Metal Final Pinion for Ultima, etc. - Another Option??

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Returning_Jim
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Metal Final Pinion for Ultima, etc. - Another Option??

Post by Returning_Jim »

Rather than buying the hardened final pinion (OT76?) for $35-45, why can't I spend $7 on a regular 32p 19T pinion gear like this...

Image

...Then chuck it up in my lathe, and bore out the ID to the correct diameter? It looks like the set screw would end up right on the flat machined on the top shaft of the gearbox, and everything should be hunky-dory.

Has anyone tried this?

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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by GoMachV »

I have used the Robinson racing pinion and the bore is already 5mm, just pop it on and go

I think Markt73 did this first
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Returning_Jim
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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by Returning_Jim »

Cool.

I just bought a 5mm bore 19t 32p pinion on the 'bay. It will go into the "Crawltima," so we'll see how it goes...

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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by Mr. ED »

I remember the posts about this but forgot whether it was true 32DP or mod1.
thanks for the fresh-up

sdrob
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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by sdrob »

this is pure gold..
i was watching some on ebay but couldn't bring myself to pay that much...
just saved me a mint..
thanks

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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by rccars4sal »

Same boat here. Im building up 2 junked out turbo optimas and another beagle,, and was wondering if the 1/8 pinion gears would fit in the final pinion position. Looks like 32 pitch again on the primary spur and pinion too.

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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by Returning_Jim »

I updated the Crawltima thread with an update about this.

http://www.rc10talk.com/viewtopic.php?f=30&t=37537&p=421870#p421870

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markbt73
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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by markbt73 »

Yep, works like a charm. You need some spacers and a washer or 2. There's a photo of my setup in my Optima thread:

http://www.rc10talk.com/viewtopic.php?f=30&t=30624

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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by Returning_Jim »

Cool.
The one I show in the other thread didn't require any other parts. It really fits like it is meant to be there (in the Ultima, at least). I recommend using that specific one if someone wants to try this.

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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by threesheds »

Reviving this thread re beagle pinions. My beagles got a 15t pinion, anyone know the do? Looks 32dp largish teeth compared to a 0.6 metric.
Would that be the same as optima pinions?

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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by Coelacanth »

markbt73 wrote: Tue Feb 03, 2015 5:31 am Yep, works like a charm. You need some spacers and a washer or 2. There's a photo of my setup in my Optima thread:

http://www.rc10talk.com/viewtopic.php?f=30&t=30624
Thanks for re-sharing that topic, Mark. I'm lucky to have a few spare Hard Final Pinions, as well as an aftermarket Thorp gear...but I know I sure as hell wouldn't pay what sellers are asking for those, for the past half-decade or so. If I ever need to buy another, I'll be going with your suggestion. 8)
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Re: Metal Final Pinion for Ultima, etc. - Another Option??

Post by nikoscfu »

Can u send me an eBay link for a 13T pinion gear for my kyosho outrage. I think it's the same with the Ultima.
Thanks

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