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When your project demands a reliable right-angle power transfer without the weight or noise of metal gears, finding a bevel gear set that fits your exact shaft is a constant frustration. Hobbyists, robotics builders, and small-machine designers who need a compact 1:2 ratio drive solution will find these Module 1.5 nylon straight bevel gears a practical, drop-in answer.
Each gear is machined from engineering-grade nylon (PA), offering a self-lubricating, corrosion-resistant tooth profile. The module is 1.5, with tooth counts spanning 15 to 40 teeth across the available models, and bore sizes ranging from 6 mm (0.24 in) to 20 mm (0.79 in) — including keyway variants from 12 mm + 4 mm keyway up to 20 mm + 6 mm keyway for positive shaft locking. The blue color aids quick visual identification in multi-gear assemblies.
Typical use cases include DIY CNC axis drives requiring a low-noise 90° bevel gear set, tabletop robotics joints needing a lightweight nylon bevel gear pair, and small conveyor or automation rigs where a module 1.5 bevel gear with keyway bore eliminates set-screw slip under cyclic loads.
Made from PA (polyamide) nylon for a self-lubricating tooth surface that reduces friction and operating noise compared to metal alternatives — ideal for indoor automation and robotics.
Standardized M1.5 tooth geometry ensures accurate mesh with any other Module 1.5 bevel gear, giving you a predictable 1:2 speed reduction or 2:1 torque multiplication at a true 90° shaft angle.
Plain bore sizes from 6 mm to 15 mm suit standard motor and shaft diameters; keyway variants (12 mm + 4 mm KW through 20 mm + 6 mm KW) provide positive shaft engagement for higher-torque applications.
Nylon's low density keeps rotating mass minimal, reducing motor load during direction changes — a meaningful advantage in servo-driven robotics joints and CNC axis pivots.
Unlike steel gears, nylon resists moisture, mild chemicals, and oxidation, making these bevel gears suitable for humid workshop environments or lightly exposed outdoor enclosures.
Order a single gear for prototyping or up to 5 pieces for a production run — each quantity tier is priced to reflect volume savings, so you only pay for what your build actually needs.
| Module | 1.5 |
|---|---|
| Tooth Count (Models) | 15T, 18T, 20T, 30T, 36T, 40T |
| Gear Ratio | 1:2 (paired sets) |
| Shaft Angle | 90° |
| Material | Engineering Nylon (PA) |
| Color | Blue |
| Bore Size Range | 6 mm – 20 mm (0.24 in – 0.79 in) |
| Keyway Options | 12 mm + 4 mm KW / 14 mm + 5 mm KW / 15 mm + 5 mm KW / 16 mm + 5 mm KW / 18 mm + 6 mm KW / 20 mm + 6 mm KW |
| Outer Diameter | See variant options |
| Face Width | See variant options |
| Weight (per piece) | See variant options |
| Pack Quantity | 1 / 2 / 3 / 4 / 5 pcs |
These gears are sold as 1:2 ratio pairs. The smaller gear (pinion) drives the larger gear (wheel). For example, a 15T pinion pairs with a 30T wheel, and a 20T pinion pairs with a 40T wheel. Choose the tooth count based on the output speed and torque you need: more teeth on the wheel = more torque, less speed. Confirm both gears share Module 1.5 for correct mesh.
Measure your shaft diameter precisely with calipers. Plain bore options (6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm) are suitable for set-screw or press-fit mounting. If your shaft has a keyway cut, select the matching keyway bore variant (e.g., 12 mm + 4 mm KW for a 12 mm shaft with a 4 mm key). A loose bore fit will cause backlash and wear.
Nylon gears handle moderate torque loads well and are preferred where noise reduction and weight savings matter more than maximum load capacity. They are well-suited for robotics, light automation, and hobby CNC machines. For heavy industrial loads or continuous high-torque duty, metal bevel gears would be more appropriate. Check your application's torque requirements against the gear's rated capacity before use.
Yes. Engineering nylon (PA) does not rust and resists mild moisture and chemical exposure. These gears are suitable for humid workshops, light outdoor enclosures, and food-adjacent machinery where metal corrosion is a concern. Avoid prolonged immersion in water or exposure to strong solvents, which can degrade nylon over time.
Nylon is inherently self-lubricating, so these gears can run dry in most light-duty applications. For higher speeds or continuous-duty cycles, a light application of PTFE-based dry lubricant or white lithium grease on the tooth faces can extend service life and further reduce noise. Avoid petroleum-based oils that may swell or degrade nylon over time.
You can purchase individual gears in quantities of 1 to 5 pieces per order. If you need a complete 1:2 drive set, you will need to order both the pinion (smaller tooth count) and the wheel (larger tooth count) separately — for example, one 20T gear and one 40T gear. Both must be Module 1.5 to mesh correctly. Check the variant selector to confirm the tooth count and bore size for each piece.
Standard Module 1.5 straight bevel gears typically use a 20° pressure angle, which is the industry norm for this module size. If your application requires a specific pressure angle for compatibility with existing gears, please contact us to confirm before ordering.
