granite parallels

granite parallels granite master square granite measuring DESCRIPTION granite parallels specifection 2 face-finished on narrow edges face-finished on narrow and wider edges Pecification (mm) Flatness of working surface¶llelism of opposite surface Squareness between working surface Tolerance of h.w.between a matched pair Precision grade (μm) 00 0 00 0 00 0 160×25×16 1.5 3 20 40 1.5 3 250×40×25 2 4 30 60 2 4 400×63×40 4 8 40 80 4 8 630×100×63 6 12 50 100 6 12 Willing is