High quality gearbox for Speed 300 - RC Groups
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Feb 24, 2004, 04:19 PM
SAM Elec GrdChmp04,07,10,12,14
Jay Burkart's Avatar

Need High quality gearbox for Speed 300

Anyone have any idea where I might find a high quality
low loss gearbox for the Speed 300 motor?
I'm looking for around a 4:1 ratio.

I thought of adapting a small Maxon or maybe a Cosmotech.
I had hoped there might be one ready to use out there.

The MPJet series just isn't good enough for my use.

Any help?

Last edited by Jay Burkart; Feb 24, 2004 at 08:21 PM.
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Feb 24, 2004, 04:29 PM
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pda4you's Avatar
I really think you can't beat the GWS gearboxes. I think they are good and you can't beat the price.

They are quiet as well.

Feb 24, 2004, 08:18 PM
SAM Elec GrdChmp04,07,10,12,14
Jay Burkart's Avatar

Thanks for the input. The GWS box won't due for my needs.
I'm using it in a new competition event and will push the
300 very hard to probably needing to replace it every couple of flights, so the gearbox needs to be strong and keep it's alignment. So I am looking at for something like a planetary.
My friend saw an article where there might be a cosmotech box coming out to fit the 300 and some of the smaller brushless that use the same size pinion and hole pattern, but I have not been able to find it available.
I hope that someone has made an adapter to the Maxon 4.4:1.

Thanks again,
Jay Burkart
Feb 25, 2004, 12:07 AM
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ptglass's Avatar

How about this one?

This is a new one from Top Creations. It's made out of metal and appears to be very rugged.


Feb 25, 2004, 12:11 AM
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ptglass's Avatar

Picture didn't attach - try again!

Hopefully the picture will attach.
Feb 25, 2004, 03:42 AM
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vintage1's Avatar
Not sure if it would adapt, but the VMGM box might fit - as used on teh Model Motors Mini AC 1215 range.


I guess you would need to bush out the pinion - its for 2.3 or 3.17mm shafts, but its a very tough box by all accounts.
Feb 25, 2004, 09:41 AM
Registered User
pda4you's Avatar
The GWS box won't due for my needs.
I have run 150w through the GWS gearbox (brushless) with nary a failure yet. Others have done more! I don't know of any s300 that will do that. They are amazing little gearboxes, Trust me - see if you can burn it up!


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