HTD-8M 10T-60T Timing Belt Pulley Pitch 8mm AF-type Synchronous Wheel Width 27mm

The tooth count determines the pitch diameter and, combined with the mating pulley's tooth count, sets your drive ratio. Divide the driven pulley teeth by the driver pulley teeth to get the ratio. For example, a 20T driver paired with a 40T driven pulley gives a 2:1 reduction. Use a smaller tooth count on the motor side for speed reduction and torque multiplication, or a larger count for speed increase.

Measure your motor or gearbox output shaft diameter with a caliper and select the matching bore size from the variant dropdown. The AF-type bore uses a set screw to clamp onto the shaft — ensure the shaft has a flat or keyway for the set screw to seat against for maximum holding force. Available bore sizes range from 6 mm to 38 mm depending on the tooth count selected.

Yes — these pulleys are designed for standard HTD-8M (8 mm pitch) timing belts with a width of 27 mm or less. Confirm your belt's pitch is 8 mm and its width does not exceed 27 mm. If your belt is narrower (e.g., 20 mm), the pulley will still function but the belt will not span the full face width.

The AF-type bore relies on one or two set screws tightened against the shaft. For best holding strength, use a shaft with a machined flat or keyway, apply thread-locking compound to the set screw, and torque to the fastener manufacturer's specification. For very high-torque or reversing-load applications, consider a keyed bore variant or a shaft collar as a secondary retention method.

Corrosion resistance depends on the material and finish of the specific variant. If your application involves moisture, coolant, or outdoor exposure, contact us to confirm the material specification before ordering. For demanding environments, consider adding a protective coating or selecting a stainless or anodized variant if available.

Yes. HTD-8M pulleys are widely used in CNC gantry systems, 3D printer Z-axis and extruder drives, laser cutter motion systems, and robotic arm joints. Select the tooth count that matches your desired belt speed and torque ratio, and verify the bore fits your stepper or servo motor shaft. The 27 mm belt width provides good load capacity for most maker and light-industrial CNC applications.

HTD (High Torque Drive) pulleys have a rounded, curvilinear tooth profile that distributes belt load over a larger contact area compared to the sharp-angled teeth of trapezoidal profiles like MXL, XL, or L. This makes HTD pulleys better suited for high-torque, high-speed applications where tooth wear and belt fatigue are concerns. HTD-8M and trapezoidal pulleys are not interchangeable — always match the pulley profile to your belt profile.