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When your build demands a clean 90-degree direction change without the weight or noise of metal gearing, most makers end up compromising on fit or precision. These nylon bevel gears are engineered for hobbyists, robotics builders, and mechanical DIY enthusiasts who need a reliable 1:1 right-angle mesh in a lightweight, corrosion-resistant package — without machining custom parts.
Each gear is injection-molded from engineering-grade nylon (PA), available in Module 1, 1.5, and 2, with tooth counts from 15T to 30T. Outer diameters range from approximately 15 mm (0.59 in) for a 1 Mod / 15T gear up to approximately 60 mm (2.36 in) for a 2 Mod / 30T gear. Bore options span 4 mm to 25 mm, with plain round bores and keyway-cut variants (3 mm, 4 mm, 5 mm, or 6 mm keyway depending on bore size) for positive shaft locking.
Typical use cases include 90-degree power transmission in desktop CNC router axis drives, right-angle gearbox assemblies for small electric vehicles and RC platforms, and low-noise conveyor direction-change mechanisms where a nylon bevel gear pair reduces vibration and eliminates lubrication requirements.
Available in Mod 1, Mod 1.5, and Mod 2 — covering a wide range of torque and speed requirements from light-duty sensor actuators to medium-duty drive shafts.
Precision-formed 20° pressure angle bevel tooth profile delivers accurate right-angle power transmission with minimal backlash at a 1:1 gear ratio.
Engineering-grade PA nylon body is significantly lighter than steel or brass equivalents, reducing rotational inertia and overall assembly weight in mobile and airborne platforms.
Nylon-on-nylon mesh operates quietly and requires no grease or oil under normal loads, making these gears ideal for indoor robots, desktop machines, and noise-sensitive environments.
Choose a plain round bore (4–16 mm) for set-screw mounting, or a keyway-cut bore (8–25 mm with 3–6 mm keyway) for positive, slip-free shaft engagement under reversing loads.
Nylon is inherently resistant to moisture, mild chemicals, and oxidation — suitable for humid workshop environments, outdoor enclosures, and food-adjacent light-duty machinery.
| Material | Engineering-grade Nylon (PA) |
|---|---|
| Module | 1 / 1.5 / 2 (see variant options) |
| Number of Teeth | 15T / 16T / 20T / 25T / 30T (see variant options) |
| Gear Ratio | 1:1 |
| Mesh Angle | 90° |
| Pressure Angle | 20° |
| Bore Diameter | 4 – 25 mm (see variant options) |
| Keyway | 3 / 4 / 5 / 6 mm (keyway variants only; see variant options) |
| Outer Diameter (approx.) | See variant options |
| Finish | Natural nylon (uncoated) |
| Sold As | 1 matched pair (2 gears) |
| Application | DIY drives, robotics, CNC, RC vehicles, conveyor systems |
Module (Mod) defines the tooth size and load capacity. Mod 1 is suited for light-duty, low-torque applications such as sensor actuators and small robots. Mod 1.5 handles moderate loads in desktop CNC and RC drivetrains. Mod 2 is appropriate for higher-torque applications like small electric vehicles or heavier conveyor drives. Both gears in a meshing pair must share the same Module.
A bevel gear pair requires two gears to transmit motion at 90°. This listing sells a matched 1:1 pair — both gears have the same Module and tooth count, so you receive everything needed to complete one right-angle mesh. If you need multiple axes, order one pair per axis.
A plain bore is a smooth round hole; the gear is typically secured to the shaft with a set screw. A keyway bore has a rectangular slot machined into the bore wall; a matching key inserted between the shaft and gear prevents rotational slip under reversing or high-torque loads. Choose keyway variants when your application involves frequent direction changes or significant torque.
Nylon bevel gears are well-suited for light-to-medium duty applications at moderate speeds (typically up to 500–1000 RPM depending on load). They are not recommended for high-torque industrial drives or continuous heavy-load operation. For demanding applications, consider metal bevel gears. If you are unsure, share your torque and speed requirements and we can advise.
Nylon is inherently moisture-resistant and does not rust or oxidize. It performs reliably in humid workshops, outdoor enclosures, and environments with mild chemical exposure. Note that prolonged UV exposure can cause surface degradation over time; a UV-protective enclosure is recommended for long-term outdoor installations.
Measure your shaft diameter with a caliper. Select the bore size that matches your shaft exactly — a bore that is too large will cause runout and noise. For keyway variants, also confirm your shaft has a matching keyway slot cut to the correct width (3, 4, 5, or 6 mm depending on the variant). If your shaft diameter falls between listed sizes, contact us before ordering.
No. Both gears in a bevel pair must have the same Module and the same tooth count to mesh correctly at 90°. Mixing Modules or tooth counts will result in incorrect contact, excessive wear, and potential gear failure. This listing is configured as a matched 1:1 pair, so both gears in your order will be identical in Module and tooth count.
