Ball drifting is a method of finishing an internal diameter, low cost high productivity, By forcing a precision ground, Tungsten carbide ball through a slightly under sized Pre machined Hole, using a push rod. This cold working of the hole wall, produces work Hardening, that is usually highly desirable, for it gives improved wear resistance.

The link plates can be positioned at different pitches. These balls are pushed through the Hole after chamfering.