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03-29-2013, 11:29 PM
| #1 |
| Rock Crawler Join Date: May 2008 Location: At the corner of Bedlam and Squalor.
Posts: 712
|  Outrunners
My brother, who is amazing at crashing RC planes, stopped by today and gave me a couple of BL outrunner motors. They're both about 950kv and have the correct mounting holes. Pretty cool so far. The only hitch is the 5mm output shaft. I was thinking about drilling out a 20t pinion to fit, but realized the pinion for my GRU is way smaller, so that's a no go. Any thoughts on getting the output shaft down to size using a small vise, a Dremel and some files?
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03-30-2013, 01:04 AM
| #2 |
| I wanna be Dave  Join Date: May 2006 Location: HONDURAS...ROCK HEAVEN
Posts: 5,076
| Re: Outrunners  |
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03-30-2013, 01:06 AM
| #3 |
| I wanna be Dave Join Date: May 2006 Location: HONDURAS...ROCK HEAVEN
Posts: 5,076
| Re: Outrunners
Thatīs what i did, filed down the shaft enough to accomodate the pinion, pretty easy  |
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03-30-2013, 12:37 PM
| #4 |
| Rock Crawler Join Date: May 2008 Location: At the corner of Bedlam and Squalor.
Posts: 712
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How did you keep the metal filings out of the magnets? Seems like it will get messy
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03-30-2013, 02:01 PM
| #5 |
| I wanna be Dave Join Date: Oct 2010 Location: Caldwell ID.
Posts: 4,328
| Re: Outrunners
Put a plastic bag around the motor, poke just the shaft through and that will minimise the metal shavings on the magnets.
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03-30-2013, 11:45 PM
| #6 |
| Quarry Creeper Join Date: Feb 2011 Location: Forbestown, CA
Posts: 417
| Re: Outrunners
;) had this issue pushing a pro4 5.5t into mine i used this TowerHobbies.com | Axial Pinion Gear 32P 12T Steel 5mm Motor Shaft -- make sure you find one with the correct pitch though.
Last edited by Absurd; 03-31-2013 at 02:10 PM. |
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03-31-2013, 01:58 AM
| #7 |
| Rock Crawler Join Date: May 2008 Location: At the corner of Bedlam and Squalor.
Posts: 712
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Is the internal gearing on the rc4wd GRU 32p? I thought it was much finer than that. If it is, this is a great solution. Thanks.
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03-31-2013, 02:09 PM
| #8 |
| Quarry Creeper Join Date: Feb 2011 Location: Forbestown, CA
Posts: 417
| Re: Outrunners
correct this will not fit the normal gru from rc4wd or the little one in the picture, if I was stuck in this spot I would reduce the shaft to 4mm and drill the pinion out to 4mm to keep some meat on both. or find someone to trade your motor with |
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03-31-2013, 06:11 PM
| #9 |
| Rock Crawler Join Date: May 2008 Location: At the corner of Bedlam and Squalor.
Posts: 712
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My other ideas, if I don't turn it down myself, would find a friend with some proper gear for turning the shaft or drilling out a 20t pinion and eliminating the GRU. I tried drilling out a pinion myself, but it was a little (really) wobbly.
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