Grinding the working faces of a key ensures parallelism, straightness and a precision surface finish, allowing the key to be driven into the keyway with no play.

When a key with correct parallelism and straightness is fitted without play in a properly machined keyway, it withstands high loads and does not work loose. A key that remains securely seated does not create hammering or impact loading on the connected components. As a result, the hub keyway, gear pitch circle, bearings, bearing housings and shaft keyway are protected from impact-related damage. This extends component service life and helps deliver a reliable, trouble-free product that supports customer satisfaction.