Helicoil for brake caliper retaining bolt hole?

[AyJay]

There is no torque being applied on the helicoil. When you put on the brake the caliper is putting a shear force on the mounting bolt at 90 degrees to the bolts long axis, there are no braking forces going through the helicoil at all.
All the helicoil is doing is putting up with the twisting forces you put on the bolt when doing it up -and that's it. Braking doesn't come into - it if you are talking about the 'strength' of the helicoil. Helicoils are usually well up to the job in most situations if properly inserted.
Having said that -I'd fit a new caliper because it's less messing about -not because helicoils are not up to it.

You're right about it being a shear force (my mistake, it was late), I understand the calliper is trying to rotate with the disk putting 90 degree forces on the mounting bolts as you say. What I don't understand is where you say there are no braking forces going through it. Er, then what is that 90 degree shear force then? How does that not put force through at least some of the thread? Or am I wrong? It's been known to happen.

And are there not always sideways forces when you apply the brakes which will push and pull the calliper from side to side? The pistons push onto the disk in the same plane and unless you have perfectly equal pressure from both sides of the calliper, that is applying force in the same plane as the bolt.

As I said earlier, I have read that helicoils can be stronger, but first, how on earth were the threads stripped in the first place and secondly, if it was user error (no torque wrench perhaps), then jeezuz, what makes the user think that he can correctly fit a helicoil? That's why I said 'ask a pro'.