William Wixon wrote:

hi, wondering if anyone can direct me to sources of "large" diameter v belt
pulley sheaves.
so far i've tried surpluscenter.com, mcmaster.com, grainger.com.
surpluscenter has good prices but the outside-diameter-width is too wide.
grainger is pretty expensive but they don't have the outside diameter i was
hoping to get (15"). mcmaster, sadly, doesn't have what i was hoping to get
at all.

Do you want sheaves or pulleys?
The sheave is what the belt runs in, the pulley is the entity.
Could you possibly be looking for a single sheave pulley?

Tom