Gear ring rope winches

Gear ring rope winches are used for high to extremely high rope pull forces, such as those that occur with heavy-duty crawler cranes, deep-sea winches and other specialist applications. Output torques of up to 2500 Nm are handled most economically by using a gear ring with several external slewing drives, which can be driven electrically or hydraulically. The redundancy of the slewing drives offers high operational safety for the rope winch. Damage resulting from overloading of the drive system can be prevented by optional system safety geometry patented by Liebherr.

Liebherr rope winches are always designed for the specific requirements. The types in the table below give an idea of the range of options. Output torques, ratios and dimensions are available in a wide range of additional arrangements and can be adjusted at any time.

ZSW 1400
Output torque [Nm]
830,000
Rope diameter [mm]
52
Drum diameter [mm]
1,300
Weight [kg]
26,500
The ZSW 1400 is in operation as a hoisting winch in the largest LR 13000 crawler crane ever manufactured by Liebherr.
ZSW 2400
Output torque [Nm]
5,600,000
Rope diameter [mm]
100
Drum diameter [mm]
3,000
Weight [kg]
180,000
This cable winch sprocket was developed especially for use offshore in deep-sea lifting applications.