Does a ring hole have to be round?
Well, Jonathan, you come to my restaurant, you order a $50 steak, you
want it medium rare, so I cook it well done and just serve it
up...... On the other hand, does anything HAVE to be anything? I have
always thought that if it's a circle or a square, it should BE a
circle or square - if you want it oblique, make it oblique, not just
a crooked circle. I make "perfect" circles when I can on the lathe,
but I have a lathe. Otherwise, it's pretty simple, really. I lay out
lines on a wax all over, but for the ring size I just get dividers
and mark a circle of the size or a little bigger on both sides.
Standard ring tube = 15mm hole, need 17mm, so mark a 1mm line around
it. Then I cut up to or nearly to that line, all around, and I use a
file to do it, and do it on both sides - then you know it's equal and
straight. Finally, make it 1/2 size small, then you can pound it up
round and to size in metal..