straight air screwdriver / with shut-off clutch
D 3571 series
with shut-off clutch
Max.: 7,500 rpm (47,123.9 rad.min-1)
Min.: 3,000 rpm (18,849.6 rad.min-1)
Max.: 120 Nm (88.51 ft.lb)
Min.: 4 Nm (2.95 ft.lb)
This screwdriver comes with a low-vibration impulse and allows the fast tightening of fasteners without any tangible torque reaction. The pistolgrip or inline designs available allow fatigue-free operation, despite the torque output that is higher than with other models. The tool comes with a similar design to that of an impact driver, but with integrated hydraulic impulse unit.
The output of the torque is controlled by both the frequency and pulse unit adjustment, while the preset pressure in the pulse unit is reached at the same time when the driver shuts off. The shut-off system transpires prior to achieving the theoretical maximum torque, which results in no hammer effects. Finally, both pressure and frequency are regulated, which allows a torque accuracy of 5%.