Originally Posted by
dsbrantjr
Consider what will happen if you break the bolt off in the hole. You will have a steel screw stuck in a softer alloy hole; good luck drilling it out.
"I've never tapped before". That is pretty clear. Except for a deliberately designed press fit, "force it in" has no place in machine work.
Yes, the closest I've come to 'machine work' is drilling the brake caliper mounting hole a tiny bit wider in a steel fork.
But if something goes wrong I dremel through the eye of the crank to get it off. A lost crank still lost.