Workpiece surface Internal Grinding  is generally clamped on the table, or by electromagnetic suction fixed in the electromagnetic work bench , and then use the wheel perimeter or face grinding workpiece surface grinder ; centerless grinding usually centerless cylindrical grinding , that do not work top or the centering chuck and support , while the outer surface of the workpiece to be ground for locating surface of the workpiece is located between the grinding wheel and guide wheel , supported by the pallet , this grinding machines, high efficiency, easy to automate , multi-purpose in mass production . Tool grinder is designed for tool manufacturing and tool sharpening grinder, a universal tool grinder , drill grinding machines , pull the blade grinders, tool grinders and other curves , multi- tool factory and machinery factory for the tool shop . Abrasive belt grinding machine is fast moving belt as abrasive, workpiece supported by the conveyor belt , efficiency several times higher than other grinders , power consumption is only a fraction of other grinders , mainly used for processing large-size panels , heat difficult materials and mass production of flat parts. Specialized grinder is specifically a certain type of grinding parts such as crankshafts, camshafts, splined shafts , rails, blades, bearings and gears and threaded raceway other grinder. In addition to these categories , there are honing machines, grinding machines, jig grinders and grinding machines and other types of billets .