Customer errored on the required speed of his equipment.  Ran for a few minutes then removed.  The removal bolt marks can be seen on the hub side.  Besides those marks they are like factory condition.His error your gain. This Gates 8M-25S-12 JA poly chain pulley is a reliable and durable option for your industrial automation and motion control needs. With 25 teeth and a belt width of 12mm, this timing belt pulley is designed to provide efficient performance and long-lasting service.

The brand Gates is known for its quality products, and this model is no exception. It is perfect for use in a variety of industries and applications. Whether you're in need of a replacement or an upgrade, this pulley is a great choice.