How far away from the timing chain is the harmonic balancer? I already broke one tool

[Hazieview]

Hey guys I went to install my harmonic balancer on my engine and I made a few mistakes.

First mistake.... I rented a harmanic balancer install tool from Autozone.

Second Mistake.... I actually used it.

Third Mistake.... IT SNAPPED!

The reason I laugh now is because I actually got it back out. I just pulled the harmonic balancer back off with a puller and then unscrewed the broken tool out of the crank.

So back to sqaure one. How far do I need to screw the harmonic balancer on? i was told that eventually it would just quit going on. Obviously I didn't notice because the nut was still turning and snap.

Would anyone recomend a better tool and maybe tell me how far it should go on before I break another tool?

I just need to know how far the balancer needs to be from the timing chain cover. Thanks guys!