The square is a professional measuring, referred to as the square, according to the material which can be divided into granite square, magnesium and iron square square, its relative position for verticality verticality and workpiece inspection work, sometimes also used for scribing. Suitable for machine tools, verticality inspection machinery equipment and spare parts processing, installation location, scribing, is an important measurement tools in the machinery industry, it is characterized by high precision, good stability, easy to repair.
Granite square, uses the high quality "Ji'nan green" stone by machining and manual fine grinding is made. The black gloss, precise structure, uniform texture, good stability, high strength, high hardness, can in the heavy load and maintain the high accuracy under temperature, and has no rust, acid and alkali resistance, wear resistance, not magnetic, the same type and so on.
Magnesium aluminium square is also called magnesium alloy square, light weight for easy carrying, not easy to deformation, yield point more than the general steel cast iron. For detecting, measuring, marking, equipment installation, construction of industrial engineering.
Cast iron square kind including square, special tool plate bending, suitable for machine tools, verticality inspection machinery equipment and spare parts processing, installation location, such as crossed is an important measurement tools in the machinery industry, it is characterized by high precision, good stability, easy to repair.
Iron ruler for detecting, measuring, marking, equipment installation, construction of industrial engineering.
Iron ruler before use, should first check the work surface and the edge is damaged. The long edge angle left, right and short side, below are the workpiece surface (i.e., internal and external angle). The ruler face and the detected face wipe.
Iron ruler when in use, the straight square rely on the measured workpiece surface, light gap method for identification of the angle of the workpiece is correct. Pay attention to light, light, light, prevent deflection.
Iron ruler for measuring results, the straight square flip 180 degrees and then measuring time, take two times reading arithmetic mean of the measurement results, which can eliminate the deviation square itself.