In mounting it must be very clean.

While mine Sheldon is different - the chuck was threaded on by Dad after
a move. When I got it a year later - the chuck was still there and never
checked out. As it turned out, a very small fleck of steel was in the
threads and slightly offset the chuck.

Make sure dirt or chips are not running it off axis.

Martin

Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
"Our Republic and the Press will Rise or Fall Together": Joseph Pulitzer
TSRA: Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Originator & Charter Founder
IHMSA and NRA Metallic Silhouette maker & member. http://lufkinced.com/

On 9/15/2010 1:32 AM, George wrote:
Hello again,

I have a 60 year old Herbert preoptive Lathe. It is quite huge and I
have a chuck with a very bad case of worn out scroll. My question is:
is it possible to replace the scroll and the jaw carriers, or what
ever they are called. or would it be easier to get a whole chuck, -
there is no runout on the body of the chuck? I get runout that varies
over about 20 thou, depending on which bit of the scroll is in use.
What about the chances of finding a 4 jaw that would fit on the 3 stud
fixing. Does anyone have anything that is better than what I have
that is no longer in use? Anything considered. I am near Norwich.

Also I am trying to make a cone on the bottom of a 40 gallon drum. I
have been thinking that it might be possible to pound out the bottom
in the style of a calypso musical drum, to get the same effect. Has
anyone done it, or know how much of a dome I could beat out, - using a
rounded end wooden post for example, before it started to do damage to
the bottom ring edge or started to split the bottom. Or maybe I could
reinforce the top rim and jack down on the bottom from a strong
support at the top, to achieve the same effect.

Any comments would be welcome, thanks and regards, George.