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Once all of the individual weights had been accounted for and the bob weights added, Consolo spun the crankshaft on the balance machine. The machine spins the crank at about 450-500 rpm for 15-30 seconds depending on how out of balance the crankshaft is. When the spinning is over, the computer records and reports how much weight to remove or add to the crankshaft and where. In our case, we didn't have to remove any weight whatsoever.