Motor run in
 

Hi, do new brushed motors need to be run in? If so, how & for how long?
Thanks
ric

i always do 5 mins at 4.8v

I never bothered, just stuck it in and ran it. If geared correctly the brushes shoulnt burn and will last for some time

As I have just got a new motor, 9x1,for a xx4, what gearing would be recomended for an indoor track?

Thanks!

there is some surgeted gearing in the manual i would say 18/19 but i dont own a xx4 so couldnt tell you

Unsure, as I stuck to a 10 double in 2wd and 4wd, but I would recommend starting off on the manufacturers ratio and try it. Trial and error to find the correct ratio but shouldnt be that hard to get the correct one.

I ran 14/84 using a 6 turn in my XX4-WE. I was running on concrete with Road Rage tires. I had a Trinitry 10x2 with a 16/84, but a lot depends on track setup.

i usually give the motor a couple of mins across 2 cells from a 7.2 saddle pack.

suprised nobody has mentioned wet-dipping as part of the running in process.

New brushes never match the exact curvature of the comm, so break-in is very important for max performance.

2-cells (~3v) run over top a fan is the best way to break in a motor (to keep it cool). If the brush hoods are well aligned, it should take less than 10 minutes. Periodically stop the break-in and check the faces of the both brushes. You only need run them in until the entire face of the brush is making contact with the comm. If the brushes are serrated, only run them in until all the serrations are touching the comm.

Water dipping is really only for silver can motors that have extraordinarily hard brushes. The water softens them allowing them seat fully in a very short period of time.