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Engineers and makers who need smooth, low-noise power transmission often struggle to find gears that fit compact motor shafts without custom machining. These Module 1 nylon helical gears are designed for builders of CNC routers, robotic arms, 3D printer extruder drives, and small automation rigs who demand consistent mesh quality and reduced vibration in tight spaces.
Each gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a good balance of light weight, self-lubrication, and corrosion resistance. The 45° left-hand helix angle delivers axial load distribution for quieter operation compared to spur gears. Tooth counts range from 13 to 26 teeth (Module 1), with bore options spanning 6 mm to 16 mm (approximately 0.24 in to 0.63 in) to suit a wide range of motor pinion shafts.
Typical use cases include stepper motor pinion drives in desktop CNC machines, servo-driven axis geartrains in robotic joints, and paired helical gear sets in small conveyor or indexing mechanisms — all applications where a nylon helical motor pinion gear with a precise bore fit reduces noise and extends service life.
Distributes tooth load across the face width for smoother engagement, reduced impact noise, and lower vibration versus straight spur gears.
Seven bore options — 6, 8, 10, 12, 14, 15, and 16 mm — let you match the gear directly to your motor shaft without a bushing adapter.
Choose 13, 15, 20, or 26 teeth to dial in your gear ratio for torque multiplication or speed increase in your drivetrain.
PA-grade nylon provides self-lubrication, chemical resistance, and low density — ideal for dry-running or lightly lubricated environments.
Order 1 to 5 pieces per variant to prototype with a single gear or stock spares for production runs without overpaying for bulk minimums.
Fully compatible with the international Module 1 gear standard, ensuring interchangeability with other Mod 1 components in your system.
| Module (Pitch) | Module 1 (Mod 1) |
|---|---|
| Helix Angle | 45° Left-Hand |
| Tooth Count Options | 13T / 15T / 20T / 26T |
| Bore Size Options | 6 mm / 8 mm / 10 mm / 12 mm / 14 mm / 15 mm / 16 mm |
| Material | Engineering Nylon (PA-grade) |
| Color | Blue |
| Pitch Diameter (13T) | 13 mm (0.51 in) |
| Pitch Diameter (15T) | 15 mm (0.59 in) |
| Pitch Diameter (20T) | 20 mm (0.79 in) |
| Pitch Diameter (26T) | 26 mm (1.02 in) |
| Face Width | See variant options |
| Hub Diameter | See variant options |
| Pressure Angle | 20° |
| Pack Quantity | 1 / 2 / 3 / 4 / 5 pcs |
| Application | CNC, robotics, automation, 3D printer drives |
Select the tooth count based on your required gear ratio. Pair a 13T pinion with a larger driven gear for torque multiplication, or use a 26T pinion with a smaller gear for speed increase. For a 1:1 ratio, use matching tooth counts on both gears. Always verify the center distance matches your housing design.
Measure your motor shaft diameter with calipers and select the matching bore: 6, 8, 10, 12, 14, 15, or 16 mm. The bore is a close-tolerance fit. If your shaft uses a keyway or set screw, confirm the hub wall thickness is sufficient for your fastening method before ordering.
Yes — for parallel-axis helical gear pairs, a left-hand gear meshes with a right-hand gear of the same module and helix angle. Ensure both gears share the same Module 1 pitch and 45° helix angle for correct engagement. Do not pair with spur gears or different-module gears.
Engineering nylon (PA-grade) handles moderate loads well in dry or lightly lubricated conditions. It is well-suited for stepper and servo motor pinion drives in desktop CNC, 3D printer extruders, and light robotic joints. For heavy-load or high-temperature environments (above ~80–100 °C continuous), consider metal gears instead.
Nylon offers good resistance to oils, greases, and many common chemicals. It is inherently corrosion-free, unlike steel gears. Note that nylon can absorb moisture over time, which may cause slight dimensional changes. For high-humidity environments, allow for this in your tolerance stack-up or use a sealed housing.
Nylon is self-lubricating and can run dry in many light-duty applications. For extended service life under continuous or higher-speed operation, a light application of PTFE-based or silicone grease is recommended. Avoid petroleum-based greases that may degrade nylon over time.
The module number defines the ratio of pitch diameter to tooth count (Module = Pitch Diameter ÷ Tooth Count, in mm). Module 1 gears have a 1 mm pitch diameter per tooth — a common standard for small motors and precision drives. Gears of different modules cannot mesh together; always confirm your mating gear is also Module 1.
