Who's of you make flat spot on motor shaft??

[JB3231]

I had to add a flat spot on my LST2 conversion. It would just heat up and start slipping after about 30seconds into the first run.

Took me awhile to figure out what it was.

[mkrusedc]

I guess I was a nobody, but i want to be a somebody

I have bashed my Neu 1515 hard so far with no loosening, but I think I am pressing my luck.

I do mine just like nl12, its perfect.

[MTBikerTim]

I don't know if it would work on this size motor but I use a locktite for pinions on my 1/18 motors. Would that work on these? I just hit the pinion quickly with a heat gun and it pops right off.

[squeeforever]

From what I've heard it will, but it takes alot of Loctite and its hard to get off.

[MTBikerTim]

Even with a heat gun? I was stunned at how easy the 1/18 ones pop off with the heat gun. You won't get them off in the field though if you damage it.

[aqwut]

I find it impossible to run without a flatspot... before I make mine.. I tape up the whole motor, and put the shaft on a vice... and I use a metal file.. seems to make a nicer flat spot that a grinder/dremel....

[MTBikerTim]

Originally Posted by aqwut

I find it impossible to run without a flatspot... before I make mine.. I tape up the whole motor, and put the shaft on a vice... and I use a metal file.. seems to make a nicer flat spot that a grinder/dremel....

That would almost be called manual labor. blasphemy.

A flat spot is a must no matter what. dont give it a second thought.

Is it better to make a flat spot on almost the whole motor shaft (like the motors that already have one) Or just a little spot?

Thats easy, the whole shaft. You never know when your gonna have to put a pinion on backwards or if its a fat one or skinny one, the set screw could wind up any where.

i agree its best to flat the whole shaft otherwise you will create a weak point in the shaft that would take most of the deflection under high lateral loads.

[Serum]

I'll shoot a pic of my flat spot later this day..

I use a dremel and a grinding stone.. Works like a charm. I try to make them a bit hollow..

[Finnster]

I make a flat spot for most of the shaft, but I leave the end bigger, just in case the setscrew gets loose. That way the pinion can't go flying off

[zeropointbug]

Originally Posted by Finnster

I make a flat spot for most of the shaft, but I leave the end bigger, just in case the setscrew gets loose. That way the pinion can't go flying off

That's a pretty darn good idea Finnster! I know I recently had a pinion fly off on me... didn't wait long enough for lock tight to harden and/or I didn't tighten th set screw enough.