On Feb 9, 8:29*pm, mac davis wrote:
On Sat, 09 Feb 2008 16:32:06 GMT, Owen Lowe wrote:
Having a form cover the chuck key area is a real pain when it happens.

I don't understand this one... If the form covers the key area, how would it get
into the chuck at all?
Maybe I'm missing something here, but I've never put anything in the chuck and
not been able to reach the key hole...

If I had, I don't think I'd turn it as is, I'd add a glue block or something..
I have to be reading or visualizing the problem incorrectly..

mac

Please remove splinters before emailing

If you have a hollow form like a bowl that you want to hold with the
jaws from the inside, for whatever reason, it could cover your chuck,
however, if there's only a inch or two between the chuck and wood, you
couldn't get you ball-end hex-key in there either, so there's and
advantage only in limited cases.

In the case Owen is referring to, to turn a recess or spigot on the
inside so you could shift your axes over, one could do that, but it
would not be as easy as using a drive-spur in your chuck as I see it
anyway.

There are always cases where you have to work around limitations in
order to do certain things.

To come back to the jaws and chucks, where numbers of jaws available
to cover the gripping size from small to large, is seen as an
advantage,
I see them as a limitation, or the result of a limitation, as it is a
result of limited jaw travel being available on a chuck, and they are
always there, or else you would need only one set of jaws, .....but
having a chuck that has a longer travel, is a distinct advantage, as
one set of jaws is able to do more.
This also means less often changing jaws and less money invested in
more different size jaws and/or extra chucks.

The case of protruding jaws is in and by itself maybe seen as a
hazard, well granted they are hard, but so is the wood thats held in
the jaws, I don't think you'd be able to tell the difference if it was
a sharp corner of the wood that hit your knuckles or the chuck jaws,
but covering the jaws if protruding, with a soft and colored band
could help in that regard, a little hard to do to the wood you are
turning, :-)) so DO be aware of what you are doing, or you could get
seriously hurt if you don't !!!
Have fun and take care
Leo Van Der Loo