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A930Rocket, Looking at those pulleys likely the smallest on the motor and largest on the drill will give about 10:1 ratio, check what the motor speed is likely 1750rpm, if so that should get you to about 175RPM. Using a reamer with cutting oil on it approximate feed rate should take you about 15 seconds to get through your hub. You want to keep the tool cutting forward, or pull it out don't let it sit in the bore while rotating. A reamer should cut very close to size.
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