CR-01 Ghetto Modded Driveshafts

[Illogical 141]

So I upgraded my CR-01 Rock Socker with a 13.5T 3050KV motor and this is what happened after a couple of 7.2 NiMh packs:

As you can see the rear one has started to twist due to the increased torque.

These parts are hollow so I decided to strengthen them by finding a suitable screw to put through the middle:

I needed to use the Dremel on the screw head to reduce its diameter, I also had to cut back the threads a little otherwise the shaft would bulge and bind in the other half of the shaft.

I screwed them all the way in and the screw head allows just enough angle on the joint part so there's no issues there. I considered holding the soldering iron onto the screw to melt the plastic onto it or use some superglue or UHU adhesive to bond the parts - but because the screws are a tight fit already I decided to leave them without for now.

So far, so good. I'll keep an eye on them.

 

 

[richb77 78]

Can you not get metal upgrades for this?

i know that's not in the spirit of your mod but I am surprised how carp these rock crawler drive trains are (I have never seen a CR-01 but own a SCX10 that was plastic flex heaven until you swap it all out!)

[Illogical 141]

Yes hardened steel ones are available but they would take a while to arrive so I decided to try a quick fix and see how long they last.

The steel ones are also quite expensive:

https://www.tamiyausa.com/product/item.php?product-id=54113

[richb77 78]

Holy moly. $42 plus shipping! 

It's a good temporary fix but you may only be delaying the inevitable. Some Chinese aftermarket supplier must able able to do them cheaper than $42!

[waterbok 1284]

Junfay has some nice driveshafts too as do MIP. Pity Banzai dont do Tamiya anymore

But there is always http://www.modellbau-seidel.de/index.php?firma=Tamiya&best=54113