The question is too vague to get a specific answer. The question 'assumes' that all auger bits from all manufacturers are the same. They are often close but not close enough.
Got any specific sizes, name brands, or makers?
I do understand that different manufacturers would possibly be different dimensions. Mine happens to be a Delta 1/2 hp. Did you see them in the
grizzly catalog? I am having trouble locating them. Do you have a Grizzly part #? Thanks!