Flat-Belt Idler Pulleys
Cast Iron
Steel
These pulleys spin freely on built-in bearings to maintain tension for reduced wear and vibration. They’re often used with belt tensioners (sold separately).
Steel and cast iron pulleys are more durable than nylon pulleys.
Pulleys with ball bearings ensure proper positioning inside a tube or housing. They’re sealed to block out dust and contaminants better than pulleys with needle roller bearings.
Pulleys with needle roller bearings minimize internal friction.
For technical drawings and 3-D models, click on a part number.
| For Belt Wd. | OD | For Shaft Dia. | Dia. | Wd. | Groove Dp. | Material | Each | |
With Ball Bearings | ||||||||
|---|---|---|---|---|---|---|---|---|
| 11/16" | 2 1/2" | 0.635" | 2 1/4" | 7/8" | 0.125" | Cast Iron | 0000000 | 000000 |
| 1 1/16" | 4 1/2" | 0.635" | 4" | 1 7/16" | 0.25" | Cast Iron | 0000000 | 000000 |
| 2 1/16" | 4 1/2" | 0.635" | 4" | 2 7/16" | 0.25" | Cast Iron | 0000000 | 000000 |
| 3 1/16" | 4 1/2" | 0.635" | 4" | 3 7/16" | 0.25" | Cast Iron | 0000000 | 000000 |
| 4 1/2" | 7" | 1" | 6" | 5" | 0.5" | Cast Iron | 0000000 | 000000 |
| 6 1/4" | 7" | 1" | 6" | 6 3/4" | 0.5" | Cast Iron | 0000000 | 000000 |
With Needle Roller Bearings | ||||||||
| 7/16" | 1.4" | 1/2" | 1 1/8" | 5/8" | 0.125" | Steel | 000000 | 00000 |
| 9/16" | 1.8" | 1/2" | 1 3/8" | 13/16" | 0.187" | Steel | 000000 | 00000 |
| 11/16" | 2 1/2" | 1" | 2 1/4" | 7/8" | 0.125" | Steel | 000000 | 00000 |
| 1 1/16" | 4 1/2" | 1" | 4" | 1 7/16" | 0.25" | Cast Iron | 000000 | 00000 |
| 2 1/16" | 4 1/2" | 1" | 4" | 2 7/16" | 0.25" | Cast Iron | 000000 | 000000 |
| 3 1/16" | 4 1/2" | 1" | 4" | 3 7/16" | 0.25" | Cast Iron | 000000 | 000000 |
| 4 1/2" | 7" | 1 1/2" | 6" | 5" | 0.5" | Cast Iron | 0000000 | 000000 |