Martin Sprocket and Gear 40BS30 sprocket wheel is a keyed, set-screw style sprocket designed to mount on a shaft with a 7/8 inch bore. The keyed interface plus a set screw securely transmits torque to the shaft, helping prevent slip in drive assemblies. This 40BS30 configuration from Martin Sprocket and Gear is intended for use in equipment that relies on a shaft-mounted sprocket to drive a chain system.
