Gear Train: Speed on the basis of Teeth Ratio
Prerequisite: Gear Trains
The first gear in the gear train, say gear A, is attached to the motor of 250 RPM (the shaft of the motor goes through the center of the gear). It has 20 teeth. The second gear in the gear train attached to gear A, say gear B, has 10 teeth and is attached to a wheel (with an axle through its center). How many times will the wheel rotate in a minute? In other words, what will be the RPM of the wheel?
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1 solution
Since gearB has half teeth as compared to gearA, it will rotate twice as fast as gearA. So, the wheel attached to gearB will also rotate twice as fast as gearA. Also, gearA will rotate at 259RPM (ie the speed at which the motor attached to it is rotating). So, gearB will rotate at 2*250= 500 RPM.