Reply To: Square not so square
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14 August 2015 at 3:29 pm
#129368
@salko
Salko, there is a trick I learned to true up combo squares. The ruler rests on two slightly raised bumps in the slot into which it rests. You can file down the one that is a little high with either a small file, a stick wrapped with sandpaper or the corner of your ruler. Be careful and don’t remove too much as a half a degree can change in a flash. File a single stroke, then test it. If not good enough, file again and test it again.
Just be careful that you file the proper one. Good luck.
p.s., I would rather do this than file the ruler and get it out of parallel with itself.