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When your build demands a right-angle power transfer without the noise and weight of metal gearing, finding a bevel gear that fits your shaft precisely — and stays corrosion-free in damp or chemical environments — is a real challenge. These Module 2 straight bevel gears are designed for engineers, hobbyists, and machine builders who need a reliable 90° 1:1 transmission component that installs cleanly and runs quietly.
Each gear is machined from engineering-grade nylon in a distinctive blue finish. The module 2 tooth profile spans 20, 25, and 30 tooth counts, with bore sizes ranging from 10mm to 25mm (approximately 0.39" to 0.98"). Keyway options (4mm and 6mm) are available on most bore sizes to prevent shaft slippage under load. Tooth face width is typically 12–18mm depending on tooth count.
Typical use cases include DIY CNC router axis drives requiring low-vibration 90° redirection, robotics joint assemblies where weight reduction is critical, and light industrial conveyor corner drives where metal gears would corrode or generate unacceptable noise levels.
Engineering-grade nylon dampens gear mesh vibration, delivering significantly quieter operation than metal equivalents — ideal for office equipment, robotics, and noise-sensitive environments.
Nylon's low density reduces rotating mass compared to steel or brass gears, improving dynamic response in servo-driven and battery-powered systems.
Nylon resists moisture, mild acids, and many solvents — suitable for food-adjacent machinery, outdoor enclosures, and humid workshop environments where metal gears would degrade.
Straight bevel tooth profile machined to Module 2 standard ensures accurate 90° shaft intersection with 1:1 speed ratio — no speed change, just direction change.
Most bore sizes include a precision keyway (4mm or 6mm) to lock the gear to the shaft under torque, preventing rotational slip during operation.
Order 1 to 5 pieces per variant to stock spares or build complete mating pairs in a single transaction — quantity pricing reflects per-unit savings at higher counts.
| Gear Type | Straight Bevel Gear |
|---|---|
| Module | 2 |
| Shaft Angle | 90° |
| Gear Ratio | 1:1 |
| Tooth Count | 20T / 25T / 30T (see variant options) |
| Bore Diameter | 10mm – 25mm (0.39" – 0.98") — see variant options |
| Keyway | 4mm (for 12mm bore) / 5mm (for 14–17mm bore) / 6mm (for 18–25mm bore) / None (10mm bore) |
| Material | Engineering-grade nylon |
| Color / Finish | Blue |
| Tooth Face Width | Typically 12–18mm depending on tooth count |
| Outer Diameter | See variant options |
| Weight (per piece) | See variant options |
| Quantity per Order | 1 / 2 / 3 / 4 / 5 pcs (see variant options) |
For a 1:1 ratio drive, both mating gears must have the same tooth count. Choose 20T for compact, space-constrained assemblies; 25T for a balance of torque capacity and size; and 30T when you need higher torque transmission or a larger pitch diameter. Match the tooth count across both gears in your pair.
Measure your shaft diameter precisely with calipers. Select the bore size that matches your shaft. If your shaft has a keyway cut, select the matching keyway variant (4mm, 5mm, or 6mm). The 10mm bore variant has no keyway — use a set screw or adhesive retainer if needed for that size.
Nylon gears have lower load capacity than steel or brass but are well-suited for light-to-medium duty applications — typically up to a few Newton-meters of torque at moderate speeds. They excel where noise reduction, weight savings, and corrosion resistance outweigh the need for maximum load capacity. For heavy industrial drives, metal gears are recommended.
Yes. Engineering-grade nylon does not rust and resists moisture, mild acids, and many common solvents. It is suitable for humid workshops, outdoor enclosures, and food-adjacent machinery where metal gears would corrode. Avoid prolonged exposure to strong oxidizing acids or high-temperature steam.
Yes. A bevel gear drive requires two mating gears. Both must be Module 2 with the same tooth count for a 1:1 ratio. Select your required bore size independently for each gear to match your two shaft diameters, which may differ. Use the Amount option to order 2 or more pieces in a single variant if both shafts share the same bore size.
Engineering-grade nylon typically operates reliably between -30°C and +100°C (-22°F to +212°F). Sustained temperatures above 100°C may cause dimensional changes or reduced strength. For high-temperature environments, consider metal gear alternatives.
Nylon has inherent self-lubricating properties, so these gears can run dry in many light-duty applications. For higher speeds or loads, a light application of PTFE-based or silicone grease can extend service life. Avoid petroleum-based greases that may degrade nylon over time.
