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Granite block master are made from selected black granite stone. Master squares are ideal for inspecting the X, Y and Z axes of machine tools. Our Granite block masters are very stable and rigid, providing the ultimate in squareness references. Our master squares have 5 finished faces (1 large face and 4 edges) finished flat, square and parallel to Grade–0 accuracy. All six faces can be finished upon request.

(mm) Accuracy 
300 x 300 x 50 5
400 x 400 x 63 6
630 x 630 x 80 8


Designed by Jadon Technologies