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When a right-angle power transfer is the only option and metal gears are too loud, too heavy, or too corrosive for the job, engineers and makers reach for nylon bevel gears. These Module 2 straight bevel gears are designed for hobbyists, robotics builders, and light-industrial automation teams who need a reliable 90° 1:2 speed-reduction mesh without the noise or weight penalty of steel.
Each set pairs a 20-tooth pinion with a 40-tooth gear, both machined from engineering-grade nylon (PA66 or equivalent) and finished in blue for easy identification. The gears are available with bore sizes ranging from 12 mm to 25 mm (approximately 0.47 in to 0.98 in), each paired with a matching keyway slot — from a 4 mm keyway on the 12 mm bore up to an 8 mm keyway on the 24–25 mm bore — for positive shaft locking without set-screw slip.
Typical use cases include 3D printer Z-axis right-angle drives, CNC router auxiliary axes, conveyor corner-turn assemblies, and DIY go-kart or e-bike differential builds where a nylon module 2 bevel gear 90 degree drive reduces drivetrain noise and eliminates corrosion concerns in damp or outdoor environments.
| Gear Module | Module 2 (Mod 2) |
|---|---|
| Mesh Angle | 90° |
| Ratio | 1:2 (20T pinion : 40T gear) |
| Tooth Count Options | 20 Tooth / 40 Tooth |
| Bore Size Range | 12 mm – 25 mm (0.47 in – 0.98 in) |
| Keyway Size | 4 mm (12 mm bore) / 5 mm (14–16 mm bore) / 6 mm (18–22 mm bore) / 8 mm (24–25 mm bore) |
| Material | Engineering Nylon (PA66-class) |
| Colour | Blue |
| Tooth Profile | Straight bevel |
| Pack Quantity | See variant options |
| Outer Diameter (20T) | See variant options |
| Outer Diameter (40T) | See variant options |
| Weight per Piece | See variant options |
The 20-tooth gear is the pinion (driver) and the 40-tooth gear is the driven wheel. They are sold as a matched 1:2 ratio pair. If you need to replace only one gear in an existing set, select the tooth count that matches the gear you are replacing. For a complete new drive, order one of each or select a multi-piece pack that includes both.
Measure your shaft diameter precisely with a calliper. Select the bore size that matches your shaft — for example, a 16 mm shaft requires the "16mm + 5mm Keyway" option. The keyway dimension is fixed per bore size, so also confirm your shaft has a matching keyway slot cut to the correct width and depth before ordering.
Yes. Module 2 is a standardised tooth profile, so these nylon gears will mesh correctly with any Module 2 steel or metal bevel gear of the same tooth count at 90°. In mixed-material pairings the nylon gear typically acts as the sacrificial wear component, which is often desirable to protect a more expensive metal shaft or housing.
Nylon has inherent self-lubricating properties and can run dry in light-load, low-speed applications. For continuous-duty or higher-load use, a light application of PTFE-based dry lubricant or white lithium grease on the tooth flanks will extend service life. Avoid petroleum-based oils that may swell or degrade nylon over time.
Exact torque ratings depend on operating speed, temperature, and lubrication. As a conservative guideline, Module 2 nylon bevel gears in this size range are typically suited for light-duty applications up to approximately 1–3 Nm at moderate speeds (under 500 RPM). For higher torque requirements, consider steel bevel gears. Contact us to confirm suitability for your specific application.
Yes. Nylon does not rust or corrode, making these gears a reliable choice for damp workshops, outdoor enclosures, and food-adjacent machinery where metal gears would require frequent maintenance. Note that prolonged exposure to standing water or UV radiation may gradually affect dimensional stability; a protective housing is recommended for long-term outdoor installations.
Each variant listing covers a specific tooth count (20T or 40T), bore size, and quantity. You can order either gear individually by selecting the corresponding Models option. If you need a complete matched set, add one 20-tooth variant and one 40-tooth variant with matching bore sizes to your cart, or use a multi-piece pack for the same bore size.
