4.2 HIGH SPEED MACHINING

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Usually spindle speeds above 10000 RPM, but this is highly relative to the cutting tool and work.

The cutting velocity is higher, but the feed/depth of the cut is reduced, the resulting mrr is still higher.

Higher spindle speeds call for new low inertia spindle, and tolerances as well. Small tolerance problems can result in unacceptable vibrations at these speeds.

The table below is an example of some cutting speeds [Ashley, 1995]