12mm
10 mm would be ideal. But 13/32" will work.
A 10 cm hole is almost 4 inches ! ! - IF you meant 10mm, then that's a little over 3/8 of an inch, or 13/32 for a clearance hole.
3937 is 3937/10000. If you are converting a 10 mm whole to a fractional drill bit size you have two choices. 25/65 is a bit small or 13/32 is a bit big. If it is not a super precision part, use 13/32.
attach a 10mm socket to an electric drill and place it onto the flywheel nut. start drill while giving it a bit of throttle and it should start up.
To put a drill bit in a drill, you typically loosen the chuck, insert the drill bit into the chuck, and then tighten the chuck securely to hold the drill bit in place.
metal drill bit has a finer point
A titanium or cobalt drill bit.
A chuck key is used to remove a drill bit from a drill.
The best type of drill bit for plexiglass is a carbide-tipped drill bit.
A 15/64 drill bit is slightly smaller than a 1/4 drill bit.
You can acquire a drill bit for your drill by purchasing one at a hardware store or online. Make sure to choose a drill bit that is compatible with your drill's chuck size and the material you will be drilling into.
One that's too big for you to hold.