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When gear noise and backlash become a bottleneck in your motion-control build, engineers and makers turn to helical gears for a reason. These nylon motor pinion gears are designed for hobbyists, robotics builders, and small-machine designers who need smooth, low-vibration power transmission without the weight or corrosion risk of metal gears.
Each gear is machined from engineering-grade nylon (PA66), offering a good balance of strength, wear resistance, and self-lubrication. Available in three module sizes — Mod 1, Mod 1.5, and Mod 2 — with a 45° helix angle, tooth counts from 13T to 26T, and bore options from 6 mm (0.24 in) up to 20 mm (0.79 in). Keyway variants (4 mm, 5 mm, or 6 mm keyway) are available for shaft-locking applications.
Typical use cases include DIY CNC router Z-axis drives, small robotic arm joints requiring quiet operation, 3D printer extruder gearboxes, and light-duty conveyor pinion stages where a nylon helical gear for motor shaft provides the right torque-to-noise trade-off.
The angled tooth profile distributes load gradually across the face width, reducing impact noise and vibration compared to straight-cut spur gears — ideal for noise-sensitive enclosures.
Nylon offers inherent self-lubrication, corrosion immunity, and chemical resistance, making these gears suitable for environments where metal gears would rust or require frequent greasing.
Choose the module that matches your existing gear train. Mod 1 suits compact, light-load drives; Mod 1.5 balances size and torque; Mod 2 handles heavier loads with larger tooth profiles.
Plain bore options from 6 mm to 16 mm cover most small motor shafts. Keyway variants (bore + keyway combinations up to 20 mm bore + 6 mm keyway) provide positive shaft engagement for higher-torque applications.
Order a single gear for a prototype or a pack of 5 for a production run or spare-parts inventory — all at consistent per-unit quality.
Nylon gears weigh significantly less than equivalent steel or brass gears, reducing inertia on servo-driven axes and extending motor life in battery-powered robotic platforms.
| Material | Engineering Nylon (PA66) |
|---|---|
| Helix Angle | 45° |
| Module (Mod) | 1 / 1.5 / 2 (see variant options) |
| Tooth Count | 13T, 15T, 20T, 26T (Mod 1); 10T, 13T, 15T, 20T (Mod 1.5); 13T, 15T (Mod 2) — see variant options |
| Bore Diameter | 6 mm – 20 mm (see variant options) |
| Keyway | 4 mm, 5 mm, or 6 mm (keyway variants only; see variant options) |
| Pressure Angle | 20° (standard) |
| Outer Diameter | See variant options |
| Face Width | See variant options |
| Color / Finish | Natural nylon (off-white / beige) |
| Pack Quantity | 1 / 2 / 3 / 5 pcs (see variant options) |
The module must match the mating gear in your drive train — you cannot mix modules. Mod 1 is suited for light-load, compact drives (e.g., small robot joints, instrument mechanisms). Mod 1.5 is a common middle ground for CNC router axes and 3D printer gearboxes. Mod 2 handles heavier torque loads with a larger, more robust tooth profile. If you are replacing an existing gear, measure the outer diameter and count the teeth: OD ≈ Module × (Teeth + 2).
Yes. PA66 nylon is self-lubricating, so these gears can run dry in most light-to-medium duty applications. For continuous high-speed or high-load operation, a light application of PTFE-based or silicone grease can extend service life. Avoid petroleum-based greases, which may degrade nylon over time.
Yes. Nylon (PA66) does not rust and resists most mild acids, alkalis, and oils. These gears are suitable for humid environments, light outdoor enclosures, and applications where metal gears would corrode. They are not recommended for prolonged immersion in strong solvents or concentrated acids.
Select the bore that matches your motor or drive shaft diameter exactly. Plain bore variants (6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, 16 mm) are secured with a set screw or adhesive. Keyway variants (e.g., Bore 10 mm + Keyway 4 mm) provide a positive mechanical lock and are recommended for higher-torque or reversing-load applications. Measure your shaft with calipers before ordering.
No. Helical gears must mesh with other helical gears of the same module, the same helix angle (45°), and opposite hand (one left-hand, one right-hand helix). They will not correctly mesh with spur gears of the same module because the tooth geometry is fundamentally different. Ensure your mating gear is also a 45° helical gear.
For prototyping or a one-off build, a single piece (1 pc) is sufficient. If you are building multiple identical assemblies or want spare parts on hand, packs of 2, 3, or 5 offer a lower per-unit cost. For production runs or classroom/lab kits, the 5-pack is the most economical choice.
Torque capacity depends on the module, tooth count, face width, and operating speed. As a conservative guideline, Mod 1 gears are suited for light-duty drives (typically under 1–2 N·m at low speeds); Mod 1.5 and Mod 2 gears handle moderate loads. For precise torque ratings, contact us with your application details — speed (RPM), load, and duty cycle.
