"This chart does not check out with others "
Dear Jesse & Fellow Orchidistas, My Conversion Chart used the
Birmingham Gage aka Stub's Iron Wire Gage.
I based my chart on Small Parts Company's catalogue from whom I buy
my drill tube which I use to make ultrasonic drill bits for drilling
I copied their small diameter stainless tubing chart -gauge to
inch conversion- as the initial basis for my chart. I then added
the metric portion based on a 25.4 mm to the inch conversion.
From what I understand in your post there are more than one type of
I used to measure and label all my ultrasonically drilled hole
diameters using inches. (i.e..e. 0.018", 0.020", 0.025" etc.) but
many jewelers complained and wanted a gauge measurement. Now It
seems I have been basing my conversions on the wrong gauge system.
What is the gauge system American jewelers use? What about the rest
of the world, do you use gauge, metric, or... ?
I will make a new chart adding that gauge system. Please post a few
comparative conversions (gauge to inch) from your info so I/we can
see what the difference is.
Live and Learn.
Thanks, Steve Green - Rough and Ready Gems - Briolettes and
Ultrasonic Drilling www.briolettes.com