Cast-iron flat stiffness checks device to comprise by following part: 1, comparator, the commonly used comparator that twist reed, its installation is in horizontal fine grain is mid; 2, weight used on a balance (load) ; 3, pedestal of weight used on a balance, it finds a place for it is in the center of flat working face, not as due as crossbeam any join; 4, crossbeam, along diagonal of flat working face direction is installed, its due and enough tigidity; 5, space block, use bracket beam; 6, flat. Flat stiffness checks device to check a method is in job of the flat that be measured jacket good test device, when adding weight, comparator measure head and working face to connect touch (to make measure accurate. Can measuring a thin gauge block) is put between head and working face, write down next reading. The load that presses a regulation next brings to bear on on bracket weight used on a balance, write down again right now the reading of comparator. The absolute value that twice the algebra of reading needs, the deflection that falls in rated load for this flat namely is worth. Should observe whether comparator restores the reading when carrying for nothing after debus is laden, if fail to recover from an illness, should analyse its reason and check afresh. CNC MillingCNC Machining