The difference between Single Row Ball Slewing Bearing, Double Row Ball Slewing Bearing and Three Row Roller Slewing Bearing

Slewing bearing are divided into many different types, such as four point contact ball, cross roller, double row ball, double row ball, three row roller, steel wire raceway slewing bearing, etc. Each type has different characteristics according to its design and structure, which makes it suitable for specific applications. What is the difference between single row ball, double row ball and three row roller slewing bearing?

1.Single row ball slewing bearing 

2.Double row ball slewing bearing 

3.Three row roller slewing bearing

1.Single row ball slewing bearing            

Single row four point contact ball slewing bearing: composed of two seat rings, compact structure, light weight, steel ball and arc raceway four point contact, can bear axial force, radial force and overturning moment at the same time. Rotary conveyor, welding operator, small and medium cranes and excavators can be selected.            

Single row cross roller slewing bearing: composed of two seat rings, compact structure, light weight, high manufacturing accuracy, small assembly clearance, high requirements for installation accuracy. The roller is 1:1 cross arranged, which can bear axial force, overturning moment and large radial force at the same time. It is widely used in lifting and transportation, engineering machinery and military products      

2.Double row ball slewing bearing            

The structure of double row spherical slewing bearing is basically the same as that of single row four point contact spherical slewing bearing, but the difference is that the slewing bearing has two rows of rolling elements. It can bear large axial load and radial load overturning moment at the same time. It can be used with various cranes, excavators and other mechanical equipment.

The double volleyball type slewing bearing has three seat rings. The steel ball and isolation block can be directly discharged into the upper and lower raceways. According to the stress condition, two rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient. The bearing angles of the upper and lower arc raceways are 90 ° and can bear large axial force and overturning moment. When the radial force is greater than 0.1 times of the axial force, the raceway must be specially designed. The axial and radial dimensions of double row spherical slewing bearing with different diameters are relatively large and the structure is tight. It is especially suitable for tower crane, truck crane and other loading and unloading machinery with medium or above diameter.

3.Three row roller slewing bearing            

Three row roller type slewing bearing has three seat rings. The upper and lower raceways and radial raceways are separated respectively, so that the load of each row of rollers can be determined accurately. It can bear all kinds of loads at the same time. It is one of the four products with the largest bearing capacity. The shaft and radial dimensions are large and the structure is firm. It is especially suitable for heavy machinery requiring larger diameter, such as bucket wheel excavator, wheel crane, marine crane, port crane, steel water transport turntable and large tonnage truck crane.

Slewing bearing is widely used in industry. It is called "the joint of machine". It is an important transmission part of machinery which needs to make relative rotary motion between two objects and bear axial force, radial force and overturning moment at the same time. It has been widely used in machinery and other industries. If you have relevant purchase requirements, please contact Xuzhou Wanda slewing bearing Co., Ltd. to produce 30000 sets of slewing bearing with track center distance of 200-4000mm every year, and provide services according to your requirements