What speeds to use with insert tooling?

Wreck™Wreck said:
If you can not turn the spindle fast enough or use a deep enough DOC then most insert tooling is not for you, not all however.
Use the most positive rake sharpest uncoated inserts that you can find, run it as fast as possible with a minimum .008-.010 DOC for finishing, also use flood coolant if possible.
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About a year ago, I ran an experiment with a CCGT 32.52 AK insert on 6061 aluminum; the AK insert has an aggressive positive rake. Speed was 2200 rpm, the fastest my 11" lathe will run. Depth of cut was 0.010" and I used a lot of WD-40. It cut a near mirror finish. Lighter finishing cuts did not finish as well. Heavy roughing cuts (0.20") taken at the same speed went fine.

WreckWreck is right.
 
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