Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a loose or mismatched pinion gear causes slippage, noise, or premature wear in your build, the fix starts with a correctly specified 0.5 module brass spur gear. Hobbyists, robotics engineers, and small-machine builders who need a dependable 32-tooth transmission gear with a precise bore fit will find this component ready to drop into their drivetrain without modification.
Each gear is machined from solid brass, offering a balance of machinability, moderate corrosion resistance, and low-friction meshing. The module is 0.5 (metric), tooth count is 32T, and bore options span 4 mm to 10 mm (approximately 0.157 in to 0.394 in), covering the most common motor shaft diameters used in compact drive applications. Overall gear diameter is typically 16–17 mm (~0.63–0.67 in) depending on bore and addendum geometry.
Typical use cases include RC car transmission pinion replacement, servo-driven robotic arm joints requiring a 0.5 mod 32-tooth spur gear, and small CNC or automation gearbox stages where a brass pinion gear with a 4 mm to 10 mm bore is specified. Available in packs of 1, 2, 5, or 10 pieces for prototyping through small-batch production.
| Module | 0.5 (Metric) |
|---|---|
| Tooth Count | 32T |
| Bore Diameter | 4 / 5 / 6 / 6.35 / 7 / 8 / 10 mm — See variant options |
| Pitch Diameter | ~16 mm (~0.63 in) |
| Pressure Angle | 20° (standard) |
| Material | Brass |
| Finish | Natural brass (uncoated) |
| Gear Type | Spur (straight tooth) |
| Face Width | See variant options |
| Hub / Boss | See variant options |
| Keyway / Set Screw | See variant options |
| Pack Quantity | 1 / 2 / 5 / 10 PCS — See variant options |
The critical parameter is the module. This gear is Module 0.5 (metric). Any mating spur gear, rack, or pinion must also be Module 0.5 for correct tooth engagement. Tooth count affects gear ratio, not meshing compatibility — so a 0.5 Mod gear with any tooth count will mesh with this 32T gear as long as the module matches.
Measure your motor or drive shaft diameter with calipers. Available bores are 4, 5, 6, 6.35, 7, 8, and 10 mm. The 6.35 mm bore corresponds to a 1/4-inch shaft, common in North American hobby motors. Select the bore that matches your shaft — a loose fit will cause runout and noise; a tight fit requires careful pressing or a set screw.
Brass is well-suited for low-to-medium torque applications such as RC car pinions, servo-driven joints, and light automation stages. It offers quieter operation and easier machining than steel. For high-torque or high-RPM industrial drives, a steel or hardened alloy gear may be more appropriate. If you are unsure about load requirements, contact us to confirm suitability.
Brass has moderate natural corrosion resistance and performs well in typical indoor and light outdoor conditions. It is not recommended for continuous immersion in water or highly corrosive chemical environments. For marine or wet-environment applications, consider applying a light gear lubricant to extend service life.
Yes — this is one of the most common use cases. Verify that your RC car's spur gear is Module 0.5 and that the motor pinion shaft diameter matches one of the available bore sizes (4–10 mm). The 32-tooth count will determine your final drive ratio in combination with your spur gear tooth count.
Pinion gears are wear items, especially in high-cycle applications like RC racing or repetitive robotic movements. Ordering a 5- or 10-pack ensures you have spares on hand for quick replacement without waiting for reshipment. Multi-packs also offer a lower per-unit cost compared to single-piece orders.
Set screw and keyway availability varies by variant. Please check the variant detail or contact us to confirm the shaft retention method for your selected bore size before ordering.
