Granite Inspection Surface Plate,Granite Surface Plate, Surface Plate

The precision of the jingda granite surface plates is in line with the standards of advanced countries. Tolerance of planeness: standard jb/t7975-1999 grade 000 = 1 × ( 1+d/1000 ) μm grade 00 = 2 × ( 1+d/1000 ) μm grade 0 = 4 × ( 1+d/1000 ) μm grade 1 = 8 × ( 1+d/1000 ) μm ( "d" is the diagonal mm ) (the measuring temperature is normally 20±2℃