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WTB driven gear(s)

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Wanted WTB driven gear(s)

Post  Liquidice on Fri Oct 19, 2018 10:01 am

I just purchased a few of the old gear driven Cox car chassis and now I need at least one of the driven gears for the axles.  These are the gears with a hex shaped hole in the center that connect to a hub on the inside of the right rear wheel.

Please feel free to message me or email at cal_leggett@hotmail.com.

I'm new to the forum but have been into various Cox vehicles off and on since I was a kid.  Looking forward to all of the information I've yet to read on this forum!
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Wanted Re: WTB driven gear(s)

Post  Marleysky on Fri Oct 19, 2018 2:56 pm

Chicken teeth, sometimes you can find them.  There looks to be one in this ebay listing:  https://www.ebay.com/itm/Vintage-Cox-049-Engines-parts-Lot-car-parts/183484039315?hash=item2ab8804093:g:ve4AAOSwtFxboaEq
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Wanted Re: WTB driven gear(s)

Post  Liquidice on Fri Oct 19, 2018 11:10 pm

Yes, I found that auction as well. However the teeth on the gear appear to be pretty chewed up. If I can't find a Cox replacement I guess the next step will be trying to make one out of a comparable gear by cutting out the hex in the center.
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Wanted Re: WTB driven gear(s)

Post  dckrsn on Fri Oct 19, 2018 11:41 pm

If all else fails, you can break out the micrometer(or small rule), and try here.
Explore the left sidebar.
https://www.mcmaster.com/metal-gears

Bob
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Wanted Re: WTB driven gear(s)

Post  getback on Sat Oct 20, 2018 9:19 am

Marleysky wrote:Chicken teeth, sometimes you can find them.  There looks to be one in this ebay listing:  https://www.ebay.com/itm/Vintage-Cox-049-Engines-parts-Lot-car-parts/183484039315?hash=item2ab8804093:g:ve4AAOSwtFxboaEq
Hey Mark do you know what that muffler pipe goes on i have a couple of them with some extra odds and ends Babe Bee .049
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Wanted Re: WTB driven gear(s)

Post  OVERLORD on Sat Oct 20, 2018 4:03 pm

Liquidice wrote:I just purchased a few of the old gear driven Cox car chassis and now I need at least one of the driven gears for the axles.  These are the gears with a hex shaped hole in the center that connect to a hub on the inside of the right rear wheel.

Please feel free to message me or email at cal_leggett@hotmail.com.

I'm new to the forum but have been into various Cox vehicles off and on since I was a kid.  Looking forward to all of the information I've yet to read on this forum!

They are easy to find. As per your descrîption, I think it's a Jerobee gear you need. Search on eBay under the name Jerobee or jomac, not Cox. You have to count the teeth as there are different types.

https://www.ebay.fr/itm/Vtg-Joemac-Jerobee-1124-54T-Gear-RC-Car-New-NOS/192684697479?hash=item2cdce72787:g:K7QAAOSwPJxbjDhM:rk:31🇵🇫0

Lieven
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Wanted Re: WTB driven gear(s)

Post  Liquidice on Sat Oct 20, 2018 4:36 pm

I can't find any of the Jerobee gears that fit however I think I have found one that could work with some modification:
https://www.mscdirect.com/product/details/03125424
As recommended, I got out the calipers and took some measurements to find a comparable gear. MSC wants $12.50 in shipping which is crazy, but I'm planning to contact them directly to see if they will work with me on that. I'm still looking for an original, but if I get one of these in and successfully make it work I'll post details in the model forum.
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Wanted Re: WTB driven gear(s)

Post  crankbndr on Sat Oct 20, 2018 5:20 pm

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Wanted Re: WTB driven gear(s)

Post  Oldenginerod on Sat Oct 20, 2018 6:08 pm

I think I have a Jerobee gear somewhere. When I get a chance I'll find it and take some measurements.

Rod.
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Wanted Re: WTB driven gear(s)

Post  Jason_WI on Sat Oct 20, 2018 11:28 pm

If you know the tooth pitch, thickness, and hex hole size I could 3D print them out of nylon. There are a couple of openscad gear generators on thingiverse that can be used to generate the gear then can import into tinkercad to make the hex hub.
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Wanted Re: WTB driven gear(s)

Post  Liquidice on Sun Oct 21, 2018 8:59 am

That sounds like a great plan. I will contact you later today once I get back home with the measurements. Once we get one printed I will photo document the process of testing it on the car and create a post in the models section for others to follow. Sounds like this could be an interesting project!
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Wanted Re: WTB driven gear(s)

Post  dckrsn on Sun Oct 21, 2018 4:51 pm

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Wanted Re: WTB driven gear(s)

Post  Liquidice on Sun Oct 21, 2018 5:46 pm

That's the one...thank you for the heads up!
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Wanted Re: WTB driven gear(s)

Post  dckrsn on Sun Oct 21, 2018 6:48 pm

Liquidice wrote:That's the one...thank you for the heads up!
Good luck, hope you win it.
Bob
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Wanted Re: WTB driven gear(s)

Post  Jason_WI on Sun Oct 21, 2018 11:47 pm

$19.99 plus shipping O_O
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