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Five-Face Granite Master Squares are popular for accurately checking the X-Y-Z axes on CNC machine tools and coordinate measuring machines.
Lying in the horizontal position, the X and Y axes can be checked for 90º squareness. With the square in the vertical position, tracing along the vertical edge of the square can check the perpendicularity of the Z axis. By tracing along the top edge of the square while in the vertical position, it will check parallelism of the table in the X and Y axes.
Five-face master squares may also be used on any work that requires the checking of squareness or parallelism.
Five-Face Master Squares Dimensions
Length x Height x Thickness Inch mm
Weight Lb kg Accuracy Grade – EDP
AA Laboratory .000025"/6" TIR (0.0006/150mm)
12 x 12 x 3 300 x 300 x 75 41 19 81919 14 x 14 x 3 350 x 350 x 75 56 25 81922 16 x 16 x 4 400 x 400 x 100 98 44 81925 24 x 24 x 4 600 x 600 x 100 220 100 81931 36 x 36 x 6 900 x 900 x 150 855 388 81933 24 x 24 and larger have a thru-hole for lifting with a sling.
A Inspection .000050"/6" TIR (0.0012/150mm)
81920 81923 81926 81932 81934
GRANITE PARALLELS
Produced in four standard sizes, Granite Parallels are useful in setting up work on surface plates and machine tables. They can also be used to elevate work above the surface of a plate to enable quick and easy inspection of piece parts with shoulders or steps.
Available in matched pairs, finished flat and parallel on two opposite narrow faces or all four faces. Parallels are sold in matched pairs. Single parallels available by request. Storage cases are available at extra cost.
Granite Parallels Length x Width x Thickness
Inch mm
6 x .75 x 1 150 x 19 x 25 12 x 1 x 2 300 x 25 x 50 18 x 1.5 x 3 450 x 37.5 x 75 24 x 2 x 4 600 x 50 x 100
Grade AA Laboratory
.000025"/6" TIR (0.0006/150mm) 2-Face 4-Face
Grade A Inspection
.000050"/6" TIR (0.0012/150mm)
.000025 0.0012
Inch mm EDP EDP Inch mm EDP 81691 81692 81695 81696 81699 81700 81703 81704