cast iron plateform

cast iron plateform material HT200-300,usded to test the perpendicularity and parallelism , and can be used a verfication standard of 90°. We have standard size in stock, and for special size we can manfacture as your drawings or requirements Type(mm) Perpendicularity between adjacent measuring surface Flatness and strightness of measuring surface Flatness and straightness of datum surface Precision Grade(μm) 1 2 3 1 2 3 1 2 3 200*200 8 16 30 4 8 16 6 12 24 300*200 10 20 40 5 10 20 8 16 30 300*300 10 20 40 5 10 20 8 16 30 400*300 12 24 45 6 12 24 10 20 40 400*400 12 24 45 6 12 24 10 20 40 500*400 28 50 14 28 24 48 500*500 28 50 14 28 24 48 800*600 35 60 18 35 28 55