What would cause this?
 

I just got done running a bout a pack and a half through my truggy.. its got a hardened steel spur gear... well lets just say the spur gear won..
http://i152.photobucket.com/albums/s...1117081706.jpg

This gear is of unknown origin, i doubt it is hardened. but any idea what would cause the gear to be sharpened like this?:neutral:

I have seen some sprockets in my line of work that look like that but that was after a couple of years of service...IMO its just wear....

i was only running for 1/2hour though?

when i got it it had moderate wear but thats 5x as bad as it was

Well, two things that I can think of:

1) Not being hardened will eat those things up fast.

2) Tooth shape. Not all Mod1 pinions are the same. If you look at Mike's old pinions, they have a different shape than the ones he has today. The old ones were made to use with a plastic spur and are shaped accordingly for proper mesh. His current pinions, along with being hardened, have a slightly different shape so they work well with both plastic spurs and steel spurs.

Friction.:mdr:

ok, so a new rcm should be fine with a hardened spur?

In short: Yes. :smile:

In short thank you:yes:

Just placed my order for a rc-monster 13t hardened pinion :)

PS check your bearings - all that metal will have gone everywhere...

will do:yes:

That's what my Rustler's diff gears look like after a few runs............:whistle:

is this the rocket-explosion-explosive rustler that your talking about?:lol:

Yeah...:lol: 4s/6s and a Lehner 1940/7.

is that really necesarry?:whistle: