dpb wrote:
Phisherman wrote:
...
For testing drill press runout you can, with the power cord unplugged,
use a coat hanger chucked in the drill press such that it lightly
touches the drill press table top. When it is even all the way
around, the spindle is perpendicular to the table top. No special
tools needed!

??? I've never seen a precision-enough coat hanger that any part of it
would be straight/level enough in reference to any other that it would
be of any use as a measuring tool...

How does this work, exactly, again?????

--
The hanger is crooked enough that it touches the table at least several
inches from the center point or the point that straight rod in the
chuck would be. As you rotate the chuck by hand, the tip of he hanger
should just touch the table (in a circle) if the table is level. It's
kind of like the process of leveling a RAS table by removing the blade
and setting the bevel with the arbor straight own, then checking that
the arbor just touches the table as he arm is swung and the motor pulled
along the arm.