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When your project demands a reliable 90-degree direction change without the weight penalty of metal, finding the right bevel gear can be a real headache. Hobbyists, robotics builders, and small-machine designers all face the same challenge: metal gears corrode, add unnecessary mass, and demand lubrication that plastic-friendly builds simply cannot accommodate. These Module 1 nylon bevel gears solve that problem directly.
Each gear is machined from engineering-grade nylon, finished in a distinctive blue color for easy identification in multi-gear assemblies. The straight-tooth bevel profile follows a true 90° 1:1 mating angle, meaning paired gears transmit rotation at exactly equal speed ratios. Tooth counts span 15, 20, 25, and 30 teeth (Module 1), and bore sizes range from 4 mm (approx. 5/32 in) up to 16 mm (approx. 5/8 in), with select variants offering a pre-cut keyway for positive shaft locking.
These nylon bevel gears are well suited for lightweight CNC router axis drives, 3D-printer extruder gearboxes, small conveyor direction-change assemblies, and educational robotics kits where corrosion resistance and low noise are priorities. The optional keyway bore variants are especially useful for stepper-motor shaft coupling in desktop automation projects.
| Gear Module | Module 1 (M1) |
|---|---|
| Tooth Profile | Straight bevel |
| Shaft Angle | 90° |
| Speed Ratio | 1:1 |
| Available Tooth Counts | 15T, 20T, 25T, 30T |
| Bore Sizes (Plain) | 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm |
| Bore Sizes (with Keyway) | 8 mm + 3 mm keyway, 10 mm + 4 mm keyway, 12 mm + 4 mm keyway |
| Material | Engineering-grade nylon |
| Color / Finish | Blue |
| Outer Diameter | See variant options |
| Face Width | See variant options |
| Weight (per piece) | See variant options |
| Pack Quantity | 1 pcs / 2 pcs / 3 pcs / 4 pcs / 5 pcs |
| Lubrication Required | None (self-lubricating) |
For a 1:1 speed ratio, both mating gears must have the same tooth count. Choose a higher tooth count (25T or 30T) when you need smoother, quieter operation at moderate speeds, or a lower count (15T or 20T) when space is tight and torque loads are light. All four options share the same Module 1 pitch, so they mesh correctly with any same-count partner gear.
Measure your motor or drive shaft diameter with a caliper and select the matching bore. Common stepper motor shafts are 5 mm or 8 mm; servo output shafts are often 6 mm. If your shaft has a flat key slot, choose the corresponding keyway variant (e.g., 8 mm + 3 mm keyway) to prevent rotational slipping under load.
Engineering-grade nylon handles moderate torque and intermittent shock loads well in low-to-medium speed applications typical of hobby robotics, desktop CNC routers, and small conveyor systems. For continuous high-torque or high-RPM industrial duty cycles, contact us to confirm suitability before ordering.
No. Nylon is inherently self-lubricating, so these gears run cleanly without grease or oil in most hobby and light-duty applications. If you are operating at sustained high speeds or elevated temperatures, a small amount of dry PTFE lubricant can extend service life, but it is not required for normal use.
Yes. Unlike steel or iron gears, nylon does not rust or corrode when exposed to moisture, light rain, or high humidity. However, prolonged submersion in water or exposure to strong solvents (acetone, MEK) can degrade the material over time. For fully waterproof applications, confirm the specific chemical environment with us before purchase.
No — for a 90° 1:1 straight bevel pair, both gears must have the same tooth count. A 15T gear must pair with another 15T gear, a 20T with a 20T, and so on. Mixing different tooth counts on this 1:1 bevel design will result in incorrect meshing geometry and premature wear.
A bevel gear pair requires two gears (one per shaft), so most builds need at least 2 pieces of the same tooth count and bore size. Order 1 piece if you are replacing a single worn gear in an existing pair. Choose 3–5 pieces if you are building multiple axes, want spares on hand, or are prototyping several configurations — the per-unit price decreases with larger pack sizes.
