Idler Sprockets: Ball Bearing Idler Sprockets have sealed ball bearings with extended inner competition and setscrews for securing to the shaft.
Projection From Centerline - Due to dimensional variation among bearing producers this dimension can vary greatly slightly when different brands of bearings are used. For those who have a critical application please demand specific dimensions.
Inner Race projection provides 2 established screws on long part to secure bearing to shaft.
“Basic Dynamic Ratings” calculated according to AFBMA standard for “Long Rating And Fatigue Existence For Ball Bearings”
Accurately machined, medium carbon steel sprockets and precision surface ball bearings are assembled to provide a heavy duty idler for the many severe conditions. The bearings are pre-lubricated and sealed to retain grease and exclude dirt and moisture. They are not re-lubricatable. The extended inner race with setscrew allows fastening to a pin or shaft without collars or spacing devices. In addition, it provides clearance for the chain when bolting the sprocket directly to a body member or tensioning gadget. A small sprocket for close quarters and a larger one for heavier program is provided in each pitch. If sizes other than those listed 
are needed, make sure you inquire for quotation.
