Dan, U.S. Air Force, retired wrote:

I was
thinking of supporting the work with a steady rest leaving two pulleys
in position to be cut off, then moving the rest and repeating.

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That would work, assuming your chuck was accurate enough. My three-jaw
isn't that accurate (which is why I do a lot work between centers) and
setting up a long piece of bar-stock in the four-jaw can be a bit of a
bother. But I wouldn't be able to get as many slices since the steady
-rest would not allow me to work as close to the dog. (My steady-rest
is home-made and kinda big.) Plus, it would be a bit more work (at
least, for me).

The last time I made pulleys I spent about an hour to produce twenty
pulley-grooved 'slices' from a hunka 3" bar stock about 16" long.
After being sliced on the bandsaw the cartwheels went into a drawer, to
be drilled & faced as needed, often by one of the kids using a 'baby'
lathe.

-Bob