I'd like to see a bur set, 45 or 90, cut with a profile designed
for "fat girdle" stones. They would look like regular setting burs,
except instead of a sharp edge, the edge would be squared slightly,
to cut a notch in a prong that would provide clearance for stones
with thicker girdles.
I was cleaning up old emails and found this entry and an answer
Burrs for " fat girdle " stones could be made from regular setting
burrs by grinding or sanding the sharp edge away .
This will leave the edge squared slightly, but with the same 45 ,
70, or 90 degree outside profile. The upper and lower cutting edges
would remain sharp and at the same angle.
The amount ground off the outside edge would determine the
girdle thickness which would be left in the prong or side wall .
And perhaps by grinding a " safe edge " on the upper or lower
cutting edge of these burrs, you could also quickly manipulate which
part ( upper or lower ) of the seat which could be cut away.
In the past I have used # 8 cut escapement files and or gravers to
correct these problem. Slow - very slow .
This is another use for all the old bits which we all keep in hopes
of finding a use for.
I have several medium grit 1" x 3" diamond honing sticks. These are
used to clean up and deburr hard cutting tools. Cheep and works
I am getting ready to begin moving soon, and I will not be able to
check this out . If it works out, some one please let me know as
cutting stone seats in prongs and walls is not easy .
ROBB - Still waiting for the other shoe to fall.