the working table can b e lifted, lowered and swiveled by hand with the help of rack & verm gear. the machine is tested for accuracy and conforms to indian standard is : 2426. spindle, shafts and gears are made of high grade alloy steel, carburised, case hardened and precision ground. columns are made of medium carbon steel. wide range of selectable spindle speeds depending on the component to be tapped. speed controlled by pulley drive. accurate tapping of a wide range of materials including aluminium and steel. special anti-corrosive paint. repeat and single cycle. .