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When a noisy metal gear or a seized drive train brings your build to a halt, the culprit is often a mismatch between material and application. Makers, robotics engineers, and small-machine builders who need quiet, corrosion-free power transmission will find these nylon spur gears a reliable drop-in solution for low-to-medium torque drive systems.
Each gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a self-lubricating surface and excellent chemical resistance. Available in three standard metric modules — Module 1.5, Module 2, and Module 3 — with tooth counts ranging from 12 to 100 teeth. Outer diameters scale with module and tooth count, typically spanning 20 mm (0.79 in) for the smallest variants up to 306 mm (12.05 in) for the largest. Face width is typically 15–20 mm (0.59–0.79 in) depending on module.
Typical use cases include 3D printer extruder drives and Z-axis lead-screw gears, lightweight CNC router axis drives, small conveyor and indexing table mechanisms, educational robotics platforms, and RC vehicle gearbox prototyping — anywhere a quiet, lightweight spur gear for motor shaft is required.
Made from PA66-class nylon for a self-lubricating, low-friction surface that reduces wear on mating gears and eliminates the need for constant re-greasing in light-duty drives.
Available in Module 1.5, Module 2, and Module 3 — the most common metric gear modules — ensuring straightforward meshing with standard pinions, racks, and worm gears in your existing drivetrain.
Choose from 12 to 100 teeth to dial in your exact gear ratio. A broad selection in a single product listing means you can source both the driver and driven gear without switching suppliers.
Nylon's natural elasticity absorbs micro-shock loads and dampens gear mesh noise — a critical advantage in desktop CNC machines, 3D printers, and indoor robotics where acoustic comfort matters.
Unlike steel or cast-iron gears, nylon does not rust and resists mild oils, greases, and cleaning solvents — making these gears suitable for light food-adjacent machinery, humid workshops, and outdoor prototype rigs.
Nylon density is roughly one-seventh that of steel, reducing rotational inertia and allowing smaller motors to accelerate the drivetrain faster — a measurable benefit in high-cycle indexing and pick-and-place applications.
| Material | Engineering nylon (PA66-class), blue |
|---|---|
| Available Modules | Module 1.5 / Module 2 / Module 3 |
| Tooth Count Range | 12 – 100 teeth (see variant options) |
| Tooth Profile | Standard metric involute spur (DIN 867 / ISO 53) |
| Pressure Angle | 20° |
| Outer Diameter | See variant options |
| Bore Diameter | See variant options |
| Face Width | Typically 15–20 mm (0.59–0.79 in) depending on module |
| Finish / Color | Blue |
| Lubrication | Self-lubricating (dry running capable) |
| Operating Temperature | Typically –30 °C to +100 °C (–22 °F to +212 °F) |
| Application | CNC, robotics, 3D printers, automation, light conveyor drives |
The module must match between all meshing gears — a Module 2 gear will only mesh correctly with another Module 2 gear or rack. To find your gear ratio, divide the driven gear tooth count by the driver gear tooth count. For example, a 40-tooth gear driven by a 20-tooth pinion gives a 2:1 reduction. Select the module based on the torque load: Module 1.5 suits light loads (small motors, 3D printers), Module 2 handles moderate loads (desktop CNC), and Module 3 is appropriate for heavier drives.
Nylon gears are rated for low-to-medium torque applications. Exact load ratings depend on module, tooth count, speed, and operating temperature. As a conservative guideline, Module 1.5 gears are suitable for torques up to approximately 1–3 Nm at moderate RPM; Module 2 up to 3–8 Nm; Module 3 up to 8–20 Nm. For high-torque or high-speed continuous duty, consider steel or acetal gears instead.
Yes. Nylon does not rust and resists mild oils, greases, and water exposure. These gears are suitable for humid workshops, light outdoor prototype rigs, and environments where occasional moisture contact is expected. Avoid prolonged immersion in water or exposure to strong acids and bases, as nylon can absorb moisture over time, which may slightly affect dimensional tolerances.
Bore diameter varies by module and tooth count — please refer to the variant detail or contact us to confirm the bore size for your specific selection. Nylon is machinable, so the bore can be enlarged or keyed using standard metalworking tools if needed. Always confirm the bore fits your motor or shaft before ordering.
No — nylon is inherently self-lubricating and can run dry in most light-duty applications. For higher loads or speeds, a light application of PTFE-based or silicone grease can extend service life. Avoid petroleum-based greases that may degrade nylon over time.
Confirm three parameters: (1) Module — must match exactly; (2) Pressure angle — these gears use the standard 20° involute profile; (3) Bore diameter — must fit your shaft. If you are replacing an existing gear, measure the outer diameter and count the teeth, then calculate the module as: Module = Outer Diameter ÷ (Tooth Count + 2). Contact us if you need help confirming compatibility.
Yes — these are a popular choice for 3D printer extruder drives, Z-axis lead-screw gears, and lightweight CNC router axis drives. Module 1.5 gears are commonly used in extruder and small-axis applications, while Module 2 suits larger CNC axis drives. Their low noise and self-lubricating properties make them well-suited to desktop machine environments.
