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07-28-2017, 09:52 AM | #1 |
RCC Addict Join Date: Jan 2016 Location: Kelowna, BC
Posts: 1,274
| Smallest pinion on kit tranny?
Not that I'm expecting this to be a thread with lots of action but I couldn't find this info when I searched for it, so I'm starting a thread with my own findings to hopefully benefit the next person that tries to search for this kind of info. I put a Holmes Hobby 3500Kv Puller Pro in in 10.2 (running 3S). With stock gearing (15/56 in the kit) that effectively made it into a race car. This leads me to a hunt for the smallest pinion gear I can fit - there isn't a ton of room to drop teeth since the can hits the tranny housing, but there is definitely some room to drop teeth. I haven't been able to determine if there's a larger spur that would fit, but there's not a lot of additional room under the gear cover to allow for that - if something does exist, I'm going to speculate that 58 would probably be the largest spur that would fit. 9 tooth doesn't fit - the gears almost mesh, but they're still about 1mm away from being a good fit. Tonight/this weekend I'm going to try a 10 tooth. I think that will probably fit, I'll update the thread after I try it out.. |
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07-28-2017, 11:47 AM | #2 |
Rock Stacker Join Date: Sep 2015 Location: Simi
Posts: 85
| Re: Smallest pinion on kit tranny?
I run a 12 with a brushed motor
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07-28-2017, 12:29 PM | #3 |
I wanna be Dave Join Date: Feb 2013 Location: NW Indiana
Posts: 3,196
| Re: Smallest pinion on kit tranny?
My kit came with 56/12 as the stock gears...which I am running the HH puller pro 3500kv and the HH trailmaster BLE ESC...on 3s
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07-28-2017, 12:45 PM | #4 | |
RCC Addict Join Date: Jan 2016 Location: Kelowna, BC
Posts: 1,274
| Re: Smallest pinion on kit tranny? Good to know, I assumed 12 would fit as I've got a 13 on now and there's still some room to go.. Quote:
Seems kits are all over the map on the stock gearing.. Axial lists the kit as 56/15 (that's what mine came with) and the RTR's as being 13/56 but you're definitely not the first person I've encountered that got something else... | |
07-28-2017, 05:55 PM | #5 |
Pebble Pounder Join Date: Jan 2014 Location: Eugene
Posts: 92
| Re: Smallest pinion on kit tranny?
Im currently running a 10t with a 35t brushed motor and two speed tranny, the clearance isnt an issue at the pinion. It creeps when it needs to in 1st then 2nd gear plus 3s has been more than enough wheel speed so far. Gearing down has helped provide more torque in 2nd gear.
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07-28-2017, 07:47 PM | #6 |
Pebble Pounder Join Date: Dec 2013 Location: brockville
Posts: 158
| Re: Smallest pinion on kit tranny?
I'm running a 12t on the stock spur. 2300 kv roc412 on 3s Sent from my SM-G935W8 using Tapatalk |
07-31-2017, 09:15 AM | #7 | ||
RCC Addict Join Date: Jan 2016 Location: Kelowna, BC
Posts: 1,274
| Re: Smallest pinion on kit tranny? Quote:
I'm asking because I couldn't get a 10t to mesh anywhere near properly on a stock kit tranny.. Quote:
Yeah, I think 12t is the limit. I tried an 11t and it was close but wouldn't mesh quite properly. The 11t only needs a tiny bit more room, probably .010"-.020" or less. I may try dremeling the motor mount to see if I can get the 11t to mesh properly but so far it's looking 12t is the low limit. I"m not overly optimistic about being able to get the 11t on there properly - the can is pretty much jammed against the trans case as it is, so I don't know if it will move any further.. | ||
07-31-2017, 09:44 AM | #8 |
Pebble Pounder Join Date: Dec 2013 Location: brockville
Posts: 158
| Re: Smallest pinion on kit tranny?
It's def at the max with a 12 now.could easily dremel it out tho, but I'm happy with the 12 Sent from my SM-G935W8 using Tapatalk |
08-01-2017, 10:23 AM | #9 |
Rock Stacker Join Date: Jun 2017 Location: Italy
Posts: 55
| Re: Smallest pinion on kit tranny?
my kit arrived with 15/56. I'm running with 14t pinion and HH torquemaster pro 30t at 3s, it's perfect |
09-05-2017, 10:38 AM | #10 |
Quarry Creeper Join Date: May 2009 Location: Scotland, UK
Posts: 401
| Re: Smallest pinion on kit tranny?
Having picked myself up a SCX10 II kit, it's got the 15/56 gearing just now. Does anyone know if a larger spur will fit yet? Does anyone have any videos of 12/56 running? |
09-06-2017, 10:48 AM | #11 |
Rock Stacker Join Date: Sep 2015 Location: Simi
Posts: 85
| Re: Smallest pinion on kit tranny?
I don't got video of 12/56. It worked. I did move up to a 13 and really liked the little extra wheel speed and my temp was still fine on the motor/ESC so I just changed it to a 14 and will try that this weekend. Just get a few pinions and play around and see what works best for you.
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09-06-2017, 02:35 PM | #12 | ||
RCC Addict Join Date: Jan 2016 Location: Kelowna, BC
Posts: 1,274
| Re: Smallest pinion on kit tranny? Quote:
What motor/battery do you plan to run? Quote:
I've settled in at 11, I might be able to get a 10 on but I'm happy with the 11 for my set-up.. According to the highly accurate method of trigger finger feel, 11/56 on 3500KV gets about the same wheel speed as 15/56 on 35 turn.. | ||
09-06-2017, 02:51 PM | #13 | ||
Quarry Creeper Join Date: May 2009 Location: Scotland, UK
Posts: 401
| Re: Smallest pinion on kit tranny? Quote:
Quote:
I see GPM do a steel pinion that fits under the standard cover that's 57t so if i strip my spur by poor mesh with the 11t i might try the 57t | ||
01-06-2018, 02:12 PM | #14 |
Newbie Join Date: Dec 2017 Location: Atlanta
Posts: 8
| Re: Smallest pinion on kit tranny?
Older thread, but figured I'd post this for anyone else looking. A 10T pinon will work for the kit tranny with a Castle 1406 Slate/crawler motor and the stock 56T spur. However there is literally zero room left, if your motor OD is any larger, you won't be able to get a proper gear mesh. 1406 2280kV, 10/56 gearing, and a SSD two speed is a great combo. 15/56 was also pretty great on 2S with the two speed as well. |
01-09-2018, 10:39 PM | #15 |
Newbie Join Date: Dec 2012 Location: Honolulu
Posts: 20
| Re: Smallest pinion on kit tranny?
I am using the same HH 3500kv motor with a mamba X I was able to fit a 9 tooth on the kit version trans How ever it did involve some minor dermal work |
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