Master Square with master block are made from selected black granite stone. Master squares are ideal for insp ecting the X, Y and Z axes of machine tools. Our Square granite master block are very stable and rigid, providing the ultimate in squareness references. Our Granite square 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.

Granite Block Master (Square)


Size (mm) Accuracy (um)
300 X 300 X 50 5
400 X 400 X 63 6
630 X 630 X 80 8