Custom transfer case - gear recommendations?

[jebster]

Soi have a large and heavy rig that uses a transfer case as the input point for the entire drive train. You can set the setup in my build thread (best pic is in post 42): http://www.rccrawler.com/forum/mult...-10x10-hemtt-rollback-hauler.html#post5939405

For transfer cases I've been running some fairly cheap units from ebay: https://www.ebay.com/itm/133159361281

I think they are fine for the downstream axle connections but I just blew up that front unit. I think it is too much load for the cheap gears to handle.

So, I want to custom build a transfer case. The constraints are it needs to be similar in size to what I have because there is very little room to work with, output shafts need to be 5mm and I need it to be around a 2:1 ratio (give or take).

I think a simple 2 gear setup would do the job. Make up a couple side plates to carry bearings, run 5mm shafts through and it is done. The issue I'm having is finding gears. I'd like to use some 32p hardened gears but I'm not sure which ones. Looking for recommendations. I could use pinion gears but they would make the transfer case thick, maybe too thick. The alternative is some type of gear that rides on a pin but I'm having trouble finding many size options. Here is an example: https://www.ebay.com/itm/361289052915

All inputs are welcome.

 

[MasteroFlego]

You can get gears on McMaster Carr but they seem kind of expensive, at least compared to most RC gears.

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[jebster]

You can get gears on McMaster Carr but they seem kind of expensive, at least compared to most RC gears.

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Not a bad idea.. I looked at what they have. Doesn't look like the have any hardened gears with a 5mm bore. Thanks for the input.

 

[MasteroFlego]

Not a bad idea.. I looked at what they have. Doesn't look like the have any hardened gears with a 5mm bore. Thanks for the input.

You'll probably find the greatest selection of hardened 5mm gears are used for RC, usually as pinions

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[WHITE-TRASH]

No need to reinvent the wheel. Toyzuki already makes what you want using axial trans gears.

 

[Almighty Malach]

Robinson Racing makes 5mm bore 48p gears that will do exactly what you want.

 

[Stollenritter]

Robinson Racing makes 5mm bore 48p gears that will do exactly what you want.

I second the (hardened) robinson racing pinions, also in 32p / 5mm bore:
https://www.rcmart.com/Robinson-Racing

 

[jebster]

I second the (hardened) robinson racing pinions, also in 32p / 5mm bore:
https://www.rcmart.com/Robinson-Racing

That was looking like my most likely solution. Provides lots of gear options.

Robinson Racing makes 5mm bore 48p gears that will do exactly what you want.

No need to reinvent the wheel. Toyzuki already makes what you want using axial trans gears.

I didn't realize he made a transfer case. Thought it was just the forward mount run into an axial 3 gear tyranny. It might be wider than I was hoping to achieve but the wider gears could be worth trying to make it fit for the strength. Is Toyzuki still active? I tried a pm but the inbox is full.