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Steve Lusardi Steve Lusardi is offline
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Default 6" 4 Jaw chuck Backplate

You really should use a cast iron round. Cast iron is a dead material,
dimentionally stable and easy to machine. Steel is absolutely the wrong
material because it will sing when subjected to vibration and amplify tool
chatter.. This is the reason that all machine tools use cast iron. Don't
reinvent the wheel.
Steve

"Ricardo D. Medina" wrote in message
...
Hi,

I just bought a 6" 4 Jaw independent chuck for my Myford ML7, but I
can't get a backplate around here. What steel would you suggest I use
to make one? I was thinking along the lines of 4140, but if 1045 is
alright, it's easier to get here... Any ideas?

Thanks!

Ricardo Medina