Jacobs quick change chuck  
I finally finished this project for my craftsman 6" lathe. I started it in
7/2003 and finished it in 10/2009. I turned down the back plate from
8.000 to 4.000, let me tell you this stuff was super hard, Fire was
shooting from the chips fling off.  I threaded a steel backplate for the
spindle thread of 1"-10 threads. I made a shoulder to press the two
parts together and welded them.  I can now chuck up small round
and square stock from 1/16 to 1.2500  with this.
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