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ComponentsSolutionsGearboxes and rope winchesSlewing drivesDAT 400 wind

The slewing drive DAT 400 wind is part of the Liebherr series-production for wind turbines. The gearbox size 400 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.

metricimperial

  • Reference output torque, dynamic - 38,200 Nm

  • Output torque Tmax - 78,600 Nm

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Reference output torque, dynamic
38,200 Nm
Output torque Tmax
78,600 Nm
Areas of application
Wind energy
Gear transmission ratios (yaw)
960.0 / 1,004.3 / 1,090.2 / 1,162.5 / 1,237.5 / 1,443.8
Gear transmission ratios (pitch)
116.4 / 132.1 / 154.2 / 165.6 / 175.0 / 185.7 / 198.0 / 212.5

Variants

TypeDesign 1Design 2
Diameter of centering seat (mm)365290 / 390
External diameter (mm)440480
Pitch circle diameter (mm)400440
Housing diameter (mm)380380
Number of bolts2432
Diameter of bolts (mm)22.022.0
Installation depth (mm)90305
Height of centering seat (mm)17.015.0 / 60.0
Gearbox height (mm)560375
Flange height (mm)13120
Number of teeth (output pinion)1412
Gear module of output pinion2018
Height of output pinion (mm)160183
Weight (three-stage model) (kg)465345
Diameter of output pinion (mm)340270

Components for Wind Turbines

Slewing Drives for Wind Turbines

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 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.

Contact

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.

Swivelling drives

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