On 2009-10-11, wrote:
On Oct 10, 7:52*pm, Wes wrote:
" wrote:
Is this a common style, or poor design, and is there anywhere to still
get a jaw like this. Is it possible this was an old Logan chuck?
Thanks, Tony

Tony, *if you look at above links, they are abbreviated, please repost links.

Wes

Thanks Guys, Lets see if these work any better
Thanks, Tony

http://i217.photobucket.com/albums/c...t/BkJaw009.jpg
http://i217.photobucket.com/albums/c...t/BkJaw008.jpg
http://i217.photobucket.com/albums/c...t/BkJaw003.jpg
http://i217.photobucket.com/albums/c...t/BkJaw005.jpg

O.K. I've seen this design used before, usually on fairly small
4-jaw chucks. It has the advantage of being the easiest style of jaw to
make in the home shop, so you should be able to make your own
replacement jaws.

However -- it looks as though this was either cast iron
(machined to size and shape) or hardened and not tempered steel, so it
broke under stress. If you make the jaw of a hardenable steel, leave a
little extra slop in the groves because it will grow slightly from the
hardening process. Then, using a torch with most of the jaw submerged,
draw the temper of the overhangs which the screw bears upon.

Good Luck,
DoN.

--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---