Acumac machine tools pvt ltd are a reputed manufacturer of machines and machine tool accessories. They manufacture acumac over beck internal grinding machine model zetto-30, under technical collaboration with m/s. Over beck gmbh, germany. These machines are generally used for economical internal grinding of small work pieces of carbide, ceramic & tungsten material. The machine can also be used as an external grinder by using suitable attachment. Table stroke movement is obtained through gear box and variable speed drive without hydraulics.