This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Keyseating. en Pieces involved in keyseating On the left is the inner shaft in the middle is key and to the right is the mating part The key is inserted into the grooves in the shaft and mating part Scheremeg The keyway in the shaft has sharp corners This is unusual an very hard to manufacture Keys and keyways