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When your motion system demands low noise, corrosion resistance, and a weight advantage over metal, a plastic nylon spur gear is the component engineers and makers reach for first. Whether you are building a desktop robot arm, a custom 3D printer extruder drive, or a small automation fixture, finding a spur gear that matches your exact module and bore without custom machining is a persistent challenge. This listing solves that by offering a broad matrix of module and tooth count combinations in a single, ready-to-ship component.
These nylon spur gears are machined from engineering-grade polyamide (PA/nylon) stock, delivering a self-lubricating surface and inherent resistance to moisture and mild chemicals. Available in four module sizes — 1M, 1.5M, 2M, and 3M — with tooth counts spanning 10 T to 60 T, and bore diameters ranging from 5 mm (~0.20 in) up to 30 mm (~1.18 in) including plain round bores and keyed bores (keyway widths 4–9 mm). Outer diameters scale with module and tooth count, typically from approximately 17 mm (~0.67 in) for a 1M 15T up to approximately 66 mm (~2.60 in) for a 3M 20T.
Typical use cases include low-to-medium load transmission in desktop CNC machines and 3D printer drive trains, gear reduction stages in robotics and servo-driven mechanisms, and replacement or prototype gears for small appliances and educational kits where a nylon spur gear with step hub provides axial retention without additional hardware.
Available in 1M, 1.5M, 2M, and 3M to match standard metric gear trains without custom tooling.
10 T to 60 T options let you dial in your gear ratio precisely across a single product family.
Plain round bores (5–16 mm) and keyed bores (12×4 mm to 30×8 mm) for secure shaft coupling without slippage.
PA nylon construction is self-lubricating, corrosion-resistant, and significantly lighter than equivalent steel gears.
Integrated step hub provides axial positioning reference and simplifies assembly in multi-gear stacks.
Nylon-on-nylon or nylon-on-metal meshing produces noticeably quieter operation than all-metal gear pairs at comparable loads.
| Material | Engineering-grade polyamide (PA/nylon) |
|---|---|
| Module Options | 1M / 1.5M / 2M / 3M |
| Tooth Count Range | 10 T – 60 T (varies by module; see variant options) |
| Bore Type | Plain round bore or keyway bore (see variant options) |
| Plain Bore Diameter Range | 5 mm – 16 mm (~0.20 in – 0.63 in) |
| Keyway Bore Range | 12×4 mm to 30×8 mm (see variant options) |
| Outer Diameter | See variant options |
| Hub Style | Stepped hub |
| Tooth Profile | Standard metric involute (20° pressure angle, inferred) |
| Surface Finish | Natural nylon (off-white/beige) |
| Packing Quantity | 1 piece per order unit |
| Weight | See variant options |
The module (M) defines the tooth size and must match between mating gears. A 1M gear will only mesh correctly with another 1M gear. Larger modules (2M, 3M) have bigger, stronger teeth suited to higher torque, while smaller modules (1M, 1.5M) are used in compact, lower-load mechanisms. Check your existing gear or design specification for the module before selecting.
Yes. Nylon-to-metal meshing is a common and intentional pairing in many drive systems. The nylon gear acts as the sacrificial wear component, protecting the metal gear and reducing system noise. Ensure both gears share the same module and pressure angle (standard metric involute, 20°).
A plain bore is a smooth cylindrical hole; the gear is typically secured to the shaft with a set screw or press fit. A keyway bore includes a rectangular slot that accepts a key inserted between the shaft and gear, providing a positive, non-slip torque connection. Choose a keyway bore when transmitting higher torque or when preventing rotational slip is critical.
Nylon spur gears are suited to light-to-medium duty applications. Exact load capacity depends on module, tooth count, operating speed, and temperature. As a conservative guideline, 1M gears are appropriate for low-torque, high-speed applications (robotics, 3D printers), while 2M and 3M gears handle moderate torque in slower mechanisms. For heavy industrial loads, a metal gear is recommended.
Yes. Nylon (polyamide) is inherently resistant to moisture, mild oils, and many common chemicals, making these gears suitable for environments where metal gears would corrode. They are not recommended for prolonged exposure to strong acids, bases, or temperatures above approximately 100 °C (212 °F) under load.
Nylon is self-lubricating, so these gears can run dry in many applications. For extended service life under continuous or high-cycle operation, a light application of PTFE-based or silicone grease is beneficial. Avoid petroleum-based greases that may degrade the nylon over time.
Measure your shaft diameter with a caliper. Select the plain bore option that matches your shaft diameter (5, 6, 7, 8, 10, 12, 14, 15, or 16 mm). If your shaft has a keyway, select the corresponding keyway bore variant (e.g., Keyway Bore: 12×4 mm means a 12 mm shaft diameter with a 4 mm wide key slot). Contact us to confirm availability for your specific combination.
