As much as I like these motors, for the life of me I just don't know why they are using a ''loose'' shaft and set screw instead of a ''pressed in''shaft and setcrew. On these motors, after a crash I the setscrew would come loose even if some threadlocking was use so decided to do something about it: Retaining compound !
Loctite 620 or Permatex 62041 (that is the one I'm using) will do the job.
Simply remove the retaining clip ans setscrew:
Disassemble the rotor from the stator:
Remove the shaft from the can, clean it with a degreasing solvent, also clean the hole of the can:
Apply some retaining compound one both the shaft and inside the can's hole:
Put back the shaft in the can in a turning motion and let it cure for 24 hours. Be sure to wipe off any excess of compound:
Once cured assemble back and re install the retaining clip and setscrew.
The setscrew problem/loose shaft in the can is now a thing of the past. After only 4 hours the product is hardened, tried to turn the shaft in the can with a big plier without any luck... on the packaging there is a note saying that you'll need to use a puller or a press to separate the bonded parts lol
Now go fly !!