I'm a non-engineer doing a little design project.
I'm going to be running some M5-ish (have some flexibility) setscrews into a shaft of about 6mm. There's no reason why the shaft can't be flatted off a bit so I'm presuming I'll do that.
There's no motors or electronics involved and the ends of the shafts are getting a pretty minor (I don't have numbers, sorry, I know I'll need them at some point and will need to do testing to get there) amount of force applied from a distance 20-30mm away. The setscrew connection must be highly resistant to slipping or loosening over extended (could be effectively permanent) use but also must be re-settable occasionally. When it does get reset, it could be right in the area of prior settings on the shaft, and it will have to be done with high accuracy (say down to a resolution of .02mm ideally), so I want to avoid marring as much as possible. (If this isn't possible then the whole thing will have to use a pinch bolt instead of a setscrew.) The shaft can be any material, within reason.
The part will have some exposure to vibration but I don't intuit that it will be more than blue loctite will protect against.
How do I do the math to determine what exact materials to use and the torque on the setscrew to avoid the screw loosening, slipping, or significantly marring the surface of the shaft?
Any recommendations for reading on the topic would be great.