Quote:
Originally Posted by transmaster
One of the best things to cast these short of parts out of is defunct automotive carburetor bodies it is a zinc alloy and this what so many of these old pulleys where made of. The alloy used in carburetor bodies has a 350 degree lower melting point then aluminum, they cast to a fine finish requiring very little if any finish work. The problem, of course, it the cost of setting things up.
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The only thing you have to watch using aluminum and similar alloys is shrinkage. Although IIRC cast iron has the most shrinkage.