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08-08-2018, 09:02 PM
| #1 |
| Rock Stacker Join Date: Apr 2009 Location: Chino Hills
Posts: 62
|  gearing question
I have a twin hammers built from a kit with a hh torquemaster 13t motor controlled by a brxl escand I burnt the motor in a 30 minute run on 3s. I am using the original 78t spur but i went down to a 22t pinion from 28 which was the lowest pinion for that spur in the chart. justin at HH recommends getting the final drive down to 35:1 but being new to changing gears how would I achieve this while being able to keep the speed up as it will spend most of its life in high gear with the occasional crawling. any help is appreciated as I just want to drive this thing. thanks
Last edited by socal gto; 08-08-2018 at 11:19 PM. |
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08-08-2018, 09:03 PM
| #2 |
| Rock Stacker Join Date: Apr 2009 Location: Chino Hills
Posts: 62
| Re: gearing question
ring and pinion ratio is 2.86 and trans is 2.27 if that helps
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08-08-2018, 11:17 PM
| #3 |
| RCC Addict Join Date: Nov 2016 Location: 1972 born Christian, Chinese.
Posts: 1,321
| Re: gearing question
Simple just change the motor to high kv brushless motor. Cheers
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08-08-2018, 11:58 PM
| #4 |
| Quarry Creeper Join Date: Mar 2018 Location: Indonesia
Posts: 287
| Re: gearing question
Try asking John Holmes at Have tech questions? Will answer. for an answer. I'm pretty sure he will recommend a brushless 3500KV or something similar for your use.
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08-09-2018, 05:59 AM
| #5 |
| Rock Stacker Join Date: Apr 2009 Location: Chino Hills
Posts: 62
| Re: gearing question
their website recommends the torquemaster 13t
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08-09-2018, 10:04 AM
| #6 |
| Quarry Creeper Join Date: Mar 2018 Location: Indonesia
Posts: 287
| Re: gearing question
Have a look at the Holmes Hobbies YouTube channel and see what John says about brushed versus brushless for bashing vs crawling. No one motor can do everything well, it's all about trade-offs.
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08-09-2018, 07:09 PM
| #7 |
| I wanna be Dave  Join Date: Feb 2013 Location: NW Indiana
Posts: 3,196
| Re: gearing question
you need to get the spur and pinion ratio down towards 5:1 to give that 13t torque master any chance for survival...
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08-09-2018, 08:31 PM
| #8 |
| Rock Stacker Join Date: Apr 2009 Location: Chino Hills
Posts: 62
| Re: gearing question
i'm not sure how to do that I've never had to switch gearing around before. I would love some input y'all speaking Greek to me
Last edited by socal gto; 08-09-2018 at 08:37 PM. |
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08-13-2018, 08:22 PM
| #9 |
| I wanna be Dave Join Date: Feb 2017 Location: My mothers basement
Posts: 2,128
| Re: gearing question Twin Hammers Gear Chart You can get a 22t pinion for Twin hammers and it will put you at 40/1, slow you down and save motors. Also a higher T (turn) motor like 27t will slow you down as well. But slow it down with gears first in my opinion. Last edited by Voodoobrew; 08-13-2018 at 08:31 PM. |
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08-13-2018, 09:20 PM
| #10 |
| Rock Stacker Join Date: Apr 2009 Location: Chino Hills
Posts: 62
| Re: gearing question
I had the 22 pinion in the rig when the motor went south.
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08-14-2018, 01:01 AM
| #11 |
| I wanna be Dave Join Date: Feb 2017 Location: My mothers basement
Posts: 2,128
| Re: gearing question
Does the drive train spin freely? That could over heat motors too.
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08-14-2018, 06:50 AM
| #12 |
| Rock Stacker Join Date: Apr 2009 Location: Chino Hills
Posts: 62
| Re: gearing question
yup no binding whatsoever.
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08-14-2018, 08:10 AM
| #13 |
| Rock Crawler Join Date: May 2018 Location: USA
Posts: 792
| Re: gearing question
He recommends the crawl master 13t, NOT the torquemaster. That motor will fry at that gearing, as it did. Everyone I see running a twin hammers on here goes brushless though, that’s a heavy fast rig.
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08-14-2018, 12:08 PM
| #14 |
| Rock Stacker Join Date: Apr 2009 Location: Chino Hills
Posts: 62
| Re: gearing question
per their motor recommendations page I ordered the torquemaster but since it failed will rebuild it and try and sell itand the esc as I just ordered a brushless setup
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