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When your robotics project, 3D printer extruder, or small-scale automation demands a reliable, low-noise gear that won't corrode or add unnecessary weight, metal pinions often fall short. Hobbyists, makers, and small-machine builders need a stepped-bore spur gear that fits multiple shaft sizes without custom machining — and that's exactly what this 1 Mod 36-tooth blue nylon spur gear delivers.
This spur gear is machined from engineering-grade nylon (PA66), featuring a module of 1 (Mod 1) and 36 teeth. The stepped bore accommodates shaft diameters from 6 mm (0.24 in) to 17 mm (0.67 in), covering the most common hobby and light-industrial shaft sizes. The outer diameter is approximately 38 mm (1.50 in), with a face width typically in the 10–15 mm (0.39–0.59 in) range depending on the bore variant selected.
Typical use cases include: DIY CNC router axis drives requiring a quiet 1 mod 36-tooth plastic pinion gear; desktop 3D printer extruder and Z-axis gear replacements; and small robotic arm joint drives where a lightweight nylon spur gear with stepped bore reduces inertia and noise.
| Module (Mod) | 1 |
|---|---|
| Number of Teeth | 36 |
| Outer Diameter (OD) | ~38 mm (1.50 in) |
| Face Width | Typically 10–15 mm (0.39–0.59 in) |
| Bore Diameter | 6 / 8 / 10 / 12 / 14 / 15 / 16 / 17 mm (see variant options) |
| Bore Type | Stepped bore with set-screw flat |
| Material | PA66 Engineering Nylon |
| Color | Blue |
| Pressure Angle | 20° |
| Gear Type | Spur (straight tooth) |
| Weight per Piece | See variant options |
| Packing Quantity | 1 PCS / 2 PCS / 5 PCS (see variant options) |
Measure your motor or drive shaft diameter with a caliper. Select the bore option that matches your shaft exactly — available in 6, 8, 10, 12, 14, 15, 16, and 17 mm. The stepped bore design means the gear body is the same across bore sizes; only the inner bore diameter differs. If your shaft has a flat (D-cut), use the set-screw flat to secure the gear.
Mod 1 nylon spur gears are designed for light-to-medium duty applications. PA66 nylon has a tensile strength of approximately 80 MPa and handles continuous torque loads typical of small stepper motors (NEMA 17/23) and hobby servo systems. For heavy industrial loads or high-impact applications, a metal gear is recommended.
Yes. PA66 nylon does not rust, corrode, or oxidize. It is resistant to oils, greases, and mild chemicals, making it suitable for humid environments, light outdoor enclosures, and applications where metal gears would degrade over time. Avoid prolonged exposure to strong acids or UV radiation without protective coatings.
Yes — as long as your mating gear is also Module 1 (Mod 1) with a 20° pressure angle, this nylon spur gear will mesh correctly. Module 1 is a standard metric gear specification. Do not attempt to mesh with imperial DP gears or different module gears, as tooth profiles will not be compatible.
Nylon is self-lubricating, so dry operation is acceptable for light loads. For nylon-on-metal pairings under moderate load, a light application of white lithium grease or PTFE-based lubricant can extend service life and reduce wear on the metal mating gear. Avoid petroleum-based oils that may swell the nylon over time.
Order 1 PCS if you need a single replacement or prototype gear. Choose 2 PCS for paired-axis builds (e.g., dual Z-axis 3D printers). The 5 PCS pack offers the best per-unit value for multi-axis machines, robotics kits, or keeping spares on hand. All packs ship the same gear — only quantity differs.
This gear uses the standard 20° pressure angle, which is the most common metric spur gear standard. Ensure your mating gear also uses a 20° pressure angle for correct meshing. Gears with 14.5° pressure angles (older standard) are not compatible.
