The Timken Company - Roller Chain Idler Sprockets

Smarter Bearing Selection Is Here

The Timken ^® Syber ^® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

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Analyze Bearing Performance in an Application with Timken ^® Syber ^® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

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Simplified Gear Force Analysis

Alex Waye, Timken Application Engineer, shows you how to instantly compute tangential, radial, and axial forces for better design decisions.

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ROLLER CHAIN IDLER SPROCKETS

The sintered-steel sprockets are hardened and perform well at an economical cost.
The roller chain idler sprocket replaces the hardenedplate steel sprockets on most applications.
All units are non-relubricatable.

To order, specify SPROCKET NUMBER.
Example: 010-5017S Idler Sprocket.
Order all bearings with E8728 specification.

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Unit of Measure

Items	008-4018-S Roller Chain Idler Sprockets	008-5017-S Roller Chain Idler Sprockets	008-6015-S Roller Chain Idler Sprockets	010-4018-S Roller Chain Idler Sprockets	010-5017-S Roller Chain Idler Sprockets
Bearing No.	N/A 203KRR5	N/A 203KRR5	N/A 203KRR5	N/A 203KRR2	N/A 203KRR2
Bore - d1	N/A 13.08 / 12.95 mm0.5150 / 0.5000 in	N/A 13.08 / 12.95 mm0.5150 / 0.5000 in	N/A 13.08 / 12.95 mm0.5150 / 0.5000 in	N/A 16.26 / 16.13 mm0.6400 / 0.6350 in	N/A 16.26 / 16.13 mm0.6400 / 0.6350 in
A.S.A. Chain No.	N/A 40	N/A 50	N/A 60	N/A 40	N/A 50
No. of Teeth	N/A 18	N/A 17	N/A 15	N/A 18	N/A 17
Pitch	N/A 12.7 mm1/2 in	N/A 15.9 mm5/8 in	N/A 19.0 mm3/4 in	N/A 12.7 mm1/2 in	N/A 15.9 mm5/8 in
Dimension P	N/A 73.13 mm2.879 in	N/A 86.36 mm3.400 in	N/A 91.62 mm3.607 in	N/A 73.13 mm2.879 in	N/A 86.36 mm3.400 in
Dimension D	N/A 79.88 mm3.145 in	N/A 94.72 mm3.729 in	N/A 101.32 mm3.989 in	N/A 79.88 mm3.145 in	N/A 94.72 mm3.729 in
Dimension A	N/A 7.21 mm0.284 in	N/A 8.71 mm0.343 in	N/A 11.66 mm0.459 in	N/A 7.21 mm0.284 in	N/A 8.71 mm0.343 in
Dimension F	N/A 24.43 mm0.962 in
Dimension B	N/A 18.29 mm0.72 in
Bearing Radial Load Rating at 500 RPM	N/A 3550 N800 lb
Weight	N/A 0.2 Kg0.44 lb	N/A 0.299 Kg0.66 lb	N/A 0.417 Kg0.92 lb	N/A 0.2 Kg0.44 lb	N/A 0.299 Kg0.66 lb