Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a metal gear is overkill and a generic plastic gear won't hold tolerance, makers and engineers reach for a nylon spur gear that balances strength, weight, and quiet operation. Whether you're building a compact robot arm, upgrading a 3D printer extruder drive, or prototyping a custom gearbox, the right bore fit is critical — and this stepped-bore design gives you exactly that flexibility.
This listing covers a Module 1 (1M), 25-tooth blue nylon spur gear with a stepped hub. The gear body is machined from engineering-grade nylon (PA66 or equivalent), offering a pitch diameter of 25 mm (≈ 0.98 in) and an overall gear width typically in the range of 10–15 mm (≈ 0.39–0.59 in). Bore options span 5 mm, 6 mm, 6.35 mm (1/4 in), 7 mm, 8 mm, 10 mm, and 12 mm to suit standard motor shafts and drive axles. The stepped hub provides a shoulder for secure axial positioning without additional collars.
Typical use cases include low-noise spur gear drives in desktop CNC machines, lightweight gear trains in educational robotics kits, and replacement pinion gears in small automation equipment where a 1 mod 25 tooth nylon gear reduces backlash noise compared to metal alternatives.
Made from PA66-grade nylon for reliable mechanical strength, low friction, and resistance to wear — suitable for continuous-duty light-load applications.
1M tooth profile meshes precisely with any other Module 1 gear, rack, or pinion, making integration into existing gear trains straightforward.
The stepped hub design provides a positive axial shoulder, reducing the need for additional shaft collars and simplifying assembly in tight spaces.
Nylon's inherent self-lubricating properties reduce operational noise and eliminate the need for frequent re-greasing in most light-duty drive applications.
Available in 1, 2, 5, or 10-piece packs — order exactly what your project requires without overstocking or paying single-unit pricing on bulk needs.
Seven bore sizes (5, 6, 6.35, 7, 8, 10, 12 mm) cover the most common motor shaft diameters used in robotics, automation, and maker projects.
| Module | 1 (1M) |
|---|---|
| Number of Teeth | 25T |
| Pitch Diameter | 25 mm (≈ 0.98 in) |
| Pressure Angle | 20° |
| Gear Width (Face Width) | See variant options |
| Bore Diameter Options | 5 mm / 6 mm / 6.35 mm / 7 mm / 8 mm / 10 mm / 12 mm |
| Hub Style | Stepped hub |
| Material | Engineering nylon (PA66 or equivalent) |
| Color | Blue |
| Gear Type | Spur gear (external) |
| Packing Quantity | 1 / 2 / 5 / 10 PCS (select above) |
| Weight (per piece) | See variant options |
Module (M) is the standard metric measurement of gear tooth size. Module 1 means the pitch diameter equals the number of teeth in millimeters — so a 25-tooth Module 1 gear has a 25 mm pitch diameter. Two gears must share the same module to mesh correctly. This gear will mesh with any other 1M spur gear, rack, or pinion.
Measure your motor or drive shaft diameter with calipers. Select the bore that matches exactly — for example, a 6.35 mm bore fits a standard 1/4-inch shaft. The stepped hub provides axial positioning; you may also use a set screw or adhesive for additional retention depending on your torque requirements.
Engineering nylon (PA66) is well-suited for light-to-medium duty applications such as 3D printer drives, small robotics, educational kits, and low-torque automation. It is not recommended for high-torque, high-temperature (above ~120°C / 248°F), or heavy shock-load environments where metal gears would be more appropriate.
Nylon has good resistance to oils, greases, and mild chemicals, and it does not rust or corrode like metal. However, PA66 can absorb moisture over time, which may cause slight dimensional changes. For outdoor or high-humidity environments, ensure the gear is protected or consider a moisture-stabilized nylon grade.
Yes. Module 1 is a standardized tooth profile, so this nylon gear will mesh correctly with any metal or plastic Module 1 spur gear or rack with a matching 20° pressure angle. Pairing a nylon gear with a metal pinion is a common technique to reduce noise and wear on the softer gear as a sacrificial element.
For prototyping or single-axis builds, 1 or 2 PCS is typically sufficient. For multi-axis machines, production runs, or to keep spares on hand, the 5 or 10 PCS packs offer better per-unit value. Select your preferred quantity using the "Packing QTY" option above before adding to cart.
Nylon is self-lubricating under most light-duty conditions and typically does not require grease or oil for normal operation. If used in higher-speed or higher-load applications, a small amount of dry PTFE lubricant or light machine oil can extend service life without degrading the nylon material.
