High-Strength Corrosion-Resistant HTD Timing Belt Pulleys
Move belts forward and backward or stop and start them in precise positions, especially in areas where rust is a concern. The curved teeth on these high-torque drive (HTD) pulleys have more surface contact with belts than traditional trapezoidal teeth, which allows you to apply more torque without damaging belts. These teeth fit together seamlessly to prevent backlash, or unwanted movement of the belt on the pulley, for a smooth, quiet cycle. These pulleys are often used in 3D printing, machine tool drives, robotics, and other applications where precision is essential. They are also known as curvilinear belt pulleys.
Pair pulleys with an HTD timing belt that has the same pitch. The width of your belt should not be larger than the maximum belt width listed.
Aluminum pulleys will not rust in damp or humid environments, but water left on the surface will cause them to corrode.
| OD, mm | Number of Teeth | Pitch, mm | For Shaft Dia. | Bore Type | Inside Wd., mm | Outside Wd., mm | Overall Wd., mm | Pitch Dia., mm | Number of Flanges | Fabrication | Hub Dia., mm | Each | |
For 6 mm Max. Belt Wd. | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 41.28 | 40 | 3 | 1/4" | Finished | 7.11 | 10.34 | 18.11 | 38.2 | 2 | Machined | 29.21 | 00000000 | 000000 |
For 9 mm Max. Belt Wd. | |||||||||||||
| 41.28 | 40 | 3 | 1/4" | Finished | 11.35 | 13.39 | 21.16 | 38.2 | 2 | Machined | 29.21 | 00000000 | 00000 |
High-Strength GT Timing Belt Pulleys
For higher speed or higher torque applications, these GT series timing belt pulleys provide a more precise fit than HTD pulleys. Use them where accuracy is critical, such as in storage and retrieval systems or in robotics. Similar to HTD timing belt pulleys, their teeth are curved for high strength. The curved teeth create positive grip engagement with timing belts, so these pulleys do not require re-tensioning—unlike drives using V-belts or sheaves. And unlike chain drives, there’s no metal-on-metal contact, so these pulleys don’t require lubrication.
Anodized aluminum pulleys are lightweight and resist corrosion. They have a finished bore and come with set screws for mounting on shafts.
For technical drawings and 3-D models, click on a part number.
| Number of Teeth | Pitch, mm | For Shaft Diameter | Bore Type | Inside Width, mm | Outside Width, mm | Overall Width, mm | Pitch Diameter, mm | Number of Flanges | Fabrication | Material | Hub Diameter, mm | Each | |
For 9 mm Maximum Belt Width | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 3 | 1/4" | Finished | 10.16 | 13.46 | 21.16 | 38.202 | 2 | Machined | Anodized Aluminum | 29.21 | 00000000 | 000000 |