So for the hight strength shafts, you need to drill a hole in the shaft, what drill bit do I need and if I don’t have that drill bit, what can also work?
the thread size of the standard screw is 8/32, you can use that to help find the size of the thread if you wish to tap it after drilling. #29 drill bit
Take a dremel tool (if it’s aluminum, I’m not sure about steel) and start with a small sanding bit. Use it to wear away the edges (sanding in a circular motion) until the hole is big enough for a high strength shaft.
Step drills, like these: Titanium Coated Step Drill Bit, 1/8" to 1/2" - Tools for VEX Robotics - Robosource.net are really good for drilling out VEX holes. They are a bit safer than regular twist drills in that the don’t “grab” the metal so badly. Nevertheless, a good vise is a must on your workbench as well.
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Sorry, I read that question completely, wrong, 11/64, the same that you would use to drill a hole for a screw in a c-channel. I mean 5/32 theoretically could work, but then you’d have to slightly widen the hole through other methods, anything bigger and you might break the hs shaft.
A 5/16 drill bit will work for high strength shafts.
OP, just read read your post. Your title and post are confusing. Please clarify. Are you asking about drilling a hole in the c-channel for hs shaft as the title indicates. Or are are you asking about drilling a hole into a hs shaft to use with something the a standard #8-32 screw as you ask in the post?
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