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searching small motor 120 VAC/VDC, 7.5 Amp 3

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flapman

Industrial
May 3, 2002
12
I am looking for that electric motor for a power tool design, so must be as small as possible (around 30 mm diam.). I need manufacturer's and detailed characteristics of the motor.
 
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Yes, in fact, that's a problem. It is relative easy to find a list of manufacturers for the specs I gave, but none of the motors they make are "small", for your info, the universal motor should have around 10000-36000 rpm. I have been looking in a lot of searchers with no success.
 
Hi , I doubt if you will find a standard motor anywhere near that spec. You might have more luck with an air motor.
 
We make motors which might suit your needs. A slotless brushless model comes to mind...similar to one already used by a major industrial tool manufacturer.

We also make others which may fall into that size category.

E-mail me if you want.


Jon
 
Thanks a lot, jbartos, I already knew Groschopp but not the other two references. I have already e-mailed them as they don't have online catalogue.

Jon, your info can be as well very interesting for me. This motor is for a power tool project. The problem is that I don't know how to e-mail you directly.:(

I need drawing of the motor and speed-torque-efficiency curves.
 
Universal motors are really difficult to find because all manufacturers divide their catalogues according AC or DC motors. So, where should I look for universal motors in the catalogues?. I would appreciate as well if someone can give me some sources to get more info about universal motors.
 
Merkle-Korff has a case about that size for a dc type. Don't know how strong of a motor they can put into it. Maybe they'll build you a prototype.
 
Thanks for the Merkle-Korff reference, their web page looks really good. However, the motors they manufacture seem to have much less power and speed than required, the other thing is that I need the motor to be universal. Notice the motor power must be 1,2 hp (900W) and speed 10,000-35.000 rpm. Dimensions are not that important, I just want it as small as possible (it is for a hand power tool, similar to a grinder), so OD can be 100mm or even higher.
 
I think you can find universal motors from all power tool manufacturers!Or are you planning something different.We are planning a Brushless version for a similar application with a controller outside.Are you interested.We expect to roll out production during first week of July.The OD is expected to be 60mm.
 
Probably it is true your first statement, I can find universal motors from power tool manufacturers, but...where to obtain detailed specs in the web? (I mean drawing and speed/torque/power/current characteristics).
 
I have done some more investigation about the issue with power tool makers. You can always order spare rotors and stators separatelly without the bearings and so on, so I assume this is the reason because they don't use to give the specs. I need to know then 1.How to assembly properly both parts (with acceptable excentricity!). 2. How to know the curve characteristics before trying.
 
Yes, that's it. Gselectric has interesting info about universal motors. I still don't know if they will have exactly my requirements, but at least I can read something about universal motors. Thanks jbartos. If you have some other similar web reference (your "etc") it will be of help for me.
 
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