Milling a 4-jaw chuck??
Okay machinist, I need some help. I bought a 4-jaw chuck for my lathe since I need to turn round ends on some .125" square shaft. The chuck will only close to .250". Could the angled sides of the jaws be milled down to make the jaws move further in or are they hardened? I ran a file across the edge and it cut but I'm not sure if they are hardened.
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