T10 12-40T Timing Belt Pulley CNC Drive Pitch 10mm AF-type With Keyway Wide 32mm

The tooth count determines your drive ratio. Divide the driven pulley teeth by the driving pulley teeth to get the ratio. For example, a 20 T driving pulley paired with a 40 T driven pulley gives a 2:1 reduction. Higher tooth counts on the driving pulley increase belt speed; lower counts increase torque. Match your motor RPM and required output speed to select the correct combination.

Measure your motor or drive shaft diameter precisely with calipers. Select the bore that matches your shaft exactly — available options range from 8 mm to 30 mm. The keyway is pre-cut to the standard DIN 6885 size for each bore, so a matching key (sold separately) will fit without modification.

Keyway dimensions are matched to bore size as follows: 8 to 10 mm bore uses a 3x1.4 mm keyway; 10 to 12 mm bore uses a 4x1.8 mm keyway; 14 to 17 mm bore uses a 5x2.3 mm keyway; 18 to 22 mm bore uses a 6x2.8 mm keyway; 24 to 30 mm bore uses an 8x3.3 mm keyway. Select the Keyway and Amount variant option to confirm the exact keyway for your chosen bore.

The groove is machined for 32 mm wide T10 belts (T10-32). Narrower T10 belts (such as T10-16 or T10-25) can run in the groove but will not use the full width, which may reduce load capacity. Wider belts will not fit. For best performance, use a T10-32 belt.

The aluminum alloy construction is well-suited for light-to-medium duty CNC, 3D printing, and automation applications. The keyed bore significantly increases torque capacity compared to set-screw-only designs. For heavy industrial drives with sustained high torque, verify your calculated torque against the pulley rated capacity or contact us to confirm suitability.

Aluminum alloy naturally forms a protective oxide layer, making these pulleys resistant to light moisture and humidity in typical workshop or indoor automation environments. No lubrication is required for the pulley itself. Keep the mating timing belt clean and free of oils or solvents that could degrade the belt material.

Yes. T10 pulleys are commonly used on larger-format CNC routers and industrial-grade 3D printers where the 10 mm pitch provides higher positional accuracy per step compared to GT2 or T5 profiles. Confirm your existing belt pitch is T10 and that your motor shaft matches one of the available bore sizes before ordering.

The pulley includes a pre-machined keyway slot but does not include the key itself. Standard parallel keys (DIN 6885 / ISO 773) in the appropriate size are widely available at hardware and industrial suppliers. Match the key dimensions to the keyway size listed for your chosen bore variant.