Precision Granite Cube 18 x 18 x 18 Grade A 6 side

These precision granite cubes are used for alignment and measuring squareness, parallelism and perpendicularity of machining centers or coordinate measuring machines. The cubes are finished on all 6 sides to Grade A, a tolerance of 0.0001 inch (other grades available). Each cube is equipped with one (1) 3/4-10 threaded insert for mounting a lifting ring.

All of the precision granite-cubes we provide are manufactured to meet or exceed tolerances specified by Federal Specification GGG-P-463c, ASME B89 3.7-2013 or manufacturers specfications as applicable.   

A Calibration Certificate for precision granite is included with every unit when purchased. An ISO-17025 A2LA acredited certificate is available for an addition charge.

Shipping Instructions:
This product weighs 875 lbs. Shipping costs are not included in the price. We prefer you to supply us with the LTL Freight Shipper of your choice. If you do not have a preferred shipper we will supply you with a freight quotation which will be added to your order.