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When your motion-control build demands a quiet, corrosion-resistant gear that won't add unnecessary mass to the drivetrain, finding the right module 1 spur gear in the correct tooth count and bore size can be a real bottleneck. Engineers, hobbyists, and small-batch manufacturers working on CNC routers, 3D printer extruder drives, and robotic arm joints need a reliable blue nylon spur gear that mates cleanly with standard Module 1 racks, pinions, and stepper motor shafts.
These Module 1 blue nylon spur gears are machined from engineering-grade nylon (PA) stock, giving them a characteristic blue color that makes alignment checks easy at a glance. Each gear covers a tooth range of 15T to 120T and a bore diameter of 4 mm to 16 mm (approximately 0.16 in to 0.63 in), with an outer diameter that scales proportionally — from roughly 17 mm (0.67 in) for the 15T up to approximately 122 mm (4.80 in) for the 120T. Face width is typically 10–15 mm (0.39–0.59 in) depending on tooth count.
Typical use cases include stepper motor pinion drives in desktop CNC routers, low-noise gear reduction stages in robotic arm joints, and lightweight power-transmission assemblies in automated dispensing or conveyor systems where metal gears would introduce excessive weight or electrical conductivity concerns.
Machined from PA nylon stock for a balance of tensile strength, flexibility, and chemical resistance — suitable for dry-running applications without lubrication.
Nylon's inherent damping properties reduce gear mesh noise compared to metal alternatives, making these gears well-suited for office-environment CNC machines and desktop robotics.
Available from 15T to 120T and bore diameters 4–16 mm, covering the majority of stepper motor shaft sizes and gear-ratio requirements in a single product family.
Nylon density is significantly lower than steel or brass, reducing rotational inertia — a measurable advantage in high-cycle stepper motor applications where acceleration matters.
Nylon does not rust or corrode in humid environments and is electrically non-conductive, making it safe for use near sensitive electronics and in moisture-prone enclosures.
Conforms to the international Module 1 gear standard, ensuring interchangeability with M1 racks, worm gears, and mating pinions from any compliant supplier.
| Module | 1 |
|---|---|
| Material | Engineering Nylon (PA) |
| Color | Blue |
| Tooth Count Range | 15T – 120T (see variant options) |
| Bore Diameter Range | 4 mm – 16 mm (see variant options) |
| Pressure Angle | 20° |
| Face Width | Typically 10–15 mm (varies by tooth count) |
| Outer Diameter | (Tooth Count + 2) × 1 mm — see variant options |
| Gear Type | Spur Gear (Pinion) |
| Packing Quantity | 1 Pc per order |
| Surface Finish | Machined, natural nylon |
| Operating Temperature | Typically –30°C to +90°C (–22°F to +194°F) |
Select the tooth count based on your required gear ratio. Divide the driven gear teeth by the driving gear teeth to get the ratio. For example, pairing a 15T pinion with a 60T gear gives a 4:1 reduction. Use a higher tooth count for larger pitch diameter and smoother torque transmission at lower speeds.
Measure your motor or shaft diameter precisely with calipers. Common stepper motor shaft sizes are 5 mm (NEMA 17) and 6.35 mm / 8 mm (NEMA 23). Choose the bore that matches your shaft — a bore that is too large will cause slippage even with a set screw. If your shaft has a flat (D-shaft), confirm the gear has a set screw hole positioned to engage it.
Engineering nylon gears offer adequate strength for light-to-medium duty applications such as 3D printer drives, small CNC routers, and robotic joints operating at moderate torque. They are not recommended for high-torque, high-temperature, or heavy industrial applications where steel or brass gears are the appropriate choice. Nylon's advantage is low noise, self-lubrication, and corrosion resistance.
Yes. Nylon does not rust or oxidize, making it suitable for humid or mildly wet environments. However, nylon can absorb moisture over time, which may cause slight dimensional changes. For precision applications in very wet conditions, verify dimensional tolerances after acclimation or consider sealing the bore area.
Yes, as long as your existing rack or mating gear is also Module 1 (M1) with a 20° pressure angle, these gears will mesh correctly. Module 1 is an international standard, so M1 components from different suppliers are interchangeable. Do not mix with Module 0.8, Module 1.25, or other module sizes — they will not mesh properly.
Nylon gears are self-lubricating and can run dry in most light-duty applications. For extended service life under continuous or high-cycle operation, a light application of PTFE-based dry lubricant or white lithium grease is recommended. Avoid petroleum-based oils that may degrade nylon over time.
The available bore sizes (4, 5, 6, 7, 8, 10, 12, 14, 15, 16 mm) cover the most common stepper motor shaft diameters: 5 mm for NEMA 17, 6.35 mm (1/4 in) and 8 mm for NEMA 23, and 10–14 mm for larger NEMA 34 motors. Always verify your specific motor's shaft diameter in its datasheet before selecting a bore size.
