The slewing bearing is a medium and large bearing with a special structure that can bear comprehensive loads such as large axial loads, radial loads and overturning moments at the same time.

In general, the slewing bearing itself has installation holes, lubricating oil holes and sealing devices, which can meet the different needs of various hosts working under various working conditions; on the other hand, the slewing bearing itself has a compact structure, guiding rotation It is convenient, easy to install and easy to maintain, and is widely used in medium and large slewing devices such as lifting and transportation machinery, metallurgical machinery, mining machinery, construction engineering machinery, port machinery and automated assembly lines.

According to different structural forms, slewing bearings can be divided into different structural forms such as four-point contact ball slewing bearings, double-row ball slewing bearings with different diameters, crossed cylindrical roller slewing bearings and three-row cylindrical roller combined slewing bearings; the above-mentioned types of bearings According to whether it has teeth and the distribution of teeth, it can be divided into different structures such as toothless type, external tooth type and internal tooth type.

According to different structural characteristics, the slewing bearing can meet the needs of the working host under various load conditions. Among them, the four-point contact ball slewing bearing has a higher dynamic load capacity, and the crossed cylindrical roller slewing bearing has a higher static load capacity. , and various loads are borne by different raceways and roller groups, so under the same stress conditions, the diameter of the bearing can be greatly reduced, so it has the characteristics of making the main machine more compact, and it is a turntable with high load capacity. bearings.

Code representation of slewing bearings

1. The composition of the code name

The bearing code is composed of the basic code and the post code.

2. The composition of the basic code

The basic code is divided into three parts, the front part is the structure type and transmission type code, the middle part is the rolling body diameter (for bearings with more than two rows of rolling bodies, it is the maximum rolling body diameter), and the rear part is the rolling body center circle diameter (for two The bearings with the above rolling elements are the diameter of the center circle of the largest rolling elements).