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I have been wanting to build larger robots and r/c cars for some time now, but one issue I have had is trying to find larger motors, in the range of electric wheelchair motor size. I found one set on ebay but I am trying to find a more reliable source for these.

To make my question more clear, I am looking for a reliable source(s) for medium size electric motors around the size and power rating of a typical electric wheelchair motor

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closed as primarily opinion-based by Ian, Andrew Mar 16 '14 at 10:31

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Look at Baldor or Kollmorgen (to mention two options). $\endgroup$ – Guy Sirton Mar 11 '14 at 9:49
  • $\begingroup$ This totally depends on output torque and speed, duty cycle size limits. Transmissions can do a lot... Look at your requirements, than select a motor. Not select a motor and build your robot. $\endgroup$ – 2pietjuh2 Mar 13 '14 at 15:18
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From what I found doing a quick search on eBay for electric wheel chair motors, they output 100-150 watts nominal. This isn't that much power and can easily be found.

If you are looking for precision miniature drive high quality motors (that come with a certain price tag):

  1. Maxon Motors
  2. Faulhaber

If space isn't at a premium in your designs, you can expand your search to lower quality, bigger motors that are much less expensive. A quick eBay search got me the two follwing manufacturers:

  1. Dunkermotoren
  2. Groschopp

If you are looking for a distributor, I know of RobotShop.

You can probably find others with the help of eBay or Google.

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For small quantities and ad-hoc projects just above the eBay level: www.surpluscenter.com

For repeatable prototypes: www.robotmarketplace.com then track back by searching on manufacturer for larger quantities.

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