How exactly does Shell Bell work?

Question

As Bulbapedia stands:

Whenever the Pokémon holding it deals damage, it restores 1/8 of the damage dealt as HP.

This means to me that every time I deal damage to an enemy my Pokemon recovers a bit of HP. But that's not true, because it seems that the Shell Bell doesn't work on OHKO moves neither on the last move that make the enemy faint.

Is this right? Please, let me know how it works, I can't figure out.

Answer 1

Ok, I've just realized that I was using Shell Bell on a Pokemon with Sheer Force. I've checked Bulbapedia again and found this:

If (and only if) a move is boosted by the effect of Sheer Force, it will no longer trigger item or Ability effects that activate after attacking. This includes the effects of Shell Bell.