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Number of Teeth Number of Teeth |
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System of Measurement System of Measurement |
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OD OD | Show |
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OD OD | Hide |
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ID ID |
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Roller Chain Trade Size Roller Chain Trade Size |
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For Shaft Type For Shaft Type |
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![]() | Round |
Bearing Seal Type Bearing Seal Type |
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Bore Type Bore Type |
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![]() | Finished |
For Shaft Diameter For Shaft Diameter |
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Roller Chain Standard Roller Chain Standard |
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Hub Diameter Hub Diameter |
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Material Material |
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Sprocket Type Sprocket Type |
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For Roller Chain Strand Type For Roller Chain Strand Type |
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![]() | Single |
REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Overall Width Overall Width |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Shaft Mount Type Shaft Mount Type |
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Teeth Heat Treatment Teeth Heat Treatment |
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Bearing Material Bearing Material |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Bearing Type Bearing Type |
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![]() | Ball |
About Roller Chain and Sprockets
More
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 | |||||||||
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Number of Teeth | For Shaft Dia. | OD | Overall Wd. | Hub Dia. | Material | Type | Material | Each | |
For ANSI 50 Roller Chain (5/8" Pitch) | |||||||||
39 | 3/4" | 8.12" | 39/64" | 1 3/4" | Steel | Ball | Steel | 00000000 | 0000000 |