50B21 Sprocket, 50BS21, 21 Tooth Sprocket
Carbon steel with heat treated teeth, 2 set screws and keyway OD:4.521"
Please choose your required bore size
50B21 Sprocket. This Sprocket is for use with #50 Roller Chain, and has 21 Teeth. The number on your sprocket might be 50 B 21,50BS21. This roller chain sprocket has hardened teeth for long life of the sprocket.