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When your motion system demands a gear that won't add unnecessary mass, generate disruptive noise, or corrode in humid environments, metal pinions fall short. Makers, robotics engineers, and 3D-printer builders who need a reliable 1-module 50-tooth spur gear with a stepped bore find that this blue nylon plastic gear delivers the dimensional accuracy and chemical resistance their builds require — without the weight penalty of steel or aluminum.
Each gear is machined from engineering-grade PA (nylon) in a distinctive blue color, offering a tooth count of 50 and a module of 1 (1M). The stepped bore accommodates shaft diameters from 6 mm (~0.24 in) up to 20 mm (~0.79 in), with bore options at 6, 8, 10, 12, 14, 15, 16, 17, 18, 19, and 20 mm. The outer diameter is approximately 52 mm (~2.05 in) and the face width is typically 10–15 mm (~0.39–0.59 in), consistent with standard 1M gear geometry.
Typical use cases include low-noise conveyor drive systems where metal-on-metal contact is undesirable, lightweight robotic arm joints requiring a 1-module 50-tooth plastic pinion gear, and DIY CNC or 3D-printer extruder drives where a stepped-bore nylon spur gear simplifies shaft fitment without set-screw slippage.
Manufactured from PA nylon for a favorable strength-to-weight ratio, self-lubricating surface, and resistance to oils and mild chemicals — extending service life in demanding drive applications.
Module 1, 50-tooth profile conforms to standard spur gear geometry, ensuring direct mesh compatibility with any 1M rack, pinion, or mating gear in your drivetrain.
The stepped bore design accepts shaft diameters from 6 mm to 20 mm across eleven size options, eliminating the need for custom bushings or adapters in most hobby and light-industrial builds.
Nylon's inherent damping properties reduce gear mesh noise and vibration compared to metal alternatives — ideal for indoor robotics, desktop automation, and noise-sensitive environments.
Nylon density is roughly one-seventh that of steel, making this gear a practical choice for robotic arms, aerial platforms, and portable devices where every gram matters.
Unlike bare steel gears, nylon does not rust or oxidize, making this stepped-bore plastic spur gear suitable for outdoor enclosures, aquatic mechanisms, and food-adjacent machinery where corrosion is a concern.
| Module | 1 (1M) |
|---|---|
| Tooth Count | 50 Teeth |
| Outer Diameter | ~52 mm (~2.05 in) |
| Face Width | Typically 10–15 mm (0.39–0.59 in) |
| Bore Diameter | 6 / 8 / 10 / 12 / 14 / 15 / 16 / 17 / 18 / 19 / 20 mm |
| Bore Type | Stepped bore |
| Material | Engineering-grade PA Nylon |
| Color | Blue |
| Pressure Angle | 20° |
| Gear Type | Spur Gear (Pinion) |
| Weight (per piece) | See variant options |
| Packing | 1 PCS per unit |
Measure your shaft's outer diameter with a caliper. Select the bore option that matches your shaft exactly — for example, if your motor shaft is 8 mm, choose the 8 mm bore variant. The stepped bore profile means the gear seats at the correct diameter without requiring a separate bushing.
Yes. Module 1 is a standardized tooth profile, so this 50-tooth nylon spur gear meshes correctly with any other 1M spur gear, pinion, or rack regardless of material. Confirm the mating gear is also Module 1 before assembling.
Engineering-grade PA nylon offers a tensile strength of approximately 70–85 MPa, which is sufficient for light-to-medium duty drives, robotics, and 3D-printer mechanisms. For high-torque or heavy-load applications exceeding these limits, a metal gear is recommended. Nylon's advantage is its self-lubricating surface and noise damping, not raw load capacity.
Yes. Nylon does not rust or oxidize, making it suitable for humid, outdoor, or splash-prone environments. Note that prolonged submersion in water can cause slight dimensional swelling in nylon; for fully submerged applications, verify dimensional tolerances after a soak test.
Nylon is inherently self-lubricating, so the gear can run dry in most light-duty applications. For higher speeds or loads, a light application of PTFE-based or silicone grease (avoid petroleum-based greases, which can degrade nylon over time) will extend tooth life and reduce operating temperature.
All variants share the same 1M 50-tooth nylon gear body. Price differences between bore sizes reflect manufacturing tolerances for larger stepped bores. Select the bore that matches your shaft diameter; the gear geometry and mesh performance are identical across all bore options.
Yes. The 1M 50-tooth stepped-bore nylon spur gear is well-suited for 3D-printer extruder drives, CNC axis drives, and similar precision motion applications where low noise, light weight, and corrosion resistance are priorities. Verify that the torque and speed requirements of your specific application fall within the load capacity of a 1M nylon gear.
