Timing Belt Idler Pulleys
Add these free-spinning pulleys to your timing belt setup to minimize vibration and keep belts from wearing out. The needle bearing at the center of these pulleys is lined with small, cylindrical rollers that reduce friction as they rotate. This bearing allows both the pulley and the shaft it’s mounted on to spin independently. Made from iron or steel, these pulleys are strong and wear-resistant. The black oxide coating protects the pulleys from corrosion in dry environments.
Curved teeth 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. They are also known as curvilinear belt pulleys.
For technical drawings and 3-D models, click on a part number.
For Max. Belt Wd., mm | OD, mm | Number of Teeth | Teeth Shape | Pitch, mm | For Shaft Dia., mm | Dia., mm | Bore Type | Inside Wd., mm | Outside Wd., mm | Overall Wd., mm | Pitch Dia., mm | Number of Flanges | Fabrication | Material | Bearing Type | Hub Dia., mm | Each | |
For GT Belt Trade Size | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
20 | 90 | 32 | Curved | 8 | 20 | 80.12 | Plain | 20 | 31.5 | 46.23 | 81.48 | 2 | Machined | Black-Oxide Iron | Needle Roller | 69.85 | 0000000 | 0000000 |
For GT2 Belt Trade Size | ||||||||||||||||||
21 | 90 | 32 | Curved | 8 | 20 | 79.88 | Plain | 21 | 31.5 | 45.97 | 81.48 | 2 | Machined | Black-Oxide Iron | Needle Roller | 69.85 | 0000000 | 000000 |