Go with a 3/8 or 1/2" verimill.
I'm running one now at 35ipm in 303 .125 deep cuts per pass, dry, roughing and finishing with the same tool. This same tool has been running (dry) for over 47 hours straight, and so far it has barely worn down a little bit of the coating. Still sharp on all edges/corners. Did I mention it's running dry?
BTW, I'm taking it easy on the cutter, I have 4 6" vises holding single bars that get seperated into 4 parts per vise, so I don't want to toss any of the parts as they get seperated.
Not bad for a $25.00 tool, eh?
'Rekd
Matt
San Diego, Ca
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)