I have a motor with an 8mm shaft diameter. I'm trying to make my own hub for direct mount driving a wheel. What diameter hole size should I drill for the hub's shaft which couples with the motor shaft? Would these be the same standards as clearance hole drillings for screws? For example, an M3 screw has a suggested close fit drill size of 3.2mm and a normal fit drill size of 3.4mm. Should I drill an 8.2mm diameter then?