High speed motor 1

[alansimpson]

I am having difficulty sourcing a high speed electric motor.
30,000 to 40,000 rpm, +1kW
Wish to do tests on spinning object.
Know of any suppliers out there?
Any help welcome.
thanks

 

[tygerdawg]

You would be looking for the type of motor used on a spindle. "Columbo" is one brand that comes to mind, but there are others. Most seem to be sourced from Switzerland or Italy. Motors of that speed are typically 2-pole motors driven through a Variable Frequency Drive.

TygerDawg

 

[cbrn]

Hi,
as suggested before, maybe you will be able to find a spindle motor which runs at these speeds, though I think it will be very difficult because machining something at 40000 rpm is typical only of those milling machines for "micro-finishing" (use Ø0.4 mm tool or so), and due to the precision of this kind of machinery, the manufacturers are very jealous of their techniques, so they produce for themselves and nobody else.
IMO, you could investigate the use of a lower speed motor (10000 - 15000 rpm) coupled to a multiplier (provided that you have enough torque though...)

Regards

 

[MintJulep]

30,000 rpm and 1 kW is typical of many woodworking routers.

 

[bklauba]

Think brushless DC.

BK

 

[GregLocock]

Think angle grinder

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[MikeHalloran]

Common angle grinders' output shafts don't go that fast. I don't think their motor shafts go that fast, either.

Above ~25,000 rpm, you're typically looking at very fancy and expensive motors with specialized controls, or more ordinary motors with flat belt speed increasers.



Mike Halloran
Pembroke Pines, FL, USA

 

[unclesyd]

Having no inkling of what your are trying to do I would recommend that you study the Ultracentrifuge. This is the only piece of readily available equipment that can achieve the speed you desire. Other lower speed machines can achieve tremendous x g levles.

You are contemplating working in a speed range where safety is of paramount importance. I've witnessed a rotor comming apart at 50,000 rpm and it wasn't pretty.

http://www.beckmancoulter.com/produ...cience_Research/pr_disc_gen_ulcent.asp?bhcp=1

 

[unclesyd]

You will have to ignore my previous post as I experienced a rare senior moment. I wrote down 70,000 instead of you requirement of 30,000-40,000 rpm.

Here is the company that supplied some high speed motors for us. They also carry the router motors mentioned by MintJulip

http://www.ekstromcarlson.com/highspeedcustommotor.htm

 

[unclesyd]

Talk to the right people, at the doctor's office, and you can get some information. The term to search for is "high frequency spindles".

Here is one manufacturer whose name came up in the conversation.

http://www.alfredjaeger.de/index.html

http://www.alfredjaeger.de/englpdf/kataloggbinternet.pdf

Here is the US representative for Jaeger and others.

http://centerline-inc.com/

 

[Cheddarcaveman]

As has been said, you need to be looking in DIY shops for a hand-held woodworking router. They typically run up around 30-40K rpm and would be in the right power range for you.
You would possibly have to modify the shaft to take your particular drive system, and at these speeds, that needs to be well balanced, even on such a small diameter.

 

[electricpete]

why are the motors rated in units of "g"?

=====================================
Eng-tips forums: The best place on the web for engineering discussions.

 

[unclesyd]

In relation to spindles is the amount of unbalance permitted at speed.

http://www.sme.org/cgi-bin/find-articles.pl?&05dem004&ME&20051208&PUBME-66.249.65.80&SME&

 

[Javier72]

You can try with Maxon or with a manufacturer of Universal motors. These last kind of motors have a very high speed with a very high torque, but their working time is very short. Maybe Sintech, in France, can give you an answer.

Maxon manufactures very high speed and very high quality motors, but the price is elevated too.

 

[Tmoose]

Do all I had to do is spin parts?

I'd look toward building a support spindle with desired nose or face configuration and belt drive it 2 or 3 to 1 via a lower speed motor using a poly V tybe belt.

This is a "spin test" device wheterh intentionally or indvertently. Proper containment via a stout lead lined drum or buried vessels would be prudent