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Composite Master Square Construction

We take a look at some of the methods and tools used to machine, grind and assemble this master square. This is used as a master right angle reference on the surface plate to inspect right angles. Typically used in conjunction with a comparator to determine and quantify perpendicularity. The square is self checking in that if the two reference sides are parallel you can find dead true square by checking both sides with the comparator. This particular square is made from plain carbon steel and will be pack or gas carburized and finish ground. The flexures at the bottom allow minute adjustments to bring the square into exact truth.