What is single row crossed roller slewing bearing

The single row crossed roller slewing bearings are arranged at right angles to each other at intervals between the inner and outer wheels. They can withstand loads from all directions (such as axial, thrust or momentum loads). Since the roller is in linear contact with the surface of the track, the bearing is less likely to be elastically deformed by the load. The single row crossed roller slewing bearing can be assembled in all directions of the spindle for easy use. It can withstand radial and axial loads at the same time, thus simplifying the structure of the device and reducing the weight of the mechanism.

List of content for this article：

• Definition

• Application

• Usage

Definition of single row crossed roller slewing bearing

It is a special type of bearing with inner ring splitting and outer ring rotation. Since the divided inner ring or outer ring is fixed to the cross roller collar after being loaded into the roller and the spacer, to prevent separation from each other, the operation is simple when the cross roller collar is installed. Since the rollers are arranged in a cross arrangement, only one set of crossed roller collars can withstand loads in all directions, and the rigidity is increased by 3 to 4 times compared with the conventional model. At the same time, since the inner ring or the outer ring of the crossed roller bearing has a two-divided structure, the bearing clearance can be adjusted, and even if a preload is applied, a high-precision rotational motion can be obtained. Moreover, due to its special structure, it is commonly used as a joint bearing in industrial robots.

Application of it

Their rollers are arranged at right angles to each other at intervals between the inner and outer wheels. They can withstand loads from all directions (such as axial, thrust or momentum loads). The roller is in linear contact with the track surface. Therefore, the bearing is less likely to be elastically deformed by the load. This type of bearing is widely used in industrial robots, work machines and medical facilities, where high rigidity, tightness and high speed are required to ensure accuracy.

In the cross-roller bearing, since the cylindrical rollers are vertically aligned with each other by the spacer, one cross roller bearing can withstand loads in all directions such as radial load, axial load, and moment load. The size of the inner and outer rings is minimized, and the extremely thin type is a small size close to the limit and has high rigidity, so it is most suitable for the joint portion or the rotating portion of the industrial robot, the rotary table of the machining center, Uses such as robot rotating parts, precision rotary tables, medical equipment, gauges, IC manufacturing equipment, etc.

Usage of single row crossed roller slewing bearing 

Because of the divided inner or outer ring, are attached to the roller and spacer after the roller and spacer are installed to prevent separation from each other, so when installing the cross roller collar simple. Since the rollers are arranged in a cross arrangement, only one set of crossed roller collars can withstand loads in all directions, and the rigidity is increased by 3 to 4 times compared with the conventional model. At the same time, since the inner ring or the outer ring of the crossed roller bearing has a two-divided structure, the bearing clearance can be adjusted, and even if a preload is applied, a high-precision rotational motion can be obtained.

Use characteristics:

1.  Excellent rotation accuracy

2.  Simplified operation and installation

3.  Withstand large axial and radial loads

4.  Significant savings in installation space

5.  High speed capability

6.  Reduce shaft length and machining cost, thermal expansion leads to limited variation in geometry

7.  Nylon separator, low moment of inertia, low starting torque, easy to control angular division

8.  Optimize the pre-tightening force, the rigidity is high, and the guiding roller has high running precision.

9.  Carburized steel provides excellent impact resistance and surface abrasion resistance

10.  Simple but fully lubricated

Single row crossed roller slewing bearings have excellent rotation accuracy; it is easy to install; able to withstand large axial and radial loads; significantly saves space for installation space; nylon separator, low moment of inertia, low starting torque, easy to control angular division; optimize the pre-tightening force, the rigidity is high, and the guiding roller has high running precision; carburized steel provides excellent impact resistance and surface abrasion resistance; simple but fully lubricated.