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