rake60 said:If you know the SFM you want, it can be calculated with a very simple formula.
SMF / Dia X 3.82 = RPM
To achieve 200SFM on a 3" Dia work piece:
200 / 3 X 3.82 = 382 RPM
rake60 said:Sorry I did it a worng button on the caculator when I made
the original post. The correct answer to the example would
be 254.66666 not 382
Rick
Rog02 said:Sheesh, and I thought you were going metric on us Rick. :big:
IanN said:I agree with Mcgyver - the information you read about cutting speeds, tool angles etc is based around production requirements (removing the maximum amout of material in the shortest time and at the minimum cost) and factors in things like machine down time for tool setting and the cost of sharpening and regrinding tooling (or the cost of replacment tips if cheaper).
Ian.
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