Centerless grinding uses a machine that consists of one abrasive grinding wheel and one regulating wheel that serves as a brake and controls the speed of the part being ground. A workrest fixture supports the part between the wheels.
Centerless polishing is usually an added step to improve the finish on a part. The polishing machine does not remove stock from the part; it is akin to sanding with a very fine grade of sandpaper.
Precision straightening is needed when a part is bent and is placed with fixturing on either end or at each end. Force is then used with a hydraulic ram to mechanically straighten the part. It bears down on a specific area to force the part to “flex,” thereby straightening the part. Corrections down to 0.001 are possible with Walenta’s precision machinery. This step is sometimes taken to improve part geometry in the centerless grinding process.