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When your robotics project, CNC build, or motorized mechanism demands a gear that won't corrode, won't add unnecessary weight, and won't break the budget, finding the right module 1 spur gear in the correct bore size can be frustrating. This blue nylon pinion gear is designed for makers, hobbyists, and engineers who need a reliable, low-noise transmission component that fits standard stepper motor shafts straight out of the package.
Each gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a good balance of rigidity and self-lubrication. The module is 1 (tooth pitch = 1 mm per tooth), with tooth counts ranging from 15 to 60 teeth and bore diameters from 5 mm (~0.197 in) to 12 mm (~0.472 in). Outside diameter scales with tooth count — from approximately 17 mm (0.67 in) for a 15T gear up to approximately 62 mm (2.44 in) for a 60T gear.
Typical use cases include stepper motor pinion gear assemblies in 3D printers and CNC routers, gear-reduction stages in small robotics and automation rigs, and replacement drive gears in RC vehicles, conveyor prototypes, and educational STEM kits — all scenarios where a lightweight nylon spur gear for stepper motor shafts outperforms heavier metal alternatives.
| Module | 1 (1 mm tooth pitch) |
|---|---|
| Material | Engineering nylon (PA66-type) |
| Color | Blue |
| Tooth Count Options | 15 / 16 / 18 / 20 / 22 / 24 / 25 / 28 / 30 / 32 / 35 / 40 / 50 / 60 Teeth |
| Bore Diameter Options | 5 mm / 6 mm / 7 mm / 8 mm / 10 mm / 12 mm |
| Outside Diameter (approx.) | (Tooth Count + 2) × 1 mm — e.g., 17 mm for 15T, 62 mm for 60T |
| Pressure Angle | 20° |
| Gear Type | Spur (straight tooth) |
| Hub / Face Width | See variant options |
| Max Recommended Speed | See variant options |
| Packing Quantity | 1 piece per order (select variant) |
The gear ratio between two meshing gears equals the ratio of their tooth counts. For example, pairing a 15T pinion with a 30T gear gives a 2:1 reduction. Decide your desired output speed or torque multiplication first, then select the tooth count that achieves that ratio with your mating gear.
Most NEMA 17 stepper motors have a 5 mm output shaft. Select the Bore 5 mm variant for a direct fit. If your motor has a 6.35 mm (1/4 in) shaft, choose Bore 6 mm and use a light press-fit or set-screw collar. Always measure your shaft diameter before ordering.
Engineering nylon spur gears are well-suited for light-to-medium duty applications such as 3D printer drives, small robotics, and educational mechanisms. They are not recommended for high-torque industrial drives or applications with sustained heavy shock loads, where steel or aluminum gears would be more appropriate.
Nylon is inherently resistant to moisture and mild corrosion, making it a reliable choice for indoor environments with humidity variation. Avoid prolonged immersion in water or exposure to strong solvents, which can cause dimensional changes over time.
Yes. As long as the mating gear is also Module 1 with a 20° pressure angle, nylon-to-metal meshing works correctly. In fact, pairing a nylon gear with a steel pinion is a common technique to reduce noise and provide a sacrificial wear component that protects the more expensive metal gear.
Nylon has natural self-lubricating properties, so light-duty applications often run dry without issue. For higher speeds or continuous-duty cycles, a small amount of dry PTFE lubricant or light grease can extend service life and further reduce noise.
The bore is machined to a close tolerance for the selected diameter. For a secure connection, use a set-screw hub collar, a shaft key (if your motor shaft has a keyway), or a light press-fit depending on your torque requirements. For very low-torque applications, friction fit alone may suffice.
