Pinion size

[austin-92]

Are these compatible with my scx10.2? Can’t find pinion shaft diameter anywhere.


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[ToCrawl]

The mentioned 3.175 mm must be the shaft diameter as it is on holmes motors as well. Nice set!

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[ToCrawl]

They have 32p teeth. Axial speaks about 48p with the AX30569 on their site for th SCX10 III. I'm used to 32p at Axials on RR10 and SCX10 II usually.

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[austin-92]

So it will work on a 10.2 but not 3?


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[HumboldtEF]

Originally Posted by austin-92

So it will work on a 10.2 but not 3?


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I think it should work for both the 2 and 3


From what I've seen the 10.3 manual lists 48P gears but people mentioned it actually having 32P which is what Axial has always used I believe. they had a bunch of errors in their 10.3 manual.


Most 1/10 scale motors have a 1/8" or 3.175 MM shaft, unless you've sourced a new motor with a 5mm shaft which you'd probably know about.


What motor do you have?

[austin-92]

Stock axial 35t but I foresee a hh crawlmaster in the near future


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[HumboldtEF]

Originally Posted by austin-92

Stock axial 35t but I foresee a hh crawlmaster in the near future


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both use 1/8" shafts so you're good

[austin-92]

Originally Posted by HumboldtEF

both use 1/8" shafts so you're good

Thanks for the wisdom!


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[austin-92]

So I finally got around to playing around with these gears. I was going to run the 9t but the motor wouldn’t slide close enough to the spur. Tried the 10t, same thing, finally I got a decent mesh with the 11t and it’s still faster than I’d like.

Can a larger diameter spur fit in the stock case? Thinking about ordering one of these




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[Phildirt]

I am running an 87t spur/12t pinion in my SCX10 and it is definitely not too fast. Current motor is 27t Holmes 550 sport on 2s. Definitely a good crawling setup, gobs of torque. But not a ton of wheel speed, top end is about a fast walking pace.

[austin-92]

Originally Posted by Phildirt

I am running an 87t spur/12t pinion in my SCX10 and it is definitely not too fast. Current motor is 27t Holmes 550 sport on 2s. Definitely a good crawling setup, gobs of torque. But not a ton of wheel speed, top end is about a fast walking pace.

Where did you get that spur gear?


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[Phildirt]

Originally Posted by austin-92

Where did you get that spur gear?


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No idea, previous owner installed it. Along with a 20t pinion and 550 12t motor...fried like bacon lol.

When I was planning on swapping up things to ‘gear down’ I shopped for that size spur not knowing I already had one and from what I recall there were quite a few options. I think the on I was going to get was Hot Racing.

[austin-92]

Im only seeing 56t mainly. Found a 60t then a 64t but now I can’t find the 64t again... I don’t understand why this isn’t more available.


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[Phildirt]

If you’re looking for an 87 here’s one. I’d confirm the pitch or whatever the “p” stands for though. I just googled “Axial 87t Spur Gear”

https://www.amazon.com/Axial-AX30672.../dp/B000U2TJFU

[lonleycreeper]

Originally Posted by Phildirt

If you’re looking for an 87 here’s one. I’d confirm the pitch or whatever the “p” stands for though. I just googled “Axial 87t Spur Gear”

https://www.amazon.com/Axial-AX30672.../dp/B000U2TJFU

That is a 48p(pitch) spur gear...

It is what I run in the rigs I need geared low... make sure you get a 48p pinion too... 12-14t is my recomendation

[lonleycreeper]

Originally Posted by Phildirt

If you’re looking for an 87 here’s one. I’d confirm the pitch or whatever the “p” stands for though. I just googled “Axial 87t Spur Gear”

https://www.amazon.com/Axial-AX30672.../dp/B000U2TJFU

That is a 48p(pitch) spur gear...

It is what I run in the rigs I need geared low... make sure you get a 48p pinion too... 12-14t is my recomendation...

Btw Axial scx10 kits, used to come with 14\87 gearing...

[austin-92]

I already bought this set of 32p pinions I’d like to make use of but if I have to swap pitches I guess I will. I think the 87t would almost be too much. Hell, the stock 56t would be fine with a 9t pinion but it won’t reach lol. Seems 32p isn’t as common


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[ToCrawl]

To reduce wheel speed underdrive bevel gears are an option. 10.2 stock are 30T/8T. VP has 33T/8T fore instance #VPS08331. Doing this on both axels is not wrong to gear down the drivetrain lately. So you get the torque where you need it.

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[austin-92]

Originally Posted by ToCrawl

To reduce wheel speed underdrive bevel gears are an option. 10.2 stock are 30T/8T. VP has 33T/8T fore instance #VPS08331. Doing this on both axels is not wrong to gear down the drivetrain lately. So you get the torque where you need it.

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Yeah, those have definitely been on my radar since they came out. It’ll help with torque twist and relieve a little stress off the the drive shafts and transmission too but the price has kinda kept me from picking up a set for each axle. Thought about doing the rear first then the front at some point


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