Wouldn't it be nice to have a ring mandrel shaped file for sizing
rings? I wouldn't care if it had the size markings or not. Does
such a thing exist?
Jill, Matt Tools makes two ring sizing tools. One is a mandrel with
a mounted blade running the length of the taper. You size your wax
with a backwards rotating scraping action (don't turn the blade into
the wax with forward rotation as you're more likely to bite and gouge
your wax) taking care to flip the wax ring over to compensate for the
taper. Also, even though the cutting mandrel has sizes marked on it,
you should measure your size on your usual mandrel to insure your
The second tool is a ring sizer that cores out wax ring tubes to
size. You then saw off the sized portion of the ring tube. This
tool is nice because you get a straight, untapered ring hole.
To see and images of these tools, visit www.dumatt.com