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Originally Posted by spiffyspleen
What ratio do the Andy Mark gear boxes come in? We have several assembled from last year so would we actually have to change them?
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They are 12.75:1
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Also, I am new to mechanical and am not too familiar with gearboxes. What does 12.75:1 actually mean?
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It means that for every 12.75 turns of the motor shaft, the gearbox output shaft turns once. You are trading speed for torque.