So you had to go and weld it, shame, shame, shame. There are still enough Blacksmiths around to do a proper repair, which personaly (not just being a Blacksmith) I would have gone for on an 1870ish restoration.
Anyhow, a bushing is basically a length of tube, being bronze it will wear out faster than the iron parts which it is rubbing on (this is termed a "sacraficial bushing") So when you check the clapper in ten years or so, you just knock out the worn bushing and replace it with a new one, with no structural damage to the steel parts.
I hope you will be singing one of the Cornish Bellringing songs on Friday.
Good Luck, JohnB