Where can I find a 12" diameter pulley for a 3/8" shaft to motorize my grain mill?
You may have to buy a 12" sheave sized for a 1/2" shaft. It's somewhat unusual to have a sheave that large running on a shaft that small. The easy to solution is to buy a bushing to reduce the hole size to 3/8". McMaster-Carr will have them and probably W.W. Grainger as well.
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