Well, the old Perske motors are 7hp and air cooled, and their fan is rather pathetic, I suspect they get more cooling from conducting heat through the machine mounts, than from the forced air from the fan, plus they are mounted in the dust collection airstream.
We also have some much larger spindles with no active cooling what so ever, no fans, no forced air, no water, the 14kw ones get nice and toasty. ----- Original Message ----- From: "Jon Elson" <[email protected]> To: "Enhanced Machine Controller (EMC)" <[email protected]> Sent: Monday, October 19, 2015 1:16:34 PM Subject: Re: [Emc-users] Cheap Chinese Spindles? On 19 October 2015 at 16:15, Todd Zuercher <[email protected]> wrote: >> Anyone have any opinion on a spindle like this? >> http://www.ebay.com/itm/7-5KW-18000rpm-380V-15-5A-Square-Spindle-Motor-ER32-Air-cooled-CNC-Woodworking-/201181719622?_trksid=p2141725.m3641.l6368 >> for 1/3 the price of the Perske it is hard not to consider switching. It is air cooled, and 380 V. I don't know how much cooling air a 7 Hp motor takes, but it has to be a LOT! I know my Westwind spindle takes a 2 Hp compressor, and while it uses air bearings, all the air is really for cooling. That is about a 1/2 Hp spindle. Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
