The pbd 40 bench drill is especially accurate and very easy to use thanks to its technical features with a 710 watt universal motor replacing the classical belt drive found in conventional bench drills this means that the speed can be variably adjusted using the rotary knob the troublesome task of retensioning the belt is now a thing of the past the pbd 40 is also equipped with two gears and a constant electronic control system that prevents the speed from dropping when drilling in hard mate