FORMULA SHEET - Homestead

D = large sheave diameter. d = small sheave diameter. New RPM (New CFM x Existing RPM) / (Existing CFM). Ex. (15,000 x 850) / (12000) = New RPM 1,063. New Pulley Diameter = (Existing Pulley Diameter X New Speed)/ (Divided) By (Existing Speed) Pulley Speed. You would like to run @ 900 RPM. You Have a 16 inch Pulley. Find Area of 16 inch Pulley ................
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