Square Box - Marking Square Box - Inspection Square Box

Cast iron square box is mainly used for checking the parallelism and perpendicularity of components and supporting workpieces during marking. It is generally a cube or rectangular prism with the same side length, and can be made into various specifications of cast iron according to user requirementssquare boxAnd rectangular tube.
cast ironsquare boxEach working face must be free of rust, scratches, cracks, dents, and other defects that affect the metrological performance.
cast ironsquare boxVerification method: For cast iron with a side length of 300mm or lesssquare boxDuring inspection, cast iron is usedsquare boxPlace 1mm measuring blocks at each end of the inspected surface, place the blade ruler on the working surface of the measuring block, and then use measuring blocks to test the plug at each inspected point. The difference between the size of the equivalent block group just inserted and the size of the measuring blocks at both ends is the deviation between the two ends of the inspected point. This test should also be conducted on cast ironsquare boxConducted on several cross-sections in the longitudinal, transverse, and diagonal directions of the working face. In cast ironsquare boxWhen the error direction of the straight lines measured at each position is consistent, take the larger value. When the error direction is not consistent, take the sum of the large positive and negative differences, which is cast ironsquare boxThe flatness of the inspected surface plane.