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  • Feeds and Speeds

    Received some new inserts for a job that starts tomorrow.
    48 parts from heat treated (34-38 RC 4140) stock 7/16" Diameter.



    The recommended cutting speed for the .235" diameter is 390 SFM or 6300 RPMs for roughing.
    200-560 SFM for finishing or 3250-9100 RPMs.

    What say the collective minds here?

  • #2
    Sounds about right.

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