Setting cutting seats

Jewelry Discussion
1

Question regarding setting cutting seats:

I have been having a problem while cutting seats. The bur keeps
traveling around the prong. I have tried to adjust the speed that I
start with by going faster and slower to start but neither seems to
make a difference. What am I doing wrong? I am cutting seats for
oval cabs at the moment.

Thanks in advance!
AC

2

hi folks! If you look in the April issue of the AJM all of you here
will see my little invention on setting Cabochon stones in bezels.
Its so easy to make why hasn’t anyone else made this??/dunno. Its
made with a very large round bur about 033 - 045+ size and go to your
bench grinder and remove the top half of that large. You can now cut
down to the most widest point of that bur, and voila, Cab-Cutting
bur!!! (its copyrighted !) Even Martha Stewart hasn’t though of
this…::>) she’s busy right now…LOL ! Invert this new bur and cut
away to your ‘hearts delight’. The flat cut side of the bur is NOW
RESTING on the bezel’s lower edge for the stone to sit on!!! Also now
with this bur, you have made an angle for the Cab to rest
’against’… inside… the wall. I have about 12 different sizes to
accommodate different sizes of Cab’s…Gerry!

3

Dear Gerry, Your usual lucid explanations offered to help us
understand setting stones does not apply, at least for me, in this
case. The alteration of the bur is clear enough! You can now cut down
to the most widest point of that bur, and voila, Cab-Cutting bur!!!
(its copyrighted !) Here is where you lose me. Have you photos or
drawings of this? ! Invert this new bur and cut away to your ‘hearts
delight’. The flat cut side of the bur is NOW RESTING on the bezel’s
lower edge for the stone to sit on!!! Also now with this bur, you
have made an angle for the Cab to rest
’against’… inside… the wall.

4 
... Cab-Cutting bur!!!! (its copyrighted !) Here is where you lose
me. Have you photos or drawings of this? ! Invert this new bur and
cut away to your 'hearts delight'.

I think our Gerry means that a round bur ground with a large
flatspot at the end will now cut a seat for a cab, as it’s shaped
like a cab… “The flat cut side of the bur is NOW RESTING on the
bezel’s lower edge for the stone to sit on!!!” I believe this lower
edge is what we grind in the inside wall of the bezel. That is, it
doesn’t exist till we make it, with this helpful tool.

How are you Gerry!!!

Brian
B r i a n A d a m
e y e g l a s s e s j e w e l l e r y
www.adam.co.nz