System of Measurement System of Measurement |
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For Belt Width For Belt Width |
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Pulley Type Pulley Type |
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 | Idler |
For Belt Type For Belt Type |
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Width Width |
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Shaft Mount Type Shaft Mount Type |
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 | Slip Fit |
For Shaft Type For Shaft Type |
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 | Round |
Bore Type Bore Type |
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 | Finished |
Number of Grooves Number of Grooves |
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Bearing Material Bearing Material |
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Bearing Seal Type Bearing Seal Type |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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Fabrication Fabrication |
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Flat-Belt Idler Pulleys
Nylon Plastic
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).
Nylon pulleys are lightweight and corrosion resistant. 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 | ||||||||
|---|---|---|---|---|---|---|---|---|
| 5/8" | 3 1/2" | 3/8" | 3" | 1 3/32" | 0.25" | Nylon Plastic | 0000000 | 000000 |
| 5/8" | 3 1/2" | 1/2" | 3" | 1 3/32" | 0.25" | Nylon Plastic | 0000000 | 00000 |
| 11/16" | 2 1/2" | 0.635" | 2 1/4" | 7/8" | 0.125" | Cast Iron | 0000000 | 00000 |
| 13/16" | 2.8" | 3/8" | 2 33/64" | 1 7/32" | 0.11" | Nylon Plastic | 0000000 | 00000 |
| 13/16" | 2.8" | 1/2" | 2 33/64" | 1 7/32" | 0.11" | Nylon Plastic | 0000000 | 00000 |
| 13/16" | 3 1/2" | 3/8" | 3" | 1 7/32" | 0.25" | Nylon Plastic | 0000000 | 00000 |
| 13/16" | 3 1/2" | 1/2" | 3" | 1 7/32" | 0.25" | Nylon Plastic | 0000000 | 00000 |
| 7/8" | 2.4" | 3/8" | 2" | 1 5/32" | 0.18" | Nylon Plastic | 0000000 | 00000 |
| 7/8" | 2.4" | 1/2" | 2" | 1 5/32" | 0.18" | Nylon Plastic | 0000000 | 00000 |
| 7/8" | 3" | 3/8" | 2 1/2" | 1 5/16" | 0.25" | Nylon Plastic | 0000000 | 00000 |
| 7/8" | 3" | 1/2" | 2 1/2" | 1 5/16" | 0.25" | Nylon Plastic | 0000000 | 00000 |
| 7/8" | 5.6" | 3/8" | 5 1/32" | 1 19/64" | 0.26" | Nylon Plastic | 0000000 | 00000 |
| 7/8" | 5.6" | 1/2" | 5 1/32" | 1 19/64" | 0.26" | Nylon Plastic | 0000000 | 00000 |
| 29/32" | 4 1/2" | 3/8" | 4" | 1 25/64" | 0.25" | Nylon Plastic | 0000000 | 00000 |
| 29/32" | 4 1/2" | 1/2" | 4" | 1 25/64" | 0.25" | Nylon Plastic | 0000000 | 00000 |
| 1 1/16" | 4 1/2" | 0.635" | 4" | 1 7/16" | 0.25" | Cast Iron | 0000000 | 000000 |
| 1 1/8" | 2.1" | 3/8" | 1 7/8" | 1 35/64" | 0.09" | Nylon Plastic | 0000000 | 00000 |
| 1 1/8" | 2.1" | 1/2" | 1 7/8" | 1 35/64" | 0.09" | Nylon Plastic | 0000000 | 00000 |
| 1 1/8" | 3.4" | 3/8" | 2 31/32" | 1 43/64" | 0.2" | Nylon Plastic | 0000000 | 00000 |
| 1 1/8" | 3.4" | 1/2" | 2 31/32" | 1 43/64" | 0.2" | Nylon Plastic | 0000000 | 00000 |
| 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 | 00000 |
| 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 |