Broken Motor Shaft!

[jdvuyk]

Anyone had this happen to them? Happened mid flight. Auto'd it down ok.
5.5 Stretched with 11T pinion. 1100kv second gen motor.
Motor isnt that old, just a few month. My old motor got smashed for years and its still fine.

It looks like the shaft can be removed (it has grub screws)
Anyone know how to get a shaft only? Dont need the can as its fine.

[aburkhardt]

Yup. Happened to me in the fall. It was a 4025 on my stretch Atom. I was able to land it ok. My motor was old, maybe your mess was too tight. Any strange wearing on the gears?

[aburkhardt]

Go to Harbor Freight and buy a 1 ton arbor press. It's cheaper than a new motor. Replace the bearings while your in there. I used a little green loctite on the shaft where it goes into the bell, this may be unnecessary.
I used a 20% off coupon.
http://m.harborfreight.com/1-ton-arb...not%20provided

[JaggedEdge]

Originally Posted by aburkhardt

Go to Harbor Freight and buy a 1 ton arbor press. It's cheaper than a new motor. Replace the bearings while your in there. I used a little green loctite on the shaft where it goes into the bell, this may be unnecessary.
I used a 20% off coupon.
http://m.harborfreight.com/1-ton-arb...not%20provided

Have the same one for small projects. Works fine.

[aburkhardt]

Might want to call ProStar and see if they carry that shaft. I was able to find a scorpion shaft that was "close enough". It's a little bit longer but no big deal.

[jdvuyk]

are you able to help a pilot out and let me know where you got the shaft? Doing the work isnt much the issue, finding a replacement shaft is!

[aburkhardt]

Mine is a 1-off motor. Unfortunately not the same. I measured the broken shaft for diameter and length then found a Scorpion replacement that was a tad longer than the one I broke.
You could probably use a 6 mm shaft, I think the 6HV pinions are 6mm.

http://www.experiencerc.com/store/sc...ft-p-8172.html

[aburkhardt]

So far, this is the best I could find.
http://www.prostarhobby.com/product-p/08-5016.htm
The shaft is 6mm, with a 5 mm output. I'll keep looking, but it might be the best option. Look at the bright side, you don't have to buy a $40 arbor press!

This motor kicks butt if you have an ESC big enough.
http://www.amain.com/scorpion-hkiii-...1100kv/p252376

But if you want crazy power you could drop this in. I have a 4025 in mine and it's bananas!
https://www.helifreak.com/showthread.php?t=682198

Sorry man, didn't know you were a Kiwi! Just realized you are a world away. Sucks, but I think you might just need to replace the bell/shaft combo.

Sent using Otto correct.

[aburkhardt]

I talked to Klaus at the Cincy Smackdown and he confirmed that you can not buy the motor shaft separately. He did however suggest getting ahold of a machine shop supply company and buy drill blanks in a diameter that is very similar to the the motor shaft. Maybe even buy a few different sizes to ensure a tight fit. It might be too late, but I thought of you when I was talking to the Compass guys. You might have to use a pinion from a 6HV or something, but it sure beats having to buy the entire motor bell.

http://www.mcmaster.com/#drill-blanks/=xanby3

http://m.globalindustrial.com/m/p/me...-metric-6-05mm

http://www.msdiscount.com/columnar.a...ssioncookieset

[Heikor]

Here's a motor suggestion. It has insane power and its designed for 600 helis, so strech atom has huge power reserve with this. I run it with HW 100a pro v3 and both motor and esc come down cool. The only thing you have to to is sanding down the shaft 1mm 6>5mm and you're set. I have a 10tooth pinion and 515 mm Rotortech blades and full 14° and full -14° is piece of cake with this motor.

http://www.e-fliterc.com/Products/De...dID=EFLM60600A