. My furnace motor went the other day but the motor still turns under heavy load its not good but a furnace fan drum is way heavier than a buffer or papper wheel for sharpening. I would like to know on the motor you place a small pulley and on the other pulley what size of pulley. pulley size is my concern and how does it work the motor i have is a 1/3 110v 1740rpm single speed can some one show me pic s up close so i can copy to build a duel paper sharpener . thanks kellyw ps ITS -47 BELOW AND I DONT GIVE A F__