DAT 250 wind Slewing drive

The slewing drive DAT 250 wind is part of the Liebherr series-production for wind turbines. The gearbox size 250 can be designed with a short output shaft (design 1) or long output shaft (design 2) and is suitable for use as a pitch gearbox.
Reference output torque, dynamic 8,500 Nm
Output torque Tmax 21,900 Nm

Reference output torque, dynamic 8,500 Nm
Output torque Tmax 21,900 Nm
Areas of application Wind energy
Gear transmission ratios (pitch) 105.5 / 120.9 / 127.4 / 132.6 / 150.3 / 164.9 / 188.7 / 194.8
Type Design 1 Design 2
Diameter of centering seat [mm] 220 190 / 210
External diameter [mm] 280 270
Pitch circle diameter [mm] 250 245
Number of bolts 12 12
Diameter of bolts [mm] 17.5 14.0
Installation depth [mm] 68 185
Height of centering seat [mm] 20.0 15.0 / 45.0
Gearbox height [mm] 400 325
Flange height [mm] 25 113
Number of teeth (output pinion) 15 14
Gear module of output pinion 12 10
Height of output pinion [mm] 110 105
Weight (three-stage model) [kg] 115 110
Diameter of output pinion [mm] 215 170
Pitch systems

Pitch systems

Pitch gearboxes control the angles of attack of the rotor blades and adapt them to the variable wind speeds. For highest accuracy at rotor blade positioning, Liebherr offers slewing drives with reduced play upon request.

Slewing bearings

For over 70 years Liebherr has been manufacturing top-quality large diameter slewing bearings. Depending on requirements, various dimensions are available. Product portfolio Large diameter bearings



In the download area you find an overview of all brochures and datasheets for the various Liebherr components. Downloads

Swivelling drives

Liebherr develops special swivelling drives for applications which are exposed to high dynamic loading during the rotating movement (e.g. excavator). Swivelling drives