Thread: How will I know when my bevel needs to be re-set?

A bevel? Normally never

unless if you honed on tape and have to re-set it without tape, but once that bevel is set, you'll never have to do it again

I wonder why you ask this question, if you have a truly shave ready razor (and don't damage the edge) all you need is a "finisher" or a "refresher", one of the higher grit hones.