Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a noisy metal gear or a mismatched bore size stalls your build, you need a drop-in solution that just works. Whether you're a robotics hobbyist, a 3D-printer tinkerer, or an automation engineer prototyping a new drive train, finding a spur gear that combines the right tooth count, the right bore, and quiet operation in one package can be frustrating. These blue nylon spur gears are designed specifically for makers and engineers who need reliable, low-noise power transmission without the weight or corrosion concerns of steel.
Each gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a good balance of toughness, self-lubrication, and chemical resistance. The module is 1 (Mod 1), meaning the tooth pitch is standardized at 1 mm per tooth — the most common metric module for small-scale drives. Teeth count ranges from 15T to 50T, and bore diameter options span 4 mm (~0.16 in) to 20 mm (~0.79 in), covering the most popular motor shaft sizes. Each gear ships with set screws pre-tapped into the hub for secure shaft fixation without adhesives.
These pinion gears are well-suited for DC motor gearboxes in robotics and RC vehicles, stepper motor drives in CNC routers and 3D printers, and light-duty conveyor or indexing mechanisms in automation prototypes. The nylon construction keeps noise low and eliminates the need for external lubrication in most applications — a practical choice for any enclosed drive system.
| Module | 1 (Mod 1) |
|---|---|
| Teeth Number | 15T – 50T (see variant options) |
| Bore Diameter | 4 mm – 20 mm (see variant options) |
| Material | Engineering Nylon (PA66 type) |
| Color | Blue |
| Pressure Angle | 20° |
| Hub Fixation | Set screw (pre-tapped) |
| Lubrication Required | None (self-lubricating) |
| Outer Diameter | See variant options |
| Face Width | See variant options |
| Weight | See variant options |
The teeth count determines your gear ratio. Divide the driven gear's teeth by the driving gear's teeth to get the ratio. For example, pairing a 15T pinion with a 30T gear gives a 2:1 reduction — the output shaft turns at half the speed but with twice the torque. Choose a smaller teeth count for higher speed, or a larger count for more torque.
Measure your motor or shaft diameter with a caliper before ordering. The bore must match the shaft exactly — a loose fit will cause slippage even with the set screw tightened. Available bores range from 4 mm to 20 mm. If your shaft is an imperial size (e.g., 1/4 inch = 6.35 mm), select the 6.35 mm bore option.
Yes. Any two gears with the same module (Mod 1) and the same pressure angle (20°) will mesh correctly regardless of material or teeth count. These gears are fully compatible with other Mod 1 metal or nylon spur gears and Mod 1 racks.
Nylon gears are well-suited for light-to-medium duty applications such as robotics, 3D printers, and small automation systems. They are significantly lighter than steel or aluminum gears and absorb shock loads better, reducing noise. For high-torque or high-temperature environments, a metal gear would be more appropriate.
Yes. Nylon is inherently resistant to moisture, mild chemicals, and oxidation, making these gears suitable for humid environments or applications where occasional exposure to water or light oils is expected. They will not rust like steel gears.
In most applications, no external lubrication is required. Nylon is self-lubricating, which reduces friction and wear during normal operation. If the gear is running at very high speeds or under sustained heavy load, a light application of dry PTFE lubricant can extend service life, but it is not mandatory.
Yes. Module 1 nylon spur gears are commonly used in extruder drives, axis drives, and indexing mechanisms on 3D printers and small CNC routers. Verify your existing gear's module and bore size before ordering to ensure a direct replacement fit.
