The 40BB17 sprocket is a 17 tooth idler sprocket that works with any #40 ANSI roller chain. Idler sprockets use a sealed ball bearing that has a wide inner race. These idler sprockets can be fixed to a stationary shaft or the can be mounted to a sprocket tensioner arm. Our 40BB17H idler sprocket has hardened teeth to help minimize wear.
40BB17 5/8" Idler Sprocket Dimensions
ANSI Chain Size:40
Outside Diameter (D):2.975''
Length Thru Bore (W):11/16''
All dimensions listed are nominal values.
Made In USA
All idler sprockets are manufactured in America.
Teeth are hardened for better wear protection during service.
After the bearings are pressed into the sprocket, they're put through a riveting process to ensure the bearing stays securely inside the sprocket
Bearing are sealed to keep grease in and to keep abrasive materials out.