On Dec 12, 9:09*pm, wrote:
...
Jim Wilkins mentioned pie jaws.
...
Michael Koblic,


I just uploaded a photo of mine:
http://picasaweb.google.com/KB1DAL/T...64293268785794

They are made from scrap as the tool mark shows. The jaws cam in only
0.050" when the dark grey outer ring is turned, so it requires top
jaws fitted to the workpiece. The three hardened and lapped disks are
my drilling jig.

This shows the standard mounting geometry for top jaws:
http://www.lathe-chucks.com/BISON/BI...-SOFT-JAWS.htm

You could mill the mortice and tenon in the back of the jaw blanks.
The radial mortice is about 1/4" deep so I'd look for at least 3/4"
thick stock.

If your initial jaw depth isn't enough to hold the work you just turn
the recess deeper. As long as the bit pushes the work against the
chuck you don't need much. Just don't forget and make a cut towards
the right.

jsw