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Types of slewing bearings
Liebherr is one of the world's leading producers of slewing bearings. Our portfolio comprises many different types, manufactured in a wide range of dimensions and designs.
All of our slewing bearings can be manufactured with internal gears, external gears or without gearing. Special gearing, such as helical and worm gears, are also available upon request. The seal concept is also configured for each individual case of use, and takes account of particular environmental conditions, such as particularly saline or dusty air. The bearings can also be coated for extra corrosion protection.
Tapered roller bearings
Tapered roller bearings can be subjected to radial and axial loads. They are suited to high load conditions. The tapered form of the rolling elements ensures optimum rolling characteristics. The play-free bearing mounting makes the tapered roller bearing particularly suitable for the highest precision and accuracy requirements
Technical information
Table is scrollable
| External diameter | 800 - 9,500 mm |
| Average tapered roller diameter | 40 - 110 mm |
| Gearing | with external gears / with internal gears / without gearing special gearing upon request |
| Gear module | 8 - 50 mm |
Tapered roller bearings with no gearing
Optimum rolling characteristics and ideal power distribution are guaranteed by the layout and design of the tapered rollers. This design is used, for example, as the main bearing in wind turbines or in tunnel boring machines.
Single-row tapered roller bearing
The single row tapered roller bearings are mainly used for the main bearing arrangement in wind turbines. Optimum rolling characteristics and ideal force distribution are ensured by the layout and design of the tapered roller bearing.
Roller bearing slewing rings
Liebherr roller bearings are suitable for medium to high loads. They are designed as standard in triple-row configurations with two axial and one radial roller raceway. Depending on the case of use, other designs and variants are however also available.
Standard series
In addition to customised projects, our portfolio contains a comprehensive standard programme of one-piece Liebherr roller bearing slewing rings.
Technical information
Table is scrollable
| External diameter | 800 - 9,500 mm |
| Rolling element diameter | 12 - 140 mm |
| Gearing | with external gears / with internal gears / without gearing special gearing upon request |
| Gear module | 8 - 50 mm |
Triple-row roller bearings
In heavy machines, such as mining excavators, roller bearing slewing rings tend to be used mainly on account of the high loads.
Triple-row roller bearings for tunnel boring machines
Roller bearing slewing rings for tunnel boring machines are fitted with a preloaded retaining raceway. The cup springs for preloading the raceway ensure that the rolling elements never lose contact with the raceway, thereby guaranteeing optimised wear characteristics.
Triple-row roller bearings with special seals
Triple-row roller bearing slewing rings can be fitted according to need with specially-developed seal systems. These can protect the bearing in thrusters, for example, against the penetration of seawater while at the same time preventing the leakage of lubricants.
Cross roller bearings
On account of their play-free mounting, cross roller bearings offer greater precision than traditional roller bearings. They are used above all in tunnel boring machines and in conveyor technology.
Roller bearings with bolt connection
Bearing designs with bolt connections are used when in the presence of a special adjacent construction. This is often the case with cranes.
Roller bearings with bayonet joint
Bearing designs with bayonet joints are used in the presence of a special adjacent construction. This is often the case with cranes.
Ball bearing slewing rings
Ball bearings are particularly suitable for applications exerting low to medium loads on the bearings. Usually, polymer spacers are installed between the rolling elements, although bearing designs with steel or brass cages are also available.
Standard series
In addition to customised projects, our portfolio contains a comprehensive standard programme of one-piece Liebherr ball bearing slewing rings.
Technical information
Table is scrollable
| External diameter | 800 - 9,500 mm |
| Average tapered roller diameter | 20 - 90 mm |
| Gearing | with external gears / with internal gears / without gearing special gearing upon request |
| Gear module | 8 - 50 mm |
Single-row four-point bearings
Single-row four-point bearings are used, for example, for the slewing of excavators, the boom movement of tower cranes and as drive elements for large rope winches.
Single-row four-point bearings with special seals
Special forms of seals are always used whenever bearings are exposed to particularly harsh environmental conditions, and protect the slewing bearing, for example, from seawater penetration.
Double-row four-point bearings
Double-row four-point bearings can support significantly higher loads than single-row four-point bearings, for an equivalent diameter. They are used in applications with high loads and restricted installation space, such as for rotor blade adjustments on wind turbines.
Double-row ball bearings
Double-row ball bearing slewing rings are distinguished by their high cost-effectiveness and their robust design. They are used, for example, in crane technology.
Combined roller and ball bearing slewing rings
Combined roller and ball bearings are designed as standard with a roller raceway (supporting raceway) and a ball raceway (retaining raceway). This makes this type of design particularly suitable for high axial loads and harsh environmental conditions.
Standard series
In addition to customised projects, our portfolio contains a comprehensive standard programme of one-piece Liebherr combined roller and ball bearings.
Combined roller and ball bearings from the standard programme
Technical information
Table is scrollable
| External diameter | 800 - 9,500 mm |
| Average tapered roller diameter | 16 - 100mm |
| Gearing | with external gears / with internal gears / without gearing special gearing upon request |
| Gear module | 8 - 50 mm |
Combined roller and ball bearing slewing rings
The combination of roller and ball bearing offers a cost-effective alternative to traditional roller bearing slewing rings. This bearing type is mainly designed for axial loads, and is frequently used in conveyor technology, for example with bucket excavators.
Gear rings
Liebherr also manufactures gear rings, used for example in rope winch drives or for the yaw adjustment of wind turbines. The gear rings can also be configured in segments according to customer requirements.
Technical information
Table is scrollable
| External diameter | 800 - 9,500 mm |
| Gearing | with external gears / with internal gears / without gearing special gearing upon request |
| Gear module | 8 - 50 mm |
| Weight | 25 - 25,000 kg |
Gear rings
Liebherr has developed its own gear cutting machines for the milling of the gear rings. These ensure the best possible gearing results and guarantee optimum precision.
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