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 sprockets dimensional variation among bearing manufacturers this dimension may vary slightly when different brands of bearings are used. In case you have a crucial application please demand specific dimensions.
Inner Race projection provides 2 arranged screws on long aspect to secure bearing to shaft.
“Basic Dynamic Rankings” calculated according to AFBMA standard for “Long Rating And Fatigue Life For Ball Bearings”
Accurately machined, medium carbon steel sprockets and precision floor ball bearings are assembled to supply much duty idler for the the majority of serious conditions. The bearings are pre-lubricated and sealed to retain grease and exclude dirt and moisture. They are not re-lubricatable. The extended internal race with setscrew allows fastening to a pin or shaft 
