On Fri, 8/23/13, Greg Bentzinger <[email protected]> wrote: Subject: Re: [Emc-users] BP Knee Mill Spindle To: [email protected] Date: Friday, August 23, 2013, 7:30 PM John; BP was pushing the edge with the 4200 rpm top speed. When you look up bearing specs most consider 4000 rpm max continuous under load. If your head is truely that noisy then something else isn't right - cutting air that machine should just purr with the loudest noise being the motors fan.
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