5mm vs. 1/8"
 

what's the benefit of having the 5mm shaft on the 9L Feigao motor?

First of all - Welcome to the forum!

Now, for the answer: The 5mm shaft has it's advantages and disadvantages. The advantage is it's strength. The disadvantage is the pinion gear availability (difficult to get and expensive when you do get them). If you have an average weight truck and want to run on 12 cells, the 1/8" shaft will hold up fine. If you have a heavy truck and want to run 14+ cells, I recommend the 5mm shaft size. I personally run the 8L with an 1/8" shaft and haven't had any trouble, but I have seen a 9L with 14 cells snap a 1/8" shaft (the user tends to be hard on his vehicles as well). Basically, if you don't romp your truck, the 1/8" shaft holds up well, but I recommend the 5mm shaft for anything over 12 cells.

thanks

tends to be....
 

What do you mean " user tends to be hard on his vehicles " LMAO

LOL. You know what I mean! :)

there are other user hard on their vehicles as well ya know...LOL:L: :L:

:)

Does anyone know where to buy these 5mm pinion gears?

I have a few in stock. I have 14, 16, 18, and 20 tooth pinions made for these motors. They are $15 each. I haven't tried one myself yet, but a few customers have them. What tooth count are you looking for?

Quote "but I have seen a 9L with 14 cells snap a 1/8" shaft (the user tends to be hard on his vehicles as well). "

Looks like im gonna need to go with the 5mm shaft - whatcha tink mike??

Not a bad idea. A key to not snapping the shaft on a 1/8 shaft motor is placement of the pinion gear itself. If the pinion is out at the very end of the shaft, it is much more prone to breakage. The closer you can mount the motor to the spur gear, the better, as this keeps the pinion closer to the motor and eliminates this problem.

Well, I just bought a 1/8 shaft motor because I didn't know where to get 5 mm pinions so I don't need any 5 mm pinions right now.

I'll just put the 1/8 pinion as close to the motor as possible.

As long as you keep the pinion in close, you shouldn't have any trouble. The two broken shafts I have seen both had the pinions way out on the end of the shaft, which is asking for trouble. I don't have the pinions listed on the site yet. Some day I will have to get them there (with a buch of other stuff that I haven't had time to list).