1high torque for low speed 2 good drill capacity 3 heavy ... character1. With rather high speed and reasonable speed range with a few steps, high torque for low speed, it is suitable for ... spindle:80mmRotate speed of spindle rotate speed of power head (r/min)1480(for core drill)Positive (low speed, r/min ... )80,148,212,308Positive (high speed, r/min)247,456,650, ...