3M 15T-60T Timing Belt Pulley Synchronous Wheel Sprockets For 10mm Width Belt

Select your tooth count based on the drive ratio you need. Divide the driven pulley teeth by the driver pulley teeth to get your ratio. For example, a 15T driver paired with a 30T driven pulley gives a 2:1 reduction. Higher tooth counts on the driven side slow the output and increase torque; lower tooth counts increase speed. For most desktop CNC and 3D printer builds, 20T–30T on the motor shaft is a common starting point.

Standard NEMA 17 stepper motors have a 5mm output shaft diameter. Select the 5mm bore option. If your motor has a flat (D-cut) shaft, the set screw will engage the flat for a more secure fit. Always measure your shaft with calipers before ordering to confirm the diameter.

The flanged groove on this pulley is sized for 10mm wide 3M pitch belts. While the tooth profile will mesh with any 3M pitch belt regardless of width, using a narrower belt risks the belt riding off the flange, and a wider belt will not seat correctly. Always match belt width to pulley groove width for reliable tracking.

Aluminum alloy pulleys are well-suited for light-to-medium duty automation loads typical of CNC routers, 3D printers, and small conveyor systems. For heavy industrial loads with high belt tension or shock loading, consider steel pulleys. If you are unsure whether your application falls within the aluminum rating, contact us with your load and speed requirements.

Aluminum alloy naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor environments. For humid, wet, or outdoor applications, an additional anodizing or coating treatment is advisable. These pulleys are intended for indoor automation and workshop use. Contact us to confirm suitability for your specific environment.

Yes. You can use two pulleys from this range — one on the motor shaft and one on the driven shaft — as long as both share the same 3M pitch and the belt width is 10mm. Mix different tooth counts to achieve your desired gear ratio, or use matching tooth counts for a 1:1 drive.

Slide the pulley onto the shaft until it is positioned at the desired axial location. Use an appropriate hex key (Allen wrench) to tighten the set screw against the shaft. If the shaft has a D-flat, align the set screw with the flat before tightening for maximum grip. Ensure the pulley is aligned with the mating pulley in the same plane to prevent belt tracking issues.