Wood turners use that and so do metal Spinning on wood lathes.
Called Friction plate or various other Friction Chucks. Sometimes
they are cup shaped. I've spun metal on a wood lathe and turned
a plastic bowl blank - flat disk round - plexi - so I could heat it
in an oven and press it while very hot down on six stout pegs and
hold it there in a clamp as it cools. Makes a fluted bowl.


Old technology concept but is very low profile on metal lathes.

Martin

On 10/19/2017 4:15 PM, Bob La Londe wrote:
"Leon Fisk"Â* wrote in message news
On Wed, 18 Oct 2017 19:52:26 -0700
"Bob La Londe" wrote:

A while back I watched a video by Joe Pieczynski on pressure turning. I
immediately thought, "Now that's something I'll never use."

https://www.youtube.com/watch?v=0DrI5B4hui0

Yesterday I bought some great price carbide blades for my 12" radial arm
saw. They didn't fit. No big deal. I have a lathe or three. I'll just
turn
one of the arbors to fit. The little lathe is still all apart for the
duration. The middle weight is pretty much dedicated to small rod stock
collet operations so I walked over to the 1 ton 1440 and grimaced. I
could
have used a couple parallels behind the stock, and shimmed it on the 3
jaw,
or I could have swapped out for the 4 jaw and dial it in, but what a
pain.

Instead I used a live center to get concentric, and pressure turned it up
against the front of the jaws of the 3 jaw. I wasn't sure if my Chinesium
lathe would be up to the task, but it turned out to be dead easy.

Here it is. https://youtu.be/yMwaUokwDaY

Thanks for that. Like you, not sure if I'll ever use it but nice to
know. I saw in the comments a recommendation for a live center with
a built in spring. That way if the tail stock works loose some it won't
fly away quite so quick

********

That would be handy for tapping too.