1.5 Modulus Blue Nylon Spur Gear, Flat Gears 12 to 100 Teeth, 6mm/8mm/10mm Bore

Divide the number of teeth on the driven gear by the number of teeth on the driving gear to get your reduction ratio. For example, pairing a 20-tooth driver with a 60-tooth driven gear gives a 3:1 reduction. Use our 12–100 tooth range to achieve ratios from roughly 1:1 up to about 8:1 in a single stage.

Measure your motor or drive shaft diameter with calipers. Select 6 mm bore for shafts up to 6 mm, 8 mm for shafts up to 8 mm, and 10 mm for shafts up to 10 mm. If your shaft is metric and falls between sizes, a keyway or set-screw collar can compensate for minor gaps — but an exact match is always recommended for best torque transfer.

PA nylon spur gears are well-suited for light-to-moderate torque applications such as robotics, 3D printer drives, small conveyors, and educational mechanisms. They are not recommended for high-torque industrial drives or applications with sustained shock loads. If your application exceeds moderate loads, consider metal spur gears instead.

Nylon (PA) has good resistance to moisture and mild chemicals, making it suitable for humid workshop environments. Note that prolonged water immersion can cause slight dimensional swelling in nylon; for fully submerged or high-humidity continuous-duty applications, verify dimensional tolerances after conditioning.

Yes. Nylon-on-steel or nylon-on-aluminum meshing is a common design choice that reduces overall system noise and protects the more expensive metal gear from wear. Ensure both gears share the same module (1.5M) and pressure angle (20°) for correct meshing.

Module (M) is the metric standard for gear tooth size: Module = Pitch Circle Diameter ÷ Number of Teeth. These gears are Module 1.5. To confirm compatibility with your existing gears, verify they are also rated 1.5M with a 20° pressure angle. Imperial diametral pitch (DP) gears are not directly compatible with metric module gears.

Nylon is self-lubricating under light loads, so no grease is required for typical DIY use. For higher-speed or higher-load applications, a small amount of dry PTFE lubricant or light machine oil on the tooth flanks can extend service life without attracting dust the way heavy grease does.