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Old Jun 04, 2004, 06:11 AM
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EddieNewYork's Avatar
Los Angeles, CA
Joined Apr 2004
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Please help me with my gobrushless DIY kit

Hi,

I ordered the DIY kit from gobrushless.com, and I want to build it with a 2mm shaft, but the bell that came with the kit has a 3mm hole. I purchased the 6x2 bearings for a 2mm shaft, and I would just order a new bell with a 2mm hole; however, they only sell it for the 25mm stators, and I'm using the 22.7mm stator which comes in the kit. What do you guys think is most economical way to fit a 2mm shaft into a 3mm hole.

Cheers,

Eddie
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Old Jun 04, 2004, 06:45 AM
RIP Ric
Andy W's Avatar
Marietta, GA
Joined Jun 1999
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Get a 3mm shaft and turn the end down to 2mm.
..a
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Old Jun 04, 2004, 07:18 AM
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EddieNewYork's Avatar
Los Angeles, CA
Joined Apr 2004
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Quote:
Originally Posted by Andy W
Get a 3mm shaft and turn the end down to 2mm.
..a
How does one turn the end down? Do you mean on a lathe? And if I don't have access to one, is there an alternative solution?
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Old Jun 04, 2004, 08:38 AM
RIP Ric
Andy W's Avatar
Marietta, GA
Joined Jun 1999
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Find a piece of 3mm OD 2mm ID material and use it as a sleeve, but I doubt you'll have success here.
..a
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Old Jun 04, 2004, 08:47 AM
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southern jersey
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You might find it easier to just adapt your prop/pinion or whaterver to the 3mm shaft. Thats what I did with my heli.
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Old Jun 04, 2004, 12:14 PM
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Ithaca, NY USA
Joined Oct 2000
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Hi Eddie,

Maybe the bell for the 25mm stator would work with the 22.7mm stator if you used 2mm thick magnets instead of the 1mm thick magnets provided in the kit.

-Bob
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Old Jun 04, 2004, 01:25 PM
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EddieNewYork's Avatar
Los Angeles, CA
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I'll see what I can come up with, thanks guys. btw, Twister6er how did you get a 2mm pinion to fit? Did you just drill the hole in the pinion larger?
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Old Jun 04, 2004, 01:41 PM
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Cyberman's Avatar
Pittsburgh, PA
Joined Apr 2004
569 Posts
Are you planing on swinging a really big prop with the motor? Most people avoid gearing down the output of these motors. What often they do is decrease the RPM/v and raise the voltage and direct drive a prop. Unless it's a monster this is a much better route and less work on your part.

Perhaps a better thing is, what are you trying to swing with the motor?

Cyb/Stephen
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Old Jun 04, 2004, 01:53 PM
GreeneAeroFlyers
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Greeneville, TN
Joined Mar 2004
287 Posts
Most the pinion gears for the 2mm shaft are also available for the s400 with a 3mm shaft.

Ken
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Old Jun 04, 2004, 03:19 PM
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southern jersey
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Eddie, I just bought a 48 pitch pinion for a 3mm shaft. I think it was by HPI for an RS4 street car.
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Old Jun 04, 2004, 06:00 PM
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Los Angeles, CA
Joined Apr 2004
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Its actually for my micro heli's (Century Hummingbird) main motor . I use a 10 and 11 tooth pinion for them. I also use micro rs4 pinions, but I don't think those come in 3mm, do they?

I'm also building a second for my tail, but I think the 3mm will work fine for that since I think I can just push the prop on with a gws rubber prop adapter.
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Old Jun 04, 2004, 06:29 PM
Master of the Wind
AIR MOVER's Avatar
TEXAS
Joined Jun 2001
3,044 Posts
buy the big bell .. use your 22.7 stator buy 2mm mag and your set here is a pic... of the modified motor useing what parts steve sells.. use his motor bearing tube it will work with your 2mm bearings..
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Old Jun 04, 2004, 06:34 PM
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EddieNewYork's Avatar
Los Angeles, CA
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Do you mean just I should just buy the stock can for the 25mm Stator, and use my 22.7mm stator, like what Bob said? Will I need to order the thicker magnets too?
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Old Jun 04, 2004, 08:08 PM
Master of the Wind
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TEXAS
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yes it will give you a more powerful motor for sure I have done 3 motors this way.to include a amazeing 12mag 12 pole this way.
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Old Jun 18, 2004, 08:00 AM
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davidsons's Avatar
Allen, Texas
Joined Feb 2004
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Hey Air Mover

Quote:
Originally Posted by AIR MOVER
buy the big bell .. use your 22.7 stator buy 2mm mag and your set here is a pic... of the modified motor useing what parts steve sells.. use his motor bearing tube it will work with your 2mm bearings..

What did you use for the shaft in this setup?

Steve
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