MEASURING EQUIPMENT

* Granite surface plates are made of black granite which is stronger and denser than light colored granite, more stable, and wears longer. * The granite properties determine the stiffness of the granite and accuracies can be guaranteed with less thickness than other types of granite * This translates to less freight and handling whenever the plate is shipped or moved. * These granite surface plates are manufactured from quality stable granite * Precision ground and polished * In June 2013, ASME replaced Fed Spec GGG-P-463C with the American National Standard (ANS) ASME B89.3.7 – 2013 Granite Surface Plates * ISO standard defines ISO8512-2 for granite surface plates, but it seems the current in use is still dating back 1990.[6] * These suraface plates are finished to workshop grade O