Attaching Pinion To Motor Shaft???

[JohnJ]

Trying to help a friend get a small heli working but having obtained a new ESKY Motor for his heli I'm stumped as to how you attach the small pinion to the drive shaft?

I've tried heating the pinion with a flame and in boiling water but I can't get it on the shaft no matter how hard I try!

Any ideas???

Thanks

John

[Nick B]

Green loctite should do it

[KnifeEdge]

Measure the shaft, and drill the centre of the pinion to the correct size. You could then green loctite it to stop it from coming off, or grind a small flat on it so the grub screw can locate onto it to avoid slipping.

[Nick B]

Oooops,didnt read the thread properly,shouldnt eat beef stew n dumplings while reading the forum


Knife edge is barking up the right tree

[JohnJ]

Thanks guys, I suppose I should explain this motor and drive shaft is very small unlike the bigger motors that have grub screws to secure the pinion!

I might have managed a sort of fix, I've used a Dremel to shorten the shaft a little and then gently eased the pinion on in a vice it's really tight so I dont think it will ever come off!

Ughh I hate this small stuff

[Neutrino]

Ughh I hate this small stuff

Big fingers??

[lankey]

That's a friction fit pinion my friend.... I started out on an Esky belt cp and those pinions were a PITA stupid design!!

You had to use a pinion puller to get them off- not sure if that worked in reverse though as I never owned one, just dremelled them off!

You could try sticking the motor in the freezer, then heating the pinion before you tap it on.... watch your hands though!

[Mart61]

The pinion on my 250 is secured with green threadlock. Hence I'd have gne with the drill it and loctite it suggestions.

Seems like you got it on tho eh?

[JohnJ]

Yes got the pinion on, it is a friction pinion as suggested above so requires brute force!

I still hate this small stuff

Been trying to sort out a little HBK2 for a friend who has been trying to learn to fly for quite some time, got him a new motor & esc from HK but having got it working this morning in the warehouse I have to say it's the most unstable / unflyable pice of junk I've ever seen!

Havent got the heart to tell him it a waste of money and effort

[lankey]

I have to say it's the most unstable / unflyable pice of junk I've ever seen!

Havent got the heart to tell him it a waste of money and effort

I hear ya

You've got to tell him.... I waisted a year with my belt cp and that was a bigger bird! Biggest regret in this hobby by far!