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Finding a compact, low-noise pinion that fits small motor shafts without excessive backlash is a recurring challenge for robotics builders, 3D printer modders, and mechatronics students. The 1 Mod 16 Teeth Blue Nylon Spur Gear is engineered for exactly these applications — delivering a clean Module 1 tooth mesh on 4 mm or 5 mm shafts, where metal gears would add unnecessary weight and acoustic noise to sensitive mechanisms.
This stepped-bore nylon spur gear is formed from engineering-grade blue nylon (PA-class polymer), combining dimensional stability with inherent self-lubrication and resistance to oils and mild chemicals. The gear carries 16 teeth at Module 1, giving a pitch diameter of 16 mm (approx. 0.63 in) and an outer diameter of approximately 18 mm (0.71 in). The stepped bore accommodates shaft diameters of 4 mm and 5 mm (0.16 in and 0.20 in) — the two most common shaft sizes found on small DC motors, micro stepper motors, and hobby servo output shafts.
Typical use cases include: small-ratio pinion drives on NEMA 14 and NEMA 17 stepper motor shafts in compact 3D printer extruder assemblies; gear-train stages in tabletop robotics arms and wheeled platforms where a 1 Mod 16-tooth nylon pinion pairs with a larger mating spur gear for speed reduction; and educational mechatronics kits requiring interchangeable Module 1 plastic gears that mesh with standard 1M racks and worm wheels.
| Module | 1 (1M) |
|---|---|
| Number of Teeth | 16 |
| Pitch Diameter | 16 mm (0.63 in) |
| Outer Diameter (approx.) | 18 mm (0.71 in) |
| Bore Diameter | See variant options (4 mm / 5 mm) |
| Gear Width (Face Width) | See variant options |
| Material | Engineering-grade nylon (PA-class polymer) |
| Color | Blue |
| Pressure Angle | 20° |
| Bore Style | Stepped bore with hub |
| Lubrication Required | Not required (self-lubricating); light grease optional |
| Corrosion Resistance | Resistant to moisture, oils, and mild chemicals |
| Packing Quantity | 1 PCS / 2 PCS / 5 PCS / 10 PCS (select above) |
Measure your motor or drive shaft diameter with a caliper before ordering. The 4 mm bore suits most small DC motors, NEMA 14 stepper shafts, and micro gear motors. The 5 mm bore fits NEMA 17 stepper motor shafts and many hobby servo output shafts. An accurate measurement is essential — the stepped bore does not allow cross-size adjustment after purchase.
Yes. This gear uses the standard Module 1 tooth profile with a 20° pressure angle, making it fully compatible with any Module 1 (1M) spur gear, rack, or pinion regardless of material. Confirm that your mating component is also rated Module 1 before pairing.
Engineering-grade nylon handles light-to-medium loads well — typical for small DC motors, stepper-driven axes, and educational mechanisms. It is not recommended for high-torque or continuous heavy-duty industrial drives, where steel or brass gears are more appropriate. For most DIY and maker applications with motors rated under a few watts, nylon provides adequate strength with lower noise and weight.
No regular lubrication is required — nylon is inherently self-lubricating. For high-cycle or continuous-duty use, a light application of dry PTFE spray or compatible grease on the tooth faces can extend service life. Avoid petroleum-based greases that may degrade certain nylon grades over extended contact.
Nylon offers good resistance to moisture, mild acids, oils, and common solvents, making it suitable for humid indoor environments and light outdoor use. For prolonged outdoor exposure or submerged applications, verify compatibility with your specific conditions, as extended UV exposure can affect nylon over time.
The pitch diameter of this gear is 16 mm (Module 1 × 16 teeth). Gear ratio is determined by dividing the tooth count of the driven gear by the tooth count of the driving gear. For example, pairing this 16-tooth pinion with a 48-tooth mating gear gives a 3:1 speed reduction. Use this relationship to calculate the ratio needed for your specific drive stage.
The 1 PCS option is ideal for single-axis prototyping or evaluation. The 2 PCS pack suits dual-axis or mirrored drive configurations. The 5 PCS pack is a practical choice for small production runs or classroom kits. The 10 PCS pack offers the best per-unit value for larger builds, spare-parts stock, or multi-robot projects.
