It is applicable for grinding internal circle of various bearing rings, grove and roller way of internal ring and external ring of the spherical bearing, roller way of internal ring and external ring of conical roller bearing and flange of internal ring and external ring of the roller bearing. The grinding diameter scope: 6mm-1600mm; roundness scope: 0.001m-0.006mm; diameter scope: 0.002mm-0.008mm; and roughness scope: Ra0.016-Ra0.8