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View Full Version : What is meaning of the red-zone on Bridgeport varispeed?



suprdvn
04-03-2007, 12:27 PM
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.

DR
04-03-2007, 01:10 PM
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.

comerrm
04-03-2007, 01:28 PM
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

Marc M
04-03-2007, 01:40 PM
If I stab a guess I would say it means to not use the quill feed at those RPMs.
You would be correct:)

madman
04-03-2007, 06:07 PM
It will explode if run in the red zone Burp...

chrsbrbnk
04-03-2007, 06:38 PM
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