When building a quadcopter, it’s inevitable that we come across aluminium bolts and screws. Here I will share some of the methods to remove stripped aluminium screws.
Aluminium hardware is light weight but also easy to strip when apply too much torque or over tightening them.
It’s especially so when it comes to motor screws, as we normally use Loctite glue on the screw threads, and it takes additional torque to loosen them. I should have used Stainless Steel Socket screws in this case, but to save weight I chose aluminium hex screws and one of them stripped when I try to untighten it.
So I asked for help in my FB group and got some ideas how to remove it. People were super helpful and there were many suggestions. Idea 1 worked great for me but in case it doesn’t for you, you can try some other 5 methods.
Cut a flat notch on the screw head either using a Dremel tool or a small hand saw. Then use a flathead screwdriver to remove.
I didn’t have a dremel, so I used a old table meat knife and a file, to make a nice straight cut big enough for the flathead screwdriver.
Grab one end of the screw head with a good pair of pliers and turn (picture by Stefan van der Ende)
If only one of the screws is stripped, you can try removing all other screws first, then twist the motor out, it should work even with loctite.
Remove the other screws, desolder the motor from the ESC now instead of trying to rotate the screw with your screwdriver, hold the stripped screw with you thumb and rotate the motor instead of the screw this time.
Hammer a torx bit into it and undo gently.
Completely drill off the head of the screw with a drill bit that matches the thread diameter. When the head of the screw comes off, you can remove the motor and take the threaded portion out with a pair of pliers. (heat it up fairly well to help loosen the thread lock)
Be sure to bag the motor up and leave only a small gap for the screw head, metal filings in motors is a real pain.
Take a wide rubber band, and put it in between the tool and the screw then presto.