Surface plate in black granite. Compact, uniform and of high precision. For use in the metrology room. Black granite offers many advantages over cast iron: the possibility of manufacture to the smallest tolerances; absolute resistance to corrosion; non-magnetism; non-conductance; minimum wear over time. Lapped surface. Top quality manufacture to DIN 876/00 tolerances.
Item 581 is made to normal manufacturing standards and complies with DIN 876/0 tolerances.