Martin Sprocket & Gear 40BS22-1 Chain Sprocket is a replacement drive sprocket designed for use with #40 chain from Martin Sprocket & Gear. It is bored to size, so the bore is customized to fit your shaft precisely rather than a fixed diameter. This sprocket supports industrial chain-drive assemblies by transferring torque between a shaft and a #40 chain in equipment that uses 40-series chain.
