12T - 60T Mod 1 1.5 Spur Gear 45# Steel Pinion Gear Thickness 1M-10mm 1.5M-15mm

The module number defines the tooth size and pitch — Mod 1 teeth are smaller and suit lighter loads or compact gear trains, while Mod 1.5 teeth are larger and handle higher torque. The face width (10 mm vs 15 mm) also affects load capacity: wider gears distribute force over more contact area. Match the module to your existing mating gear or rack; mixing modules will result in incorrect mesh and premature wear.

Gear ratio is determined by dividing the driven gear's tooth count by the driving gear's tooth count. For example, pairing a 12T pinion with a 60T gear gives a 5:1 reduction ratio. Identify your required output speed or torque multiplication first, then select the tooth counts accordingly. If you need help calculating, feel free to contact us with your motor RPM and target output speed.

45# medium-carbon steel offers a tensile strength typically in the range of 600–800 MPa after standard heat treatment, making it well-suited for light-to-medium duty gear applications such as DIY CNC machines, robotic joints, and conveyor drives. For heavy industrial loads or high-shock environments, consider whether a hardened or alloy steel gear would be more appropriate for your specific torque and duty cycle.

45# carbon steel is not inherently corrosion-resistant. For indoor, dry environments these gears perform well with standard lubrication. If your application involves moisture, humidity, or exposure to cutting fluids, we recommend applying a light machine oil or grease regularly, or considering a stainless steel or coated alternative. Contact us if you need guidance on a corrosion-resistant option.

Bore diameter varies by tooth count and module — a 12T gear has a smaller outer diameter and typically a smaller bore than a 60T gear. Please check the variant detail page or contact us with your shaft diameter before placing your order. We can confirm the bore size for any specific tooth count and module combination to ensure a proper fit on your shaft.

Yes. These spur gears conform to standard metric module pitch (Mod 1 or Mod 1.5), so they mesh directly with any standard Mod 1 or Mod 1.5 rack. This makes them a common choice for linear motion systems in DIY CNC routers, laser cutters, and 3D printer gantries. Ensure the rack module matches the gear module you select.

These gears are supplied with a pre-machined bore. In many cases, the bore may need to be reamed or bored to your exact shaft diameter if a precision fit is required. For a standard keyed or set-screw shaft connection, verify the bore diameter matches your shaft before ordering. Light finishing work such as keyway cutting is common in DIY builds and can be done with standard workshop tooling.