Outrunners supported/held by the shaft? - RC-Monster Forums

zeropointbug · **Outrunners supported/held by the shaft? -** 10.04.2009, 04:27 PM

I am working on a unique project that includes an outrunner motor (not just a direct drive)... my question is this: is the stator and rotor held together by the shaft that is removable? I know you can take the shaft out, but then does the stator and rotor separate at this point?

I know not many people have experience with outrunners, but maybe Sike or Linc can chime in?

sikeston34m · 10.04.2009, 04:42 PM

At the front of the motor on the mounting side, there is usually a locking collar or a snap ring. After removing that, just pull off the endbell.

Be careful. The magnets are very strong and if you slip, it will pinch your finger tips.

I hope this helps.

When you get it apart, check out the winding on that bad boy.

redshift · 10.04.2009, 07:55 PM

Yeah the shaft is moveable to allow you to drive from either the static end or the rotor end. Another tip I learned, when putting the rotor back over the stator, don't allow the field to 'snap' the rotor back on. The impact can take out the front bearing, which really sucks if you just changed it.

zeropointbug · 10.04.2009, 08:06 PM

Okay, so when the shaft has been taken out, can the stator and rotor still spin, and/or is it supported by something else as well? The project I'm doing does not require the shaft, instead will use something else (a shaft of sorts.... shut up Linc

), I will just have to do it a little differently than I was originally, no big deal. I can't believe no one has tried this yet! (it's a little complicated, but still) Sorry, can't tell you what I'm doing!

redshift · 10.04.2009, 08:20 PM

Nope, not the way your thinking I'm afraid. An outrunner is just an inrunner turned inside-out. One piece shaft, full length. Excess shaft can be cut off, but the shaft needs the collar on the stator end, that's the main thrust bearing. The front bearing is only for alignment, it sees no lateral load.

MetalMan · 10.04.2009, 09:15 PM

Between myself and other members like sike and linc (there are still more, just can't remember who) we've had plenty of experience with outrunners. And why is it you can't tell us?

zeropointbug · 10:03 PM

Cuz then I'd have to kill you.

J/K, but it really is that unique, and it very well deserves developing, whether I do or not remains to be seen though... I just need to make prototype first and see if it will work.

10.05.2009, 01:25 PM

Can we guess?

zeropointbug · 10.06.2009, 12:03 AM

Go for it man, I encourage it!

BTW, welcome to the forum!

zeropointbug · 01:09 AM

This is the model I am going purchased to design it around. Quite powerful, but only one of a couple that will work.

http://www.innov8tivedesigns.com/pro...roducts_id=539

MetalMan · 10.06.2009, 01:30 AM

Awh, no HK series? Those things, judging by the numbers, seem like they should be real powerhouses. Too bad the kv is so high...

My guess would be that you are planning on using the motor to replace a diff, and are planning on using some sort of planetary reduction. At least say if I am close?

What's_nitro? · 10.06.2009, 01:36 AM

Time machine............

zeropointbug · 10.06.2009, 02:43 AM

You're close.

10.06.2009, 01:12 PM

Thanks!
My guess would also be on replacement of a diff. Other things that come to mind are mating a ring gear on the shaft, and attaching the motor to the bulkhead. Or replacing the standard shaft with a nitro engine crankshaft turned down, for attaching a clutch.
Keep us updated!

MetalMan · 10.06.2009, 04:18 PM

Here's a simple question I hope you can answer: what voltage will you run?