DAT 350 wind Slewing drive

The slewing drive DAT 350 wind is part of the Liebherr series-production for wind turbines. The gearbox size 350 can be designed with a short output shaft (design 1) or long output shaft (design 2) and is suitable for use as yaw and pitch gearbox.
Reference output torque, dynamic 21,000 Nm
Output torque Tmax 49,500 Nm

Reference output torque, dynamic 21,000 Nm
Output torque Tmax 49,500 Nm
Areas of application Wind energy
Gear transmission ratios (yaw) 1,004.3 / 1,090.2 / 1,237.5 / 1,443.8 / 11,625 / 960.0
Gear transmission ratios (pitch) 116.4 / 132.1 / 154.2 / 165.6 / 175.0 / 185.7 / 198.0 / 212.5
Type Design 1 Design 2
Diameter of centering seat [mm] 340 268 / 270
External diameter [mm] 405 450
Pitch circle diameter [mm] 375 410
Housing diameter [mm] 340 340
Number of bolts 24 18
Diameter of bolts [mm] 17.5 17.5
Installation depth [mm] 90 160
Height of centering seat [mm] 10.0 17.0 / 64.0
Gearbox height [mm] 500 420
Flange height [mm] 25 30
Number of teeth (output pinion) 11 14
Gear module of output pinion 16 13
Height of output pinion [mm] 115 135
Weight (three-stage model) [kg] 235 240
Diameter of output pinion [mm] 220 225
Yaw systems

Yaw systems

Yaw gearboxes, so called wind tracking mechanisms, adjust the nacelle to the particular wind direction. In order to transmit the required high adjustment forces, the use of several slewing drives is recommended.

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


Please contact us - we will answer your questions and put together an individual offer for you. If you need a component as a spare part for your Liebherr machine, please contact your local service partner.


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