Converting from RPM to Surface Speed In CNC Milling and Turning

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The Speed in both milling and turning operations comes from the rotation of the spindle. Rotation is typically reported as RPM or Revolutions per Minute but the speed that really matters in cutting operations is the relative velocity between the cutting edge of the tool, and the workpiece. In Milling It depends on the diameter of the cutting tool, and turning the diameter of the workpiece where it is interacting with the tool tip.

[@blackcarbon369]

you forgot to tell how you got 12
12 is constant
pie x12 which is 12 inches in a foot
constant is 3.82

[@AllForTheGame]

the thing that was confusing about SFM is that i thought it was an equation that considers all the variables such as feed per tooth, RPM, IPM. But its not. Its an advanced variable of RPM considering tool diameter.

[@asty2323]

hi good job,
thanks alot, do you have metric version (mm) ?

[@user-zg5vd2gl6n]

hello, I can ask you to do all this in the same way, but only for a “lathe” machine and in the metric system!!!??????

[@lokeshd5753]

Same for drilling????