels to achieve reduction ratios from 15:1 to 60:1 with a single-start worm shaft.
The low lead angle of a single-start Module 1 worm provides inherent back-drive resistance, useful for vertical lifts, positioning tables, and valve actuators that must hold position without a brake.
Available in packs of 1 to 5 pieces per order, with per-unit pricing that decreases at higher quantities — convenient for prototyping single units or stocking small production runs.
| Gear Type | Worm Gear Wheel / Worm Shaft |
|---|---|
| Module | 1 |
| Material | C45 Medium-Carbon Steel |
| Worm Wheel Tooth Count | 15 / 20 / 25 / 30 / 35 / 40 / 50 / 60 (see variant options) |
| Worm Shaft Type | Type B (short body) / Type L (long body) |
| Bore Diameter | 5 mm / 6 mm / 8 mm / 10 mm / 12 mm / 14 mm / 15 mm (see variant options) |
| Pitch Diameter | See variant options |
| Pressure Angle | 20° |
| Starts (Worm) | 1 (single-start) |
| Surface Finish | Machined, natural steel |
| Quantity per Order | 1 / 2 / 3 / 4 / 5 pcs (see variant options) |
| Weight | See variant options |
The tooth count of the worm wheel equals the gear reduction ratio when paired with a single-start worm shaft. For example, a 30-tooth wheel with a single-start shaft gives a 30:1 reduction. Choose a higher tooth count for more torque and slower output speed; choose a lower count (e.g., 15 tooth) for faster output with less torque multiplication. Match the tooth count to your required output RPM and torque based on your motor specs.
The bore diameter must match your motor shaft or drive axle diameter. Common motor shaft sizes are 5 mm, 6 mm, 8 mm, and 10 mm. Measure your shaft with calipers before ordering. If you plan to use a set screw or keyway, confirm the hub wall thickness is sufficient for your bore size — larger bores on smaller-tooth wheels leave less hub material.
Type B is a shorter-body worm shaft suited for compact gearbox housings where axial space is limited. Type L is a longer-body shaft that provides more bearing surface and is preferred when the shaft must span a wider housing or when additional support bearings are required. Both share the same Module 1 tooth geometry and mesh with all worm wheels in this listing.
C45 carbon steel is not inherently corrosion-resistant. In humid or wet environments, apply a light machine oil or grease to the tooth surfaces and bore after installation. For applications exposed to moisture continuously, consider adding a sealed housing or using a corrosion-inhibiting lubricant. Stainless steel alternatives are not available in this listing.
Yes, in most configurations. A single-start Module 1 worm gear set typically exhibits self-locking behavior, meaning the output (wheel) side cannot back-drive the input (worm shaft) side under static load. This is useful for vertical lifts and positioning tables. However, self-locking is not guaranteed under vibration or dynamic shock loads — always verify with your specific load and duty cycle before relying on self-locking as a safety mechanism.
Compatibility depends on the mating shaft sharing the same module (Module 1), pressure angle (20°), and lead angle. If the third-party shaft meets these parameters, meshing should be acceptable. However, tooth profile tolerances vary between manufacturers, so a test fit is recommended before committing to a production build. For guaranteed compatibility, use the matched worm shaft variants available in this listing.
A medium-viscosity gear oil (ISO VG 220 or equivalent) or a lithium-based grease is suitable for most low-to-medium speed applications. Apply lubricant to the worm thread and wheel teeth before first use. Re-lubricate periodically based on duty cycle — more frequent lubrication is needed in high-speed or high-load continuous operation. Avoid dry running, which accelerates tooth wear on carbon steel gears.
