Doug Winterburn wrote:
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.

Now that's clever--bending the hanger.