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Power, not torque
The Drill motors have much more power: .87 N*M/2 * 19670RPM/2 *2*PI/60 = 450 Watts
Chiaphua power = 500RPM/2 *2.2 N*m/2*2*PI/60 = 317 Watts
Hope this clears it up. In other words, if you gear the drill to the same output free speed of the Chiaphua, the drill will have more torque.
-Paul
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