Timing Belt Idler Pulleys

Our free-spinning pulleys are the perfect addition to your timing belt setup, helping to reduce vibration and prevent belt wear. A needle bearing at the center of each pulley is lined with small cylindrical rollers that minimize friction during rotation, allowing both the pulley and shaft to spin independently. Made from sturdy iron or steel, these pulleys are highly durable and wear-resistant, and the black oxide coating protects against corrosion in dry environments. The trapezoidal teeth on the outside of each pulley match the teeth inside your timing belt, ensuring a secure fit. Make sure to choose a pulley that matches your belt trade size, with a maximum width that's equal to or greater than the width of your timing belt.
SKU | For Shaft Dia. | OD | Material | Pitch (mm) | Bore Type | Overall Wd. | Pitch Dia. | Hub Dia. | Number of Teeth | Fabrication | For Max. Belt Wd. | Bearing Type | Dia. |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Metric—Press-Fit Mount | |||||||||||||
For GT2 Belt Trade Size | |||||||||||||
UA6A_16V12 | 30mm | 100mm | Black-Oxide Iron | 8mm | Plain | 91.19mm | 91.67mm | 79.5mm | 36 | Machined | 62mm | Needle Roller | 90.07mm |
UA6A_16V11 | 40mm | 146mm | Black-Oxide Iron | 14mm | Plain | 58.67mm | 133.68mm | 111mm | --- | Machined | 37mm | Needle Roller | 130.89mm |
UA6A_16V10 | 20mm | 90mm | Black-Oxide Iron | 8mm | Plain | 45.97mm | 81.48mm | 69.85mm | 32 | Machined | 21mm | Needle Roller | 79.88mm |
For GT Belt Trade Size | |||||||||||||
UA6A_16V9 | 30mm | 100mm | Black-Oxide Iron | 8mm | Plain | 48mm | 91.67mm | --- | 36 | Machined | 30mm | Needle Roller | 90.3mm |
UA6A_16V8 | 20mm | 90mm | Black-Oxide Iron | 8mm | Plain | 46.23mm | 81.48mm | 69.85mm | 32 | Machined | 20mm | Needle Roller | 80.12mm |
Inch—Press-Fit Mount | |||||||||||||
For XL Belt Trade Size | |||||||||||||
UA6A_16V7 | 12.7mm | 35.6mm | Black-Oxide Steel | 5.1mm | Plain | 19.0mm | 35.6mm | --- | 22 | Machined | 19.0mm | Needle Roller | 34.9mm |
UA6A_16V6 | 12.7mm | 38.1mm | Black-Oxide Steel | 5.1mm | Plain | 12.7mm | 38.8mm | 30.7mm | 24 | Machined | 12.7mm | Needle Roller | 38.1mm |
For L Belt Trade Size | |||||||||||||
UA6A_16V5 | 25.4mm | 66.0mm | Black-Oxide Steel | 9.5mm | Plain | 28.6mm | 66.7mm | 44.4mm | 22 | Machined | 25.4mm | Needle Roller | 65.9mm |
UA6A_16V4 | 25.4mm | 53.3mm | Black-Oxide Steel | 9.5mm | Plain | 28.6mm | 54.6mm | 44.4mm | 18 | Machined | 25.4mm | Needle Roller | 54.0mm |
For H Belt Trade Size | |||||||||||||
UA6A_16V3 | 25.4mm | 71.1mm | Black-Oxide Iron | 12.7mm | Plain | 79.4mm | 72.8mm | 44.4mm | 18 | Machined | 76.2mm | Needle Roller | 63.5mm |
UA6A_16V2 | 25.4mm | 63.5mm | Black-Oxide Steel | 12.7mm | Plain | 54.0mm | 64.7mm | 47.0mm | 16 | Machined | 50.8mm | Needle Roller | 63.5mm |
UA6A_16V1 | 25.4mm | 63.5mm | Black-Oxide Steel | 12.7mm | Plain | 28.6mm | 64.7mm | 45.7mm | 16 | Machined | 25.4mm | Needle Roller | 63.5mm |