[HBR] dial markings

[Helmut Usbeck]

The way I have made up graduated metal dials is with a lathe.
In a nutshell what one does is chuck up the stock and cut the dial to
size.  Then bore a 1/4 inch hole dead center.  I then re-chuck it into the
spindle bore of the lathe.  Using the tool holder with a screw cutting
tool held perpendicular to the piece I lower in into place at a depth of
about .01 inch.  I then move the tool holder out towards the perimeter of
the dial and there you have a beautifully cut "etching".  One then
continues around the dial until its finished.  Of course one also need to
calibrate the spindle in degrees and some sort of clamp has to be devised
to lock the dial in place as the tool is drawn thru.  Or if you got the
bucks or knowhow to made a degree wheel that is the easiest and most
accurate.  Small number dies are used for markings.  I then fill the
marking in with of all things, crayons.  Rub into the etching and then
wipe off excess.  I've used all sorts of paints and application techniques
but so far this is the nicest I've seen.  Try it on an old knob some
time.
There is a bit more to than that but that's the basics.  It's actually
quite easy.  Most machine work is unless one's a real duffer.  It can be
quit fun.  Why with a good engine lathe and some welding equipment you
could build just about anything.

Regards,
Helm.  WB2ADT