Gearless four-point contact ball slewing bearing

The toothless four-point-contact ball slewing bearing is a specialized mechanical bearing with unique structural features, making it ideally suited for applications requiring high load capacity, unrestricted rotational freedom, and precise positioning.

Gearless four-point contact ball slewing bearing

Structural features

The gearless four-point-contact ball slewing bearing is a specialized mechanical bearing with distinctive structural features that make it well suited for applications requiring high load capacity, free rotational motion, and precise positioning. The following is a detailed description of the structural characteristics of the gearless four-point-contact ball slewing bearing:

Four-point contact design:

The four-point-contact ball slewing bearing derives its name from the arrangement of its balls. It features four contact points, evenly distributed between the inner and outer rings, forming an X‑like configuration. This four-point-contact design enables the bearing to simultaneously handle radial and axial loads without requiring additional support.

Toothless ring:

This is one of the key features of gearless four-point-contact ball slewing bearings. Unlike slewing bearings with a toothed ring, the gearless version lacks an external gear ring, eliminating the need for a gear‑rack mechanism. This design makes the bearing simpler and more compact, making it well suited for applications that require precise positioning but do not necessitate external drive.

Inner ring and outer ring:

Bearings typically consist of an inner ring and an outer ring, with the inner ring connected to the machinery and the outer ring attached to the base or supporting structure. The clearance between the inner and outer rings enables the bearing to rotate.

Rolling element:

Between the inner and outer rings, four contact points are fitted with rolling elements, typically balls. These balls support the load by rolling, thereby reducing friction and wear.

High load-bearing capacity:

The design of the gearless four-point-contact ball slewing bearing gives it a high load-carrying capacity, enabling it to support large and heavy loads. This makes it particularly well suited for applications such as cranes, rotary tables, and robotic arms that require substantial load-handling capabilities.

Positioning:

Thanks to its four-point contact design and ring‑less structure, this bearing delivers precise positioning and control, meeting stringent positioning requirements across a wide range of applications.

Continuous rotation:

Gearless four-point-contact ball slewing bearings typically allow continuous 360-degree rotation without the need for additional drive mechanisms. This makes them well suited for applications requiring omnidirectional rotation, such as photographic equipment and solar tracking systems.

Sealing device:

To protect the bearing interior from contaminants and moisture, some gearless four-point-contact ball slewing bearings are equipped with seals.

Product Specifications