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Magnum 775 Planetary Gearmotor $74 Each
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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any feedback steve or jamus?
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Post Sat Nov 13, 2010 7:52 pm 
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marto
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Joined: 08 Jul 2004
Posts: 5459
Location: Brisbane, QLD


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Not great.

Plates were about 15 degrees out of alignment. So basically impossible to mount. Bolts were very soft half stripped them first time trying to pull it apart.
Bearings were pretty stiff but they might loosen up after a bit of use.

Not battle tested yet.

Steve
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Post Sat Nov 13, 2010 8:09 pm 
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bytraper



Joined: 31 Oct 2005
Posts: 195


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Hey Marto,

I know what you mean, the problem was they shipped them to me loose, so i just tightened them all without the thought to put them on a flat surface first so the ends would line up.

After your ones I redid them all by put the gearbox on a flat surface then re-tightened the bolts.

But while I didn't have any trouble with the screws stripping on any of them though I do agree it's a soft metal.

I guess its why they added the through bolts on the newer ones, to keep them all stable.

Post Mon Nov 15, 2010 7:23 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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Magnums held up well. Haven't disassembled yet but the bot they were in on the second day took some pretty big hits. And are still going.

I had to tap all the holes again as they were pretty tight. No smoke from motors on 6cell A123s.

Pretty happy more testing to come.
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Post Mon Nov 29, 2010 9:17 pm 
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Knightrous
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Joined: 15 Jun 2004
Posts: 8511
Location: NSW


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Steve, are you running the Magnum 550 or the 775?
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Post Wed Dec 01, 2010 3:15 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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550s
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Post Wed Dec 01, 2010 4:43 pm 
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Spockie-Tech
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Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia


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Did anyone find a source for wheel hubs for these motors ?

I have a set to tinker with and have to figure out how to wedge them into I.G's shock-mounted drive rig. Keyed output shaft has me scratching my head a bit.
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Last edited by Spockie-Tech on Thu Jun 16, 2011 5:46 pm; edited 1 time in total

Post Thu Jun 16, 2011 5:37 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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I just got glen to make me a pair. He should be able to sort you out. I also need a set. If you are doing them glen....
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Post Thu Jun 16, 2011 5:45 pm 
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