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When your robotics project, 3D printer extruder, or small automation rig demands a gear that won't add unnecessary weight or generate disruptive noise, metal pinions fall short. Makers, hobbyists, and small-scale engineers who need a reliable 1 mod 38-tooth spur gear with a stepped bore will find this blue nylon pinion an ideal drop-in solution — no machining required.
Each gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a good balance of tensile strength, low friction, and corrosion resistance. The stepped hub design accommodates bore diameters from 6 mm (0.24 in) to 17 mm (0.67 in), with a module of 1 and 38 teeth giving an outer diameter of approximately 40 mm (1.57 in). Available in packs of 1, 2, or 5 pieces to suit prototyping or small-batch builds.
Typical use cases include: compact DC motor pinion drives in tabletop robotics and CNC pen plotters; extruder gear replacements in FDM 3D printers requiring low-noise 1 mod gearing; and light-duty conveyor or indexing mechanisms in maker-grade automation rigs where a plastic spur gear with stepped bore simplifies shaft fitment.
Manufactured from PA66-class nylon for a reliable combination of mechanical strength, low friction coefficient, and resistance to common lubricants and mild chemicals.
Standard 1M tooth profile ensures accurate mesh with any compatible 1 mod rack, pinion, or spur gear — no custom tooling or profile grinding needed.
The integrated step hub accepts shaft diameters from 6 mm to 17 mm, eliminating the need for bushings or adapters across a wide range of motor and drive shaft sizes.
Nylon's inherent damping properties reduce gear mesh noise compared to metal alternatives — ideal for desktop robots, printers, and any application where acoustics matter.
Unlike steel or cast-iron gears, this nylon spur gear will not rust or oxidize, making it suitable for light-duty outdoor enclosures, humid workshops, or washdown-adjacent setups.
Order a single piece for prototyping, a pair for mirrored drive trains, or a 5-pack for small production runs — all shipped as a single line item for easy inventory management.
| Module | 1M (1.0) |
|---|---|
| Number of Teeth | 38T |
| Pitch Diameter | 38 mm (1.50 in) |
| Outer Diameter (approx.) | 40 mm (1.57 in) |
| Bore Diameter Options | 6 / 8 / 10 / 12 / 14 / 15 / 16 / 17 mm |
| Hub / Step Design | Stepped bore hub |
| Material | Engineering nylon (PA66-class) |
| Color | Blue |
| Pressure Angle | 20° |
| Gear Face Width | See variant options |
| Hub Length | See variant options |
| Max Torque Rating | See variant options |
| Packing Quantity | 1 PCS / 2 PCS / 5 PCS |
Measure your motor or drive shaft diameter with calipers and select the matching bore option (6, 8, 10, 12, 14, 15, 16, or 17 mm). The stepped hub design means the gear seats directly on the shaft — no bushing required. If your shaft falls between listed sizes, contact us to confirm fitment before ordering.
PA66-class nylon offers good tensile strength and fatigue resistance for light-to-medium duty applications such as desktop robots, 3D printer extruders, pen plotters, and small indexing mechanisms. For high-torque or continuous heavy-load drives, a metal gear would be more appropriate. If you are unsure, share your torque and RPM requirements and we can advise.
Nylon is inherently corrosion-free and resistant to moisture, mild oils, and common workshop chemicals. It will not rust. Note that prolonged submersion in water can cause slight dimensional swelling in nylon; for fully submerged applications, verify dimensional tolerances after soak testing.
Yes. This gear follows the standard 1 Module (1M) tooth profile with a 20° pressure angle, so it meshes correctly with any conforming 1M metal or plastic spur gear, rack, or pinion. Ensure the mating gear also specifies 1M and 20° pressure angle for proper mesh.
The gear uses a stepped bore fit. Depending on your shaft tolerance, you may secure it with a set screw (not included), a shaft collar, or a press fit. We recommend drilling and tapping a set-screw hole in the hub if a positive lock is required for your application.
The listed bore options (6–17 mm) cover the most common shaft sizes for this gear class. If you need a non-standard bore, please contact us via the store's contact page before placing your order so we can advise on availability or alternatives.
All packs contain identical gears — the only difference is quantity. The 1 PCS option is ideal for prototyping or single-axis builds. The 2 PCS pack suits mirrored or dual-drive configurations. The 5 PCS pack offers a per-unit saving for small production runs or spare-parts inventory.
