2 Module Plastic Nylon Spur Gear, Cylinder Flat Gears 12~50 Teeth, 6/8/10mm Bore

Select your gear ratio first: divide the driven gear tooth count by the driving gear tooth count to get the reduction ratio. For example, pairing a 2M 12-tooth pinion with a 2M 36-tooth gear gives a 3:1 reduction. Use smaller tooth counts for higher speed, larger counts for more torque. Confirm the resulting pitch-circle diameter fits within your chassis clearance before ordering.

Measure your motor or drive shaft diameter precisely with calipers. Choose the 6 mm bore for most NEMA 14 and small hobby stepper shafts, the 8 mm bore for NEMA 17 and mid-range stepper motors, and the 10 mm bore for larger NEMA 23 or servo output shafts. If your shaft has a keyway, verify the gear bore accommodates it or plan to add a set-screw collar.

These 2M plastic nylon spur gears are well-suited for light-to-medium duty applications such as 3D printer drives, robotic joints, educational automation rigs, and small conveyor mechanisms. They are not recommended for high-torque industrial drives, impact loads, or continuous operation above approximately 60 °C. For heavy-duty or high-temperature environments, consider metal module gears instead.

In most light-load applications, nylon's self-lubricating properties eliminate the need for grease or oil. For higher-speed or higher-load continuous runs, a small amount of dry PTFE lubricant or light silicone grease on the tooth flanks can extend service life. Avoid petroleum-based oils, which can degrade nylon over time.

Yes. These gears follow the standard 2M (Module 2, 20° pressure angle) tooth profile and will mesh correctly with any conforming 2M metal or plastic spur gear, pinion, or rack. When pairing with a metal gear, the nylon gear typically acts as the sacrificial wear component, which is often desirable to protect more expensive metal parts.

Order a single piece if you need one replacement gear or are prototyping a new design. Choose a 3-pack for multi-axis builds or when you want a spare on hand. The 5-pack offers the best per-unit value for production runs, classroom kits, or projects requiring matched gear sets across multiple assemblies.

Yes. Nylon (PA) has good resistance to water, mild alkalis, and many common solvents, making these cylinder flat gears suitable for humid workshop environments or light-duty food-adjacent machinery (non-food-contact). Avoid prolonged exposure to strong acids, concentrated bleach, or aromatic solvents, which can degrade nylon over time.