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What is meaning of the red-zone on Bridgeport varispeed?

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  • What is meaning of the red-zone on Bridgeport varispeed?

    What does the red area represent from 3200-4200 rpm on varispeed mill heads?

    I feel stupid asking this since I've been a Tool & Die Maker for 15 years. It's just never come up. If I stab a guess I would say it means to not use the quill feed at those RPMs. Don't like guessing though.
    Super Dave
    RapidtoCNC.com

  • #2
    I thought it meant, don't run in this speed range for extended periods. But, that's just a guess I don't really know.

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    • #3
      I would agree with that, On our Enco Vari Speed Mill @ school its really a reminder that you should stop cranking unless you want to break something, or if your in the opposite direction-----switch to backgears.
      -rob comer

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      • #4
        Originally posted by suprdvn
        If I stab a guess I would say it means to not use the quill feed at those RPMs.
        You would be correct
        The early bird may get the worm but the second mouse gets the cheese.

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        • #5
          Red Zone

          It will explode if run in the red zone Burp...

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          • #6
            I seem to recall reading something about using power quil feed was a no-no at that rpm that and if you leave it there I think it kinda loads up the motor for starting

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