This 9-tooth sprocket is designed for use with ANSI #40 roller chains, offering reliable performance and durability. Crafted with precision, it features a Type B hub with set screws for secure installation on shafts with a 5/8" bore. Made from high-quality materials, this sprocket ensures smooth operation and efficient power transmission in various industrial and mechanical applications. Its robust construction withstands heavy loads and demanding environments, making it a reliable choice for your machinery needs. The 9 tooth sprocket for sale does not include keyway despite product images depicting keyway. Two 1/4" set screws are included for mounting.