Kraton Welp, destroyed the pinion gear on my Kraton 6s v6.

[Barmaleus]

Hi folks!

Did a bunch of jumps today, nothing crazy imo - maybe 1-1.5m from the surface. Some runs on the asphalt.
After one of the landings heard that something is wrong (a grinding sound appeared). Eventually found out that a tooth is missing on the pinion gear (16T).

Does it mean I am landing on power or was just unlucky? I do know that landing on power is bad-bad and always try to let go the throttle before the car lands. The mesh was fine from the factory - a tiny bit of clicking between gears, felt good.
Was also wondering if there are any known quality alternatives to the 6s pinion gears (in my case it is ARA310963)?

Thank you!

 

[dure16]

Arrma pinions kind of suck. And yes you probably landed on throttle to cause this.

A Tekno pinion is the right choice for replacement. Much stronger than stock. You need Mod 1 and 5mm bore.

 

[332_RC]

Arrma pinions kind of suck. And yes you probably landed on throttle to cause this.

A Tekno pinion is the right choice for replacement. Much stronger than stock. You need Mod 1 and 5mm bore.

Tekno M5 ^+1

 

[Barmaleus]

Arrma pinions kind of suck. And yes you probably landed on throttle to cause this.

A Tekno pinion is the right choice for replacement. Much stronger than stock. You need Mod 1 and 5mm bore.

Right, thanks!
Mod 1 and 5mm bore - is this the only important criteria to take into consideration?

 

[Neelis]

Right, thanks!
Mod 1 and 5mm bore - is this the only important criteria to take into consideration?

Yes

 

[332_RC]

Tekno M5 pinion & loctite & you're good! The V6 is a 16t, correct? Could go down to 15t, just don't go up. The ESC could amp out under load.

 

[Barmaleus]

Understood. Thanks guys!

 

[Barmaleus]

This one, I believe
https://www.teknorc.com/shop/tkr4176-m5-pinion-gear-16t-mod1-5mm-bore-m5-set-screw/

 

[332_RC]

This one, I believe
https://www.teknorc.com/shop/tkr4176-m5-pinion-gear-16t-mod1-5mm-bore-m5-set-screw/

That's the one! I run Teknos on all my 6s rigs.

 

[Xjeepguy]

Tekno and Robinson have always been my two favorites for pinions.

 

[Barmaleus]

The beauty

 

[RCbuzz]

The beauty

View attachment 422736View attachment 422737

Looks at those camera shots!

I too noticed the Arrma pinions are soft.. After only test running my FT on the bench I noticed wear....

The spurs seem much stronger to me, I wonder if that was done intentionally? Pinion cheaper to replace that a spur?

 

[hobo]

I use hpi pinions for years on most of my cars there machined so last a long time. I've had the tekno ones in the past but there really expensive in the uk love the bigger grub screw though

 

[thewanted]

I use hpi pinions for years on most of my cars there machined so last a long time. I've had the tekno ones in the past but there really expensive in the uk love the bigger grub screw though

They’re only £14 - https://www.eventurerc.co.uk/product-page/tkr4175-m5-pinion-gear-15t-mod1-5mm-bore-m5

 

[Barmaleus]

No Tekno locally, sadly. Grabbed the last Robinson gear LHS had. From what I understand it is a solid one as well. We'll see how it goes.

By the way, do you normally apply Blue or Red Loctite to make sure it stays in place?

 

[332_RC]

No Tekno locally, sadly. Grabbed the last Robinson gear LHS had. From what I understand it is a solid one as well. We'll see how it goes.

By the way, do you normally apply Blue or Red Loctite to make sure it stays in place?

View attachment 423101

It'll be good! Blue loctite. I usually clean out the oil in the threads & grub by applying loctite, run it in the threads, back it out, wipe it clean, re-apply blue loctite.

 

[Barmaleus]

@332_RC Cool, thanks! Installed. Hope to test it tomorrow

 

[RCbuzz]

It'll be good! Blue loctite. I usually clean out the oil in the threads & grub by applying loctite, run it in the threads, back it out, wipe it clean, re-apply blue loctite.

Robinson makes good stuff too.

Ditto what 332 said

 

[thewanted]

I have no idea what this is called, but do you need to install the small thing on the left side of the picture in the link below when replacing the stock v6 pinion with a Tekno one?

https://www.arrma-rc.com/en/product/pinion-gear-16t-hd-mod1-safe-d5/ARA310963.html

 

[Barmaleus]

I have no idea what this is called, but do you need to install the small thing on the left side of the picture in the link below when replacing the stock v6 pinion with a Tekno one?

https://www.arrma-rc.com/en/product/pinion-gear-16t-hd-mod1-safe-d5/ARA310963.html

Do you mean the thing in the middle? E-clip. Makes sense to install. If the grub screw gets loose, the e-clip will hold the gear from flying away.
If you mean the black thing to the left of the e-clip, then of course. I believe this is how they show the grub screw. Which holds the pinion gear