That 4-jaw setup was actually quite impressive. Extra points for feeding the
boring bar and cutting metal while holding the video camera to make the
video.

That 4-jaw chuck looks like the one that's supplied with the 9x20 lathes.
The wobble doesn't exist on the lathe spindle because the spindle includes a
raised shoulder feature to register the chuck at a nearly perfectly square
position.

I read quite a few remarks from disappointed new 9x20 lathe owners, wrt the
4-jaw chuck. I found the chuck to be suitable for a lathe of that size and
power.
It's not like a 9x20 is intended to turn a 50 pound workpiece at 1000 RPM.

--
WB
..........


"Michael Koblic" wrote in message
...

I was thinking that if I return to red neck technology I would probably
make the ring spin horizontally this time. But anything will be
considered. The important thing is to spin the work piece quite slowly
otherwise the grinder works quite inefficiently, at least on the face. The
RedNeck lathe v5.01 went at less than 100 rpm and could have gone slower.
I found that an X-Y *vise* was capable of holding lathe tools quite firmly
and take large cuts. Here it is with a boring bar holder I made:

http://www.flickr.com/photos/2768312...7614869315843/

I have to add that the wobble was all in the chuck: The spindle had a
runout of only about a 0.001" :-)

--
Michael Koblic,
Campbell River, BC