RE: [CAD_CAM_EDM_DRO] Re: Cheap 56,000RPM milling upgrade (not a dremel :)

Since air is for the bearings, I would suspect it would greatly shorten the
usable life, if not outright seize-up the spindle.

Pete

_____________________________________________________
 Pete Brown - Gambrills, MD (Near Annapolis)
 Visit my personal site : http://www.irritatedVowel.com
 (wallpaper, western maryland ry, .net, photography, model rr)

-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of cnc_4_me
Sent: Monday, April 18, 2005 11:25 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Cheap 56,000RPM milling upgrade (not a dremel
:)

> It is a high frequency AC induction motor, but uses air for the

bearings

> (both radial
> and thrust) as well as air cooling of the motor. When you turn on

the

> air, the spindle
> begins to float, and if you flip it with your fingers, it will spin

for

> minutes.

What would happen if you do not turn on the air and then operate the
motor. Will it run in a derated mode.


Wally