2 Mod 10-60 Teeth Precision Spur Pinion Gear With Step 45# Steel Motor Gear

The tooth count determines the pitch diameter (PD = Teeth × Module). To find the correct gear ratio, divide the driven gear's tooth count by the driving gear's tooth count. For example, pairing a 10-tooth pinion with a 40-tooth gear gives a 4:1 reduction. Select the tooth count that achieves your target ratio while keeping the centre distance practical for your housing.

Measure your motor or shaft diameter with a calliper before ordering. Available bores are 8, 10, 12, 14, 15, 16, 17, 18, 19, 20, and 22 mm. Choose the bore that matches your shaft diameter exactly — a loose fit will cause runout and noise, while an oversized shaft will not insert. If your shaft uses a keyway, confirm the hub depth is sufficient for your key.

45# medium-carbon steel has a typical tensile strength of approximately 600–800 MPa after normalising. For light-to-medium duty robotics and automation loads this is generally adequate. For high-shock or continuous heavy-load applications, consider whether a heat-treated or alloy-steel variant would better suit your torque requirements. Contact us to confirm suitability for your specific load case.

45# carbon steel has limited inherent corrosion resistance. For indoor, dry environments this is typically not a concern. If your application involves moisture, humidity, or occasional fluid exposure, applying a light machine oil or grease to the gear teeth will provide adequate protection for most workshop and robotics environments. For outdoor or wet environments, consider stainless steel or plastic alternatives.

Yes — provided your existing gear or rack is also Module 2 with a 20° pressure angle, these pinion gears will mesh correctly. Module (modulus) is the fundamental compatibility parameter for metric spur gears. Do not attempt to mesh M2 gears with M1, M1.5, M2.5, or other module gears, as the tooth geometry is incompatible and will result in interference or rapid wear.

A stepped bore hub has a shoulder machined into the bore, creating a positive axial stop when the gear is pressed or slid onto a shaft. This prevents the gear from migrating along the shaft axis during operation without requiring a separate thrust washer or collar in many setups. A plain bore gear has a uniform cylindrical hole and relies entirely on set screws, keys, or press-fit for axial retention.

Yes. Module 2 spur pinion gears are commonly used in desktop CNC router Z-axis drives, rotary axis attachments, and extruder gear trains where a robust metal gear is preferred over plastic. Verify that the bore matches your stepper or servo motor shaft, and confirm the tooth count gives you the desired steps-per-mm or gear ratio for your motion controller settings.