Originally Posted by
bridger berdel
I'll buy that $165 square- for $5 at an estate sale.....
actually, I have a drawer full of squares, and parts thereof. One Of These Days I'm gonna work out an accurate and efficient way of truing up combo square heads.
It is actually very simple. One either side of the threaded apparatus that holds the blade in place are raised metal bosses (lands or other names may apply). If the angle of the beam (ruler?) to the head is greater than 90º, the one between the holding device and the work needs to have a little filed off. If the angle is less than 90º then the boss on the far side of the holding device needs to have a touch of metal removed. Use a file like an auger file with safe sides.
Also go slow and check after each stroke. You will be surprised how fast things change.
Hope this helps,
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)