Chamfer
A chamfer is the edge that transitions between two faces or areas of an object. Chamfer holes are typically used in order to make the insertion of a screw, a pin, a bushing, or any other assembly component easier. The specific tolerance of the diameter and angle in a chamfer hole is not so important because they are not crucial to the functionality of the chamfer. Chamfers tend to range in angle and can go anywhere from 0 to 130 degrees.