Kraton 6s EXB Shaft Cup/Main Input Gear Shaft Wobble?

[Rottster]

Are they all like this? Thought I'd have seen this when I assembled this on day one. Front has about the same wobble.

 

[RC Steve]

That cup is off center or out of alignment on every 6s Arrma I own. I used to stress about it, now I just ignore it and move on.

 

[Rottster]

That cup is off center or out of alignment on every 6s Arrma I own. I used to stress about it, now I just ignore it and move on.

Sounds like a plan, thanks for the advice!

 

[Big Kid]

Honestly would say it is the PLASTIC cast over the STEEL inner yoke that has the run out

I have for years now made ( machined ) my own drive yoke sleeves ... no run out

 

[RyanC1332]

Yeah mine does it too stupid plastic piece made me think I bent my pinion thing lol

 

[Garcbomber]

She’ll balance out nicely going a few thousand rpm.
Is your cup set screw snug on the input shaft flat?

I made an input shaft jig to put the assembly in the lathe collet and just turn-smooth the plastic for aerodynamics, then balance by drilling blind holes… cuz racecar

 

[Rottster]

Honestly would say it is the PLASTIC cast over the STEEL inner yoke that has the run out

I have for years now made ( machined ) my own drive yoke sleeves ... no run out

View attachment 352933

Nice work brother!

She’ll balance out nicely going a few thousand rpm.
Is your cup set screw snug on the input shaft flat?

I made an input shaft jig to put the assembly in the lathe collet and just turn-smooth the plastic for aerodynamics, then balance by drilling blind holes… cuz racecar

WE do this stuff because we can and we want to.