Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your motion system demands repeatable, slip-free power transfer, a mismatched or worn pulley becomes the weakest link in your build. Whether you are upgrading a RepRap 3D printer, tuning a CNC router, or designing a custom linear actuator, these HTD-5M timing belt pulleys give you the exact tooth count and bore size you need without compromise.
Each pulley is machined from aluminum alloy with an anodized finish, featuring an HTD-5M tooth profile (5mm pitch) and available in belt widths of 15mm and 20mm. Tooth counts range from 14T to 60T, and bore diameters span 5mm to 25mm (approximately 0.20 in to 0.98 in), covering the most common shaft sizes used in maker and industrial motion systems.
Typical applications include CoreXY and Cartesian 3D printer drive systems, CNC router axis drives, laser engraver gantry assemblies, and custom robotic joint actuators — anywhere a synchronous HTD-5M timing belt pulley is required for precise, backlash-free positioning.
Choose from 16 tooth count options to dial in your exact gear ratio for speed or torque — from compact 14T drive pulleys to large 60T driven pulleys.
Bore sizes from 5mm to 25mm accommodate stepper motor shafts, servo shafts, and custom axles across a wide range of motion system designs.
The curved HTD tooth profile provides superior load distribution and reduced belt stress compared to trapezoidal profiles, ideal for high-cycle positioning systems.
Available in 15mm and 20mm belt widths to match your existing belt stock and frame constraints without modification.
Lightweight yet rigid aluminum alloy body with anodized surface treatment resists corrosion and wear through extended duty cycles.
CNC-machined bore and tooth profile ensure low runout and consistent belt engagement, reducing vibration and improving print or cut quality.
| Belt Profile | HTD-5M |
|---|---|
| Pitch | 5mm |
| Number of Teeth | 14T, 15T, 25T, 26T, 28T, 30T, 32T, 35T, 36T, 38T, 40T, 42T, 44T, 45T, 50T, 60T |
| Applicable Belt Width | 15mm / 20mm |
| Bore Diameter | 5mm, 6mm, 6.35mm, 7mm, 8mm, 10mm, 12mm, 12.7mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 22mm, 25mm |
| Material | Aluminum alloy |
| Surface Treatment | Anodized |
| Flange | See variant options |
| Outer Diameter | See variant options |
| Hub Length | See variant options |
| Set Screw | See variant options |
| Weight | See variant options |
The tooth count determines your drive ratio. For 3D printers and CNC machines, smaller pulleys (14T–20T) on the motor shaft paired with larger pulleys on the driven axis give you mechanical advantage and finer resolution. For direct-drive or 1:1 setups, match the tooth count on both ends. Refer to your machine's motion system documentation for the recommended tooth count.
Most NEMA 17 stepper motors use a 5mm shaft, while NEMA 23 motors typically use an 8mm or 6.35mm (1/4 inch) shaft. Measure your motor shaft diameter with calipers before ordering. The bore must match the shaft diameter exactly — a loose fit will cause slippage and positioning errors.
The belt width must match the pulley width. A 15mm-wide pulley is designed for 15mm HTD-5M belts, and a 20mm-wide pulley is designed for 20mm HTD-5M belts. Wider belts and pulleys can transmit more torque and are preferred for heavier gantry systems or high-speed CNC applications. Check your existing belt width before selecting.
Yes. These pulleys are machined to the HTD-5M standard (5mm pitch, curved tooth profile) and are compatible with any HTD-5M timing belt of the matching width (15mm or 20mm). They are not compatible with GT2, T5, or other belt profiles.
The aluminum alloy construction provides a good strength-to-weight ratio suitable for most 3D printer and light-to-medium CNC router applications. For very high-torque industrial CNC use, verify the load requirements against the pulley's rated capacity. The anodized surface adds wear resistance for extended duty cycles.
Set screw configuration varies by variant. Please refer to the product images or contact us to confirm set screw details for your specific tooth count and bore combination before ordering.
Yes. These HTD-5M pulleys are widely used in Voron, Prusa, RatRig, and other open-source 3D printer designs that specify HTD-5M belts. Always verify the tooth count and bore size specified in your printer's BOM (bill of materials) before purchasing.
Use the variant selectors above to choose your Number of Teeth, Applicable Belt Width, and Bore Width. If you are unsure, measure your existing pulley's tooth count, belt width, and shaft bore with calipers. You can also contact us with your machine model and we will help confirm the correct specification.
