* Main characteristics of this machine tools * Feed and compensation of machine tools executed by two non-interference drive mechanisms. The feed system has the function of fixed-stroke grinding and adopts manual or hydraulic feed method. * The machine tool is equipped with fast hopping mechanism. Therefore, the tool does not need to be adjusted after the grinding wheel is withdrawn for measurement or dressing. * The work table is started by hydraulic switch valve to ensure instant security during assembly and disassembly of work piece. * In case of a special order, the machine tool can be equipped with high-speed grinding wheel spindle of 1800 r/min to adopt to the grinding requirement of 20-50mm hole.