Large diameter bearings by ATH Technik

Crossed roller slewing bearings geared and ungeared

Crossed roller slewing rings are suitable for applications with high rigidity, high precision, and high load capacity requirements. Due to the X-shaped arrangement of the cylindrical rolling elements, axial forces, radial forces, and tilting moments can be accommodated in a compact bearing location.

up to 3m outer diameter Internally, externally, or non-toothed Optional corrosion protection Standard and custom production
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Crossed roller slewing bearing
Statements

Crossed roller bearings in three designs

Depending on the drive concept and installation space, we supply crossed roller slewing rings as ungeared, externally geared, or internally geared versions.

crossed roller slewing bearing ungeared
Crossed roller bearing

Untoothed

For applications where the rotational movement is implemented externally or without integrated gearing.

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crossed roller slewing bearing with external teeth
Crossed roller bearing

External teeth

For compact drive solutions with a pinion and external power transmission.

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Internal-tooth cross-roller rotary union
Crossed roller bearing

Internally toothed

For enclosed gearing in indoor areas and space-saving integration of the drive.

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Design of a crossed roller slewing bearing
Structure

Cylindrical rolling elements in X-arrangement

Crossed-roller rotary joints consist of an inner ring, an outer ring, spacers, and cylindrical rolling elements. The rollers are arranged in a crossed pattern, thereby providing high rigidity while maintaining a compact design.

Thanks to the double-sided sealing and regreasing capability, the bearings are designed for robust, long-lasting, and precise rotary movements.

Very high load capacities
High rigidity
Low friction torque
High rotational accuracy
Applications

For precise and heavy-duty rotary movements

Crossed roller slewing bearings are used wherever high loads, high rigidity, and precise guidance must be combined in a compact bearing location.

General Mechanical Engineering custom machinery manufacturing Lathes Drilling rigs Conveying systems Radar systems Medical technology Rail vehicles Solar technology Wind turbines Tunnel boring machines Crane systems
Technology & Design

Important criteria for selection

Load, accuracy, backlash class, preload, gearing, and bolting are decisive for sizing.

axial and radial forces

Due to the X arrangement, axial and radial forces can be absorbed in a compact bearing position.

Tipping moment

Crossed roller bearings are particularly suitable for applications with high tilting moments and high bearing rigidity.

Play & Preload

Versions with normal clearance, reduced clearance, or preload can be supplied.

Material

Inner and outer rings are made of hardened and tempered steel. Raceways and rollers are hardened. Optionally with black oxide finish

gearing

The toothing is not hardened by default, but can be made hardened for high requirements.

Tolerances

Tolerances, tilting clearance, concentricity, and axial runout are determined depending on the technical requirements.

Need to have a crossed roller slewing bearing custom-designed?

Send us your drawing, load data, installation space, or an existing sample. We will assist you in selecting the appropriate crossed roller slewing bearing or manufacture a custom design according to your specifications.

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