RE: [CAD_CAM_EDM_DRO] cnc lathe project

Makes perfect sense to me, jeff. A 6-jaw chuck will deform thin tubing less than a 3-jaw will. It will also deform "thicker" plastic tubes less than a 3-jaw will.

It may not be the best solution, but it seem slike it could be useful.


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-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Jeffrey T. Birt
Sent: Monday, May 16, 2011 6:15 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: RE: [CAD_CAM_EDM_DRO] cnc lathe project

Why do you think you need a six jaw chuck for plastic? A six jaw chuck makes
it easier to hold thin wall stock as it distributes the clamping pressure
over a larger area. I have a six jaw chuck on an older Clasuing lathe; I
also have a three and four jaw chuck for it. The three jaw chuck is probably
the most useful overall, the four jaw is great for square stock or if you
need to try to get the run-out minimized, and the six jaw is very useful for
thin wall tubing.



Jeff Birt

Soigeneris.com



From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Denis
Sent: Monday, May 16, 2011 12:09 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] cnc lathe project





Hello all,
I want to build a small cnc lathe with a 6 jaw chuck so I can work plastics.
From what I've seen lathe chucks have 4 joint types, cam lock, threaded nut
and taper, screw on chuck ( like south bend ) and some imported chucks that
bolt on the back.
The spindle looks like it would be the hardest part to come by, because the
chuck interface joint looks difficult to manufacture.
I like the cam lock type - is it easy to make? Is it a good choice?
Are there adapters to go from one joint type to another or are you stuck
with what you select for a joint type?
What's the best approach to getting a spindle for the lathe; should I
attempt to make a spindle, or would it make more sense to buy one if I could
find a source for it?
thanks
Denis





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