Problem this solves
Drive pulleys transfer torque while idler pulleys guide or tension belts; confusing their duty can result in incorrect bearings or surface geometry.
Specification steps
- 1State whether the pulley drives, is driven, or only guides the belt.
- 2Confirm belt profile, wrap angle, and required tracking.
- 3Verify bearing arrangement, shaft support, and operating speed.
Drive and idler duty comparison
| Requirement | Drive pulley | Idler pulley |
|---|---|---|
| Primary duty | Transfers torque | Routes or tensions belt |
| Key check | Bore and power capacity | Bearing, crown, and tracking |
Include with your RFQ
- Pulley duty
- Belt profile and dimensions
- Shaft or bearing details
- Speed, load, and routing layout
Before ordering
Confirm the installed belt profile, shaft fit, operating speed, and application duty before approving a replacement.