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Old 04-07-2008, 02:39 PM   #496
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Are all rotors on the Orion motors sintered? I just bought a 7.5 off a guy and it looks like it is sintered, but with a black coating over it.

Thanks
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Old 04-07-2008, 04:07 PM   #497
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Drifting only yesterday, all of a sudden i here this sound that the gearing makes when its not meshing properly, have a look at it, & the front bearing has been completely stuffed. Now i have this little problem



the outer bearing cage is still inside the bearing mount. Anybody have any suggestions on how the hell to get this out??
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Old 04-07-2008, 05:15 PM   #498
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heat it up and it should come out easier. and cut your nails, lol
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Old 04-07-2008, 06:59 PM   #499
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cheers for that mate, & yeah i do need to cut my nails!!
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Old 04-07-2008, 10:13 PM   #500
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Well no luck, ive actually ended up damaging the front bearing housing by trying to get the bearing case out. I emailed orion to ask if i can get the front bearing housing just on its own.

With the new range of Vortex 08 motors, does anybody have any info on when the majority of them will be released? If i cannot get a new front bearing housing, ill just grab a brushed motor for the time being & wait for the new Vortex 08 range to come out...
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Old 04-08-2008, 03:01 AM   #501
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This is very easy to do.

Heat an oven to 150 C(fan assisted) once warm pop the part in there for 6 mins.

Grab an oven glove take out and with a hard tap the broken bearing will fall out. Slight chance a gentle poke with flat edge might be necessary.

To place a new bearing in .. heat as above the new bearing will just fall into place very easy.
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Old 04-08-2008, 11:12 PM   #502
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i cannot get a small enough flat edge in between the bearing stop at the front & the bearing without the flat edge bending. I heated mine in an oven on 200C for about 20 mins, i tried everyway to get the bearing case out, but it wouldnt budge. I even managed to put some nice big dents/scratches in the front bearing housing with my pliers trying to get this thing out...
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Old 04-09-2008, 02:57 AM   #503
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You probably left it in too long. If I read the suggestions right what they do is heat the housing but stop heating before the bearing itself gets hot. This way the housing expands and the bearing does not helping it come out. If you heat too much and too long both expand and you are back where you started: stuck.
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Old 04-09-2008, 06:30 AM   #504
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no in any case the housing will expand more than the bearing. Besides the bearing ought to heat up quicker than the housing. Probably the tolerance isn;t quite right and heating isn't enough, I have found the bearings to be in really tight...

The solution would be to machine it out...
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Old 04-09-2008, 06:49 AM   #505
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Take a dremel tool and cut thru the bearing piece. You might have to cut two locations. I have to do that from time to time on my mountain bike.
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Old 04-09-2008, 02:02 PM   #506
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Quote:
Originally Posted by TRF415boy View Post
no in any case the housing will expand more than the bearing. Besides the bearing ought to heat up quicker than the housing. Probably the tolerance isn;t quite right and heating isn't enough, I have found the bearings to be in really tight...

The solution would be to machine it out...
In what world does steel absorb heat faster than aluminum size is irrelevant since they are both touching.

The housing will always heat up faster...
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Old 04-09-2008, 02:12 PM   #507
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Quote:
Originally Posted by HVAC25000 View Post
In what world does steel absorb heat faster than aluminum size is irrelevant since they are both touching.

The housing will always heat up faster...
1: they are both made out of steel

2: I agree with the fact they're both touching, i was merely stating the fact that if one was to heat up quicker it'll be the bearing housing.
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Old 04-09-2008, 03:00 PM   #508
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Wow.

If the endbell is steel, then why is it actually made of anodized aluminum, like EVERY other 540 brushless motor in the world? And even more importantly, why don't magnets stick to it?

Good lord man, congrats on the dumbest statement of the year. *Big thumbs up*
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Old 04-09-2008, 03:20 PM   #509
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Quote:
Originally Posted by HVAC25000 View Post
Wow.

If the endbell is steel, then why is it actually made of anodized aluminum, like EVERY other 540 brushless motor in the world? And even more importantly, why don't magnets stick to it?

Good lord man, congrats on the dumbest statement of the year. *Big thumbs up*
FYI not every steel is magnetic... And Aluminium isn't the only metal that can be blacked so telling by its colour isn't going to be very accurate.

But agree after closer inspection the can is made of aluminium. I'd never considered it could be made out of anything else than steel, like on every brushed motor...

It doesn't make any difference to the bearing issue, the can would expand more than the bearing's outer ring, even more so with the can being aluminium.
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Old 04-09-2008, 03:36 PM   #510
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If the materials were the same then for sure both would expand equally eventually. Just a matter of how fast they heat up (housing faster). Since the housing is aluminum based I am not sure which would expand more but again it is certain that the difference is biggest at the point where the temperature difference between bearing and housing is largest. Higher heat setting means faster heat build up, so the max difference is reached sooner. Both heat setting and the time you leave it in matters.
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