The pad iron is an indispensable part in the production line. It is put under the machinery, support the mechanical weight, with the function of shock absorption, is commonly used for numerical control machine tools to attenuate the vibration of the machine itself, reduce the transmission of vibration force, it will prevent the transmission of vibration force, the horizontal height of the machine tool can also be adjusted. Widely used in a variety of processing equipment, food machinery production lines. According to the different role is divided into adjustment pad iron, shock-absorbing pad iron, shock-proof pad iron. According to different materials are divided into steel plate shim (thickness of 0.3 ~ 20 mm) and cast iron shim (thickness of 20 mm or more) . According to the shape of the pad iron, can be divided into flat pad iron, inclined pad iron and adjustable pad iron. The miter must be used in pairs. The dimensions of flat or inclined pads can be chosen according to the weight of the equipment.