[Marco Tahtaras]

Originally Posted by 700rpm

There's an excellent article on this in the current "Restorer" by Lynn Sondenaa, including how to make a centering tool.

Ok, you prompted me to finally remove the wrapper from my magazine. There are either some common oversights by the author or I'm missing something.

The author states "I attached a button indicator to the fixture to measure the the circumference in thousandths of an inch". What he is doing is simply measuring variations in the radius but not the actual radius which is critical. For example, if the drums measure 11.040" then the point of reference for centering the shoes must be a radius of 5.520" and the gauge must be set as such.

I see more issues with the setup but suspect the odds are that the result will still be better than most folks achieve.