A lot of my ideas for the new competition use shaft collars to connect to plates, inspired by a passive lock I saw. I’ve read that the shaft collars use set screws with the same thread size (8-32) as the 393 motors but when I tried to replace them the screws just wiggle out or don’t screw all the way into the collar. What screws can I use to replace the given set screws?
Use the screws that fit the v5 motors.
you can use any 8-32 screw.
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The set screws have regular screw size thread, but fit the smaller drivers.
So to clarify, the 393 motor screws are NOT actually 8-32?
Yes. The 393 (and rack gear) screws (the gold ones) are 6-32
A really good replacement (that seems to hold up better than even the original set screws), are the shortest stand off connectors Vex offers. In my experience, I have never had one stripped. You can also use 1/8" 8-32 screws, but they take up more space.