Source:  Vac Aero International, Inc.

We look now at the third of the seven important criteria that should be followed in order to insure good brazing, namely, the importance of good gap clearance (joint fit-up). We’ll see how reasonably tight joint clearances can significantly improve overall joint quality, whereas poor fit-up often yields poor brazing results (which could then hurt the reputation of the company doing the brazing.)

Read More: Essential Criteria for Brazing:  Proper Joint Fit-up by Dan Kay