Remember to Check Your Diagonals!

You must check the diagonal of your square sizes to ensure that the punches will pass through the bore of your coupling nut without interference. The diagonal of a square can be determined by multiplying the size of the square by 1.414, or refer to our diagonal table.

There may also be occasions when it is necessary to check the diagonal of your hexagon size to ensure that the punch will pass through the bore of your coupling nut without interference. The diagonal of a hexagon can be determined by multiplying the size of the hex by 1.1547, or refer to the hexagon diagonal table below.

You must also check the diagonal of your rectangle punches. The diagonal of a rectangle can be determined by the Pythagorean Theorem: A²+B ²=C². The "A" dimension and "B" dimension are the two sizes of the rectangle and "C" equals the diagonal of the rectangle.

You could also refer to the rectangle diagonal table below.

 
Example:  You need to punch 13/16” square holes.  Suppose your  machine requires that you use F-16 punches and your coupling nut is a CN-16.  You first need to turn to the coupling nut pages in your Cleveland Punch & Die Core Catalog.  On the left side of the page, locate the CN-16 coupling nut.  Run your finger to the right to determine the bore size.  The bore size measures 1.070.

   

Using the diagonal formula: 13/16” x 1.414 = 1.148. This diagonal exceeds the 1.070 bore of the coupling nut which means that the corners of the square will not pass through the nut. In this case, there are two options that we have to proceed with this application. You can file out the corners of your coupling nut to allow the 13/16 square to pass through or we can make you a coupling nut with a special square bore. This can be done for rectangle and hexagons as well.

For more information on shape diagonals, please contact one of our experienced “Green Team” members at (888)451-4342 from 7am-6pm Monday through Friday.