"J. Clarke" wrote in
:

The welder isn't there to mend an accidentally broken blade, it's
there, generally with a cutter as well, to facilitate internal
cuts--you break the blade, pass it through a drilled hole in the
part, weld it, and then do the cut.

If you're a woodworker only you probably wouldn't have. That feature
is more common on metal-cutting bandsaws.

I don't think this is common at all now-a-days. There are
so many alternative ways to cut an interior hole now, that
using a bandsaw isn't the preferred way.

(not a metal worker, but my buddy is a serious machinest,
so I get some insight to that world. It can be really
useful having a machinest friend, incidently)

John