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When a compact drive system demands reliable torque transfer in a tight footprint, finding a matched worm gear set with consistent bore sizing and material options can be a real challenge. Engineers, robotics hobbyists, and automation makers who need a dependable Mod 0.5 worm gear wheel and shaft combination will find this set covers the most common configurations in one listing.
This listing includes brass worm wheels (20, 25, 30, 35, 40, 50, and 60 tooth) and worm shafts in C45 carbon steel or stainless steel (Type A, Type B, and Type L). Bore sizes range from 4 mm (~0.157 in) to 6 mm (~0.236 in). Wheel outer diameter varies by tooth count, typically 14–36 mm (0.55–1.42 in) for the 20T–60T range at Mod 0.5.
Typical use cases include small robotic joint actuators requiring a self-locking worm drive, compact conveyor indexing mechanisms where a Mod 0.5 brass worm gear wheel reduces backlash, and DIY CNC or camera pan-tilt rigs where a stainless steel worm shaft resists corrosion in humid environments.
Available in 20, 25, 30, 35, 40, 50, and 60 tooth configurations machined from brass for smooth meshing, low friction, and corrosion resistance in light-duty drive applications.
Worm shafts offered in C45 carbon steel (Type B) for cost-effective strength, and stainless steel (Type A, Type B, Type L) for environments requiring oxidation resistance.
Three bore diameter options allow direct mounting on common small motor and shaft sizes without additional machining in most standard configurations.
Mod 0.5 single-start worm geometry provides inherent self-locking behavior under typical load conditions, useful for positioning systems that must hold position without a brake.
Order 1, 2, 3, 4, 5, or 10 pieces per variant to match prototyping, small-batch production, or spare-parts stocking needs without over-ordering.
Both worm wheels and worm shafts are listed together, making it straightforward to source a matched Mod 0.5 worm gear set from a single order.
| Module (Mod) | 0.5 |
|---|---|
| Worm Wheel Material | Brass |
| Worm Shaft Material | C45 Carbon Steel / Stainless Steel (see variant options) |
| Number of Teeth (Wheel) | 20 / 25 / 30 / 35 / 40 / 50 / 60 (see variant options) |
| Shaft Type | Type A / Type B / Type L (see variant options) |
| Bore Diameter | 4 mm / 5 mm / 6 mm (see variant options) |
| Pitch Diameter (Wheel) | See variant options |
| Outer Diameter (Wheel) | See variant options |
| Unit Weight | See variant options |
| Quantity per Order | 1 / 2 / 3 / 4 / 5 / 10 pcs (see variant options) |
| Drive Type | Worm & Worm Wheel |
| Application | Robotics, automation, DIY drives, CNC, pan-tilt rigs |
The tooth count determines your gear ratio. For a single-start worm shaft, the ratio equals the number of teeth on the worm wheel. For example, a 20-tooth wheel gives a 20:1 ratio, while a 60-tooth wheel gives 60:1. Choose a higher tooth count for more torque multiplication and slower output speed, and a lower count for faster output with less torque reduction.
Match the bore diameter to your motor or drive shaft diameter. Available bores are 4 mm, 5 mm, and 6 mm. If your shaft is slightly undersized, a set screw or keyway adapter can be used, but for best concentricity, select the bore that matches your shaft exactly. The Type L worm shaft does not have a selectable bore size in this listing.
Brass worm wheels at Mod 0.5 are suited for light-to-medium duty applications such as robotics joints, camera rigs, and small automation mechanisms. They are not recommended for heavy industrial loads or continuous high-torque operation. For demanding environments, consider pairing with a stainless steel worm shaft to reduce wear at the mesh interface.
Yes. The stainless steel shaft variants (Type A, Type B, Type L) offer significantly better oxidation and moisture resistance compared to C45 carbon steel. They are suitable for humid environments, outdoor enclosures, or applications where periodic cleaning with mild solvents is required. C45 steel shafts are more economical and appropriate for dry, indoor use.
They are listed separately by model in the variant selector. You can add both a worm wheel variant and a worm shaft variant to your cart in the same order. Ensure both are Mod 0.5 and that the shaft type is compatible with your housing or mounting arrangement before ordering.
Type A and Type B refer to different shaft end configurations — typically differing in shaft extension length or end treatment. Type L is a longer shaft variant. Exact dimensional drawings are not included in this listing; if precise shaft geometry is critical for your design, contact us to confirm dimensions before ordering.
Mod 0.5 single-start worm drives are generally self-locking under static load conditions, meaning the output shaft cannot back-drive the worm. This makes them useful for positioning systems, lifts, and actuators that need to hold position without power. However, self-locking behavior depends on friction conditions and load; always verify with your specific application before relying on it as a safety-critical feature.
