Ultra precision machining is an abrasive precision machining method that uses fine abrasive stones mounted on a vibrating head to perform micro cutting of the workpiece. The main purpose of ultra precision machining is to reduce the Ra value, up to 0.2 to 0.012 μ m. The shape accuracy can be appropriately improved. Ultra precision machining has a high productivity and is commonly used to process the outer, inner, planar, channel surfaces, and spherical surfaces of crankshafts, rollers, bearing rings, and certain precision parts.

In machining, the process of achieving high accuracy and surface quality requirements for a workpiece. Generally, it is performed after rough machining and semi finishing. Finishing can be divided into high gloss and precision grinding, including precision grinding, ultra precision grinding, and mirror grinding. Using precision machining technology can comprehensively improve the machining accuracy and surface quality of the workpiece.