hello...

i have some 27turn motors ... they was runnin good for awhile .. 4200 bats and just a durtraxx truck .. on dirt foam tires... 78 by 27 on a 260 tranny ...

nwo the only thing that changed was i cut the coms ... they was a bit rough but not real real bad ...

now the wireing in on the arm over heats n smokes n poof motor toasted ...

any ideas ???

did you clean between the com sections after cutting?

hello...

i have some 27turn motors ... they was runnin good for awhile .. 4200 bats and just a durtraxx truck .. on dirt foam tires... 78 by 27 on a 260 tranny ...

nwo the only thing that changed was i cut the coms ... they was a bit rough but not real real bad ...

now the wireing in on the arm over heats n smokes n poof motor toasted ...

any ideas ???

Yep, go to the hobby shop and get you another motor. Rebuilding or blueprinting an electric motor is not a rocket science, however placing a arm in a lathe and cutting off material from the com, you need to know what you are doing! If a motor is done right it will return the power that was lost and you know what will happen if it's done wrong. It will let out all that wonderful smoke that keeps motor running so good.

Any ideas, nope I was not standing deside you to see what went on! Sorry!
Another dead motor:drunk::drunk::drunk:

When you cut the comm, did you put new brushes on and break the motor in before taking it out and running it full out? Occasionally, the brush springs need replaced as well. Hard to give any real good suggestions without knowing more details about what you did.

He probally cut to much of the com took the cooper off to the bone

ok found out reason .. com cut was fine ... what happin was this .. used brushes already in motor .. will they had the lil ears off the ends to much brush on com and 2 com spots hit sametime n toast ... over heats wire more or less shorts it .. found out the fix cut the brushs in a sort of flat V where the v is pointing away form the com .. or more or less cut the ears off it lol darn ears lol works awsome now ... but thanks for the ideas n so on ..


and mike sort of rite sort of wrong u is lol ... the com was cut fine but like i said up there lol live n learn wasnt a big $ motor so not a big lose ... learn on old cook the new ooo yeahhhhhh smoke is awsome lol headin into turn 3 n smokin blowin a rod thur the block gotta love it lol

Phil-
I always use new/re-serrated brushes when I cut the com. Cheap insurance!

If the comm needed to be cut, chances are the lubricant in the brushes was gone and they needed to be replaced. New comm cut and dried out brushes equal short to comm. Also as previous stated you need to break in new brushes to make them contour to the new comm cut. Break in a low voltage with a fan on the motor shaft and watch the temp closely.