The precision of the Jingda granite surface plates is in line with the standards of advanced countries.
Tolerance of planeness: Standard
JB/T7975-1999
Grade 000 = 1 ( 1+d/1000 ) m
Grade 00 = 2 ...
We can supply Granite Inspection Surface Plate with n grades "00" and "0" that manufactured from carefully selected black granite. The min. size is 300x200x50mm and the max. size is 3000x4000x400mm.
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Alfa Granite Surface plates are provided with a certificate of accuracy traceable to National Standards.
Smooth bearing points protects of both surfaces and tools used on it.
High modulus of rigity....
Granite Surface Plates Granite surface plates are manufactured using natural black granite stone, quarried from earth in its natural form. These plates are precision lapped to high standards of flat...