070 part

[agg221]

I would advise cutting back to a clean shape and the brazing on a piece of alloy. This is because a) you then know it's clean, b) you will then have a thinner joint which is stronger, c) the filler rod is more expensive than the alloy so it will make it cheaper and d) the filler is softer than the alloy so won't hold the tapped thread as well.

 

Brazing will work fine, but given the state of that bottom bracket I suspect it won't hang on long itself. As such, if you do have access to someone with good TIG capabilities it would be worth considering getting both done at once. It can be welded with a high silicon filler, building up a series of overlays to replace the missing material. This is stronger than the braze alloy and makes a very effective (and very permanent) repair which can be ground right back externally and repainted so that it is invisible, with a smooth internal finish that is very hard to spot.

 

Alec

Edited March 8, 2014 by agg221

[elliott EGD]

Thanks for the advice bud opend up a few more options for me. Just need the spare time to get cracking