On Jan 4, 4:13*pm, "Existential Angst" wrote:
"d32" wrote in message
...
Anyone else had trouble with the $150 three jaw chuck?
About 4 years ago I bought a used 13 X 40 Jet lathe. *Sweet machine compared
to the Smithy 3in 1 I had. * It came two three jaw chucks and each of them
had 20 mill run out. * I bought a new cheap 3 jaw and was thrilled to see it
had about 2 mill run out until the 2" diam Al rod jammed when I was parting
it out. Now I have 3 cheap 3 jaw chucks with 20 mill run out.
The new chuck (Christmas present) *is arriving in a day or two and it is
supposed to be a step up from the cheap ones. *I am also going to be way
more carful doing cut off operations.
Anyone have some rule of thumb for cut off operations?
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I bleeve you can grind the jaws pretty simply for zero runout. Dumont-type
grinder (or improvisation) in tailstock.
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EA
http://www.youtube.com/watch?v=IAtASZxDaf4