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When your motor drive system demands tight mesh tolerances and consistent torque transfer, a poorly matched gear becomes the weakest link. Engineers, robotics builders, and RC hobbyists who need a compact 60-tooth spur gear with a reliable bore fit will find this 0.5 module brass pinion gear engineered for exactly that purpose.
This gear is machined from brass, offering a balance of machinability, moderate corrosion resistance, and low-noise meshing characteristics. The module is 0.5 (Mod 0.5), with 60 teeth and a pitch diameter of 30 mm (approximately 1.18 in). Bore options range from 4 mm to 15 mm (approximately 0.16 in to 0.59 in), covering the most common motor shaft diameters in this class. Overall gear width is typically 5–8 mm depending on bore variant.
Typical use cases include: small DC motor gearboxes in robotics and automation rigs requiring a 0.5 mod 60T reduction stage; RC car and truck transmission pinion replacement where a brass gear reduces noise versus steel; and precision instrument drives, camera pan/tilt mechanisms, and DIY CNC axis drives where low backlash and smooth tooth profile are critical.
Standard 0.5 module, 60-tooth profile ensures direct interchangeability with any Mod 0.5 gear system. Pitch diameter 30 mm for predictable gear ratio calculations.
Brass alloy provides smooth meshing, reduced operating noise, and adequate corrosion resistance for indoor and light-duty outdoor applications without lubrication-heavy maintenance.
Eight bore sizes (4, 5, 6, 8, 10, 12, 14, 15 mm) cover the most common small motor shaft diameters, eliminating the need for custom boring in most applications.
Precision-cut involute tooth form minimizes backlash and ensures smooth, consistent power transmission across the full rotation cycle.
Available in 1, 2, or 5-piece packs. Multi-piece packs offer per-unit savings for prototyping runs, spare parts inventory, or multi-axis builds.
Conforms to standard Mod 0.5 DIN/ISO gear geometry, making it a direct drop-in replacement for worn or damaged pinion gears in existing drive trains.
| Module | 0.5 |
|---|---|
| Number of Teeth | 60T |
| Pitch Diameter | 30 mm (1.18 in) |
| Pressure Angle | 20° |
| Bore Diameter | 4 / 5 / 6 / 8 / 10 / 12 / 14 / 15 mm — See variant options |
| Gear Width (Face Width) | Typically 5–8 mm (0.20–0.31 in) |
| Material | Brass |
| Finish | Natural brass (uncoated) |
| Gear Type | Spur gear (external) |
| Tooth Profile | Involute |
| Pack Quantity | 1 PCS / 2 PCS / 5 PCS — See variant options |
| Application | Motor pinion, transmission, robotics, RC, CNC |
Measure your motor shaft diameter with a caliper. Select the bore size that matches exactly — for example, a 5 mm shaft requires the Bore 5 mm variant. A bore that is too large will cause shaft slippage; a bore that is too small will not fit. If your shaft has a flat (D-cut), you will need to add a set screw or use a shaft collar after fitting.
Any standard Mod 0.5 external spur gear will mesh correctly with this gear, regardless of tooth count. You can also mesh it with a Mod 0.5 rack for linear motion. Ensure the mating gear shares the same module (0.5) and pressure angle (20°) for proper engagement.
Brass is well-suited for light-to-medium duty applications such as robotics, RC vehicles, camera rigs, and small automation systems. It offers lower noise than steel-on-steel meshing and adequate strength for torque loads typical of small DC and stepper motors. For heavy-load or high-RPM industrial applications, a steel or hardened alloy gear may be more appropriate.
Brass has moderate natural corrosion resistance and performs well in dry indoor environments. For occasional light moisture exposure, a thin coat of machine oil or grease on the gear teeth is sufficient. Avoid prolonged exposure to saltwater or highly acidic environments without additional protective coating.
Gear ratio = driven teeth ÷ driver teeth. For example, pairing this 60T gear (driven) with a 12T pinion (driver) gives a 5:1 reduction ratio — the output shaft turns once for every 5 motor shaft rotations, multiplying torque by 5× while reducing speed proportionally. Adjust the driver tooth count to achieve your target ratio.
Brass-on-brass or brass-on-plastic meshing can run dry for low-speed, low-load applications. For extended service life and reduced wear, applying a light machine grease or PTFE-based lubricant to the tooth faces is recommended, especially at higher speeds or under continuous duty cycles.
Yes — the 5-piece pack offers a lower per-unit cost compared to single-piece pricing, making it ideal for prototyping multiple axis configurations, stocking spares, or building multi-motor drive systems. The 2-piece pack is a good middle option for dual-motor setups or a primary gear plus one spare.
