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

Just to know if all guys here make a flat spot with Dremel on motor shaft.

Is someoune here have ever had great result without a flatspot??

Maybe it's a stupid question, but i've order my Neu motor from RCM and i'am a litle scared about the fact of flat spot the shaft on a $300 motor:oh:

Thank you

Q is why you wouldn't want to make a flatspot? It doesn't have to be big, but if you don't have one its just relying on the setscrew being really tight into the motor shaft and never loosening a bit. With such a big motor, that's alot of power to trust to the little contact the set screw gets w/ the shaft.

Most motors have it already for good reason, but its not hard to do yourself, you really can't damage the motor unless you are doing somethign really really crazy

I've found that you really do need a flatspot. It doesn't need to be big. Just big enough for the set screw to rest on.

Ditto to the above responses...

Thank you guys. I'll make one one my new Neu motor:smile:

A flat spot on the motor shaft is absolutely essential. Anybody who is anybody will make a flat spot...

I guess that I am somebody, thanks ZPB. My self esteem has never been better!

Tsk, those arrogant Canadians! :wink:

The best way I have found to make a flatspot is to use a cutoff wheel with my dremel; I measure where I want the flatspot mark it with a marker put the motor in a bag and poke the shaft through so metal dust dont get into the motor. It is much easier to use the cutoff wheel than any of the dremel's grinding bits.

I used a tungsten carbide cutting/grinding bit. It slowly shaved the metal on my 1930's shaft - I thought it worked perfectly. Fast enough for me not to get impatient yet slow enough that I wouldn't be able to go too far too fast.

Psshhh, Those cheeky Americans! :na:

Whats "cheeky"? Please explain this insult?

I guess I'm a nobody, I don't use one and I have a Plett Big Maxximum, NEU 1515/1y,
NEU 1521/1y, and a Feago 8XL, all on cars running right now and never had a problem!

Cheesh, am I the only one with a sense of humor around here suddenly? :oh:

Lighten up guys! :party:

Seriously.... I don't know what "cheeky" means. Can you explain?

Great definition! Now what does impudent or insolent mean.

LOL

I thought you were being sarcastic there JHautz! :mdr:

You guys have never heard of cheeky? I guess it's more used in the UK... :sarcastic:

On some of my motors I have a flat spot on others I don't. Believe it or not I have had more problems with pinions loosening on the motors with flat spots. Also it is best to have the flat spot mostly where the set screw hits. That way if it does loosen the pinion doesn't come all the way off.

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.

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

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

My wife's mum is a brit, so I've gotten used to it. I once told a woman at work she was a "cheeky monkey" and I got quite a face back, hehe, we were always a bit flirty, but I had to explain I wasn't calling her a monkey. Now I just call my little boy a cheeky monkey when he's smirking at me as he's getting into something he's not supposed to.

I drilled my shaft. I only nicked it just enough so the very tip of the set screw goes down in and self centers in the hole. It works great as long as I don't have to change the position of my pinion gear because that would require a new hole.

http://img232.imageshack.us/img232/381/sany0721lo3.jpg

That looks great, just make sure that it is big enough for the set screw to sit in, then that would actually work the best.

I do mine just like nl12, its perfect.

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.

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

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.

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.

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..

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

a keyway and a set screw would work best.. but that's a real pain in the *ss to do... too much work..

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.

Yeah, that is a very good idea!

I've used the "dimple" method on my motors. If I took a photo you guys would laugh...it's a miracle the shaft hasn't broken given how deep I've drilled! Anyway for my next motor I want the flat spot. If any of you have the perfect method, post it, including any bit part numbers or whatnot. I'm happy to buy the right tool/bit.

Also, maybe as a value add, RC Monster could offer it for a fee with any new motor purchase - hint - hint...I'd certainly pay $10 extra to have it done right.