Spur Gears Pinion Gear 1 Mod Transmission Gear With Step 60T-90T Teeth 45# Steel

Select the tooth count based on your required gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For example, pairing a 60T gear with a 20T pinion gives a 3:1 reduction. Higher tooth counts (80T, 90T) produce larger pitch diameters and are suited to slower, higher-torque stages.

Measure your shaft's outer diameter with a caliper. Choose the bore that matches your shaft exactly — a bore that is too large will cause runout and backlash. If you need a keyway or set-screw fit, confirm the hub wall thickness is sufficient for your torque load before ordering.

The stepped hub provides a machined shoulder that acts as an axial stop when the gear is pressed or slid onto a shaft. This eliminates the need for a separate spacer collar and ensures repeatable axial positioning. Choose 30 mm step for compact assemblies and 40 mm step where a larger bearing surface is needed.

45# medium-carbon steel offers a tensile strength typically in the 600–800 MPa range and is widely used for moderate-load mechanical gears. It is suitable for CNC routers, 3D printer drives, light conveyor systems, and tabletop robotics. For very high-speed or heavy industrial loads, consider whether a hardened or alloy-steel gear is more appropriate for your specific torque and duty cycle.

45# steel has moderate corrosion resistance. For indoor or dry environments these gears perform well without additional treatment. If used in humid, outdoor, or lightly wet conditions, applying a light machine oil or grease to the gear teeth and bore will significantly extend service life. For highly corrosive environments, a stainless-steel or coated gear would be more appropriate.

Yes — these gears follow the standard Module 1 (Mod 1) tooth profile with a 20° pressure angle, which is the most common metric gear standard. They will mesh correctly with any other Mod 1 spur gear or rack of the same module and pressure angle, regardless of brand, as long as the face widths are compatible.

Yes. Most variants are available in a 1-piece quantity option, allowing you to verify fit, bore clearance, and mesh quality before committing to a larger order. Multi-piece packs (2, 3, or 5 pcs) are available at a lower per-unit cost for multi-axis or production builds.