Semiautomatic machine is used for grinding smooth, stepped, conical and shaped surfaces such as rotary bodies by method of plunge or through grinding. Products from cast iron, steel, non-ferrous metals and their alloys are ground before and after heat treatment, as well as products from various non-metallic materials (textolite, glass, etc.) with the appropriate selection of abrasive tools and material of the supporting knife. Grinding wheel spindle is made on hydrodynamic bearings. Semiautomatic machines are equipped with mechanisms for automatic dressing of the grinding wheel and the grinding wheel’s subadjustment. On the basis of semiautomatic devices, when equipped with loading/unloading device, special automatic machines can be manufactured.