Flat finishing is primarily the process of using a cup wheel to machine a workpiece’s face. The workpiece is clamped in a chuck and rotated. The rotating cup wheel is then precisely advanced to the workpiece’s surface.
Precision slides allow the finishing unit to be adjusted in multiple directions — thus giving the workpiece a characteristic “cross-hatch” pattern, in addition to concave or convex adjustments. With these capabilities a flat, concave, convex, or spherical surface can be produced. One key difference between double-disk grinding and flat finishing is that, for the latter process, the tool is self-dressed during the machining of components and regular wheel dressing is not necessary.