I made an electric skateboard (it works great, goes about 25mph) and the motor takes 4 screws to mount it. Motor is mounted to a 1/4 piece of aluminum. The screws go right into the motor and don't come out the other side so bolts are not possible. Over time that crazy vibration (from the road and pebbles and little potholes, from the motor itself being pretty powerful) being makes the screws come loose. Usually happens in less than an hour.
I've tried the strongest loctite but nothing seems to hold the screws in place. The loctite lasts a little longer but still they come loose. I have a Ryobi drill that I tightened it with. Maybe I am using the loctite wrong. I am very new to building stuff that is meant to be used in a more extreme way. In a way where lots of vibration is happening and things are moving very fast. And where you life may depend on it. Plus if loctite is so permanent than how would I be able to fix it if things went wrong? And if I use a less permanent loctite then would it even stay for this type of vibration?
I am well aware that building something this crazy is a good way to get hurt, but I really enjoy learning. I would love to learn how to make something that lasts for years and doesn't come loose. Something that is "skookum".
How do you tighten screws to aluminum that will vibrate a lot and get them to not rattle loose over time.
Motor is here. See BLDC-108.
Here is a diagram of the motor. It does not have the sliding brackets as pictured. It came without those, for some reason.