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About Roller Chain and Sprockets
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Wear-Resistant Idler Sprockets for ANSI Roller Chain
Hardened teeth give these steel sprockets increased wear resistance for a long service life. Designed to rotate freely on built-in bearings, idler sprockets maintain constant tension on your drive by pressing against your chain to take up slack and reduce wear and vibration. They are for use with roller chain tensioners.
Ball bearings are double sealed to keep dirt out.
For technical drawings and 3-D models, click on a part number.
Bearing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of Teeth | For Shaft Dia. | OD | Overall Wd. | Hub Dia. | Material | Type | Material | Each | |
For ANSI 35 Roller Chain (3/8" Pitch) | |||||||||
| 19 | 1/2" | 2.47" | 23/32" | 1 9/16" | Steel | Ball | Steel | 000000 | 000000 |
| 20 | 5/8" | 2.59" | 23/32" | 1 9/16" | Steel | Ball | Steel | 0000000 | 00000 |
For ANSI 40 Roller Chain (1/2" Pitch) | |||||||||
| 17 | 5/8" | 2.98" | 23/32" | 1 9/16" | Steel | Ball | Steel | 0000000 | 00000 |
| 25 | 5/8" | 4.26" | 23/32" | 1 9/16" | Steel | Ball | Steel | 00000000 | 00000 |
| 35 | 5/8" | 5.86" | 23/32" | 1 9/16" | Steel | Ball | Steel | 00000000 | 00000 |
| 48 | 5/8" | 7.93" | 23/32" | 1 9/16" | Steel | Ball | Steel | 00000000 | 00000 |
For ANSI 41 Roller Chain (1/2" Pitch) | |||||||||
| 18 | 1/2" | 3.14" | 23/32" | 1 9/16" | Steel | Ball | Steel | 000000 | 00000 |
| 18 | 5/8" | 3.14" | 23/32" | 1 9/16" | Steel | Ball | Steel | 000000 | 00000 |
For ANSI 50 Roller Chain (5/8" Pitch) | |||||||||
| 15 | 5/8" | 3.32" | 23/32" | 1 9/16" | Steel | Ball | Steel | 0000000 | 00000 |
For ANSI 60 Roller Chain (3/4" Pitch) | |||||||||
| 12 | 5/8" | 3.25" | 23/32" | 1 9/16" | Steel | Ball | Steel | 00000000 | 00000 |
| 13 | 5/8" | 3.49" | 23/32" | 1 9/16" | Steel | Ball | Steel | 0000000 | 00000 |