Four types of slewing bearing

Slewing bearings are widely used in marine equipment, engineering machinery, light industrial machinery, metal machinery and other fields. Operating machinery, medical machinery, industrial machinery and other industries. This article briefly introduces its four types, allowing you to understand it more intuitively.

Directory：

• What is slewing bearing

• single row ball slewing bearing VS single row crossed roller slewing bearing

• double row ball slewing bearing VS three row roller slewing bearing

What is slewing bearing

The slewing bearing is also called a slewing bearing, and some people also call it a rotary support and a swing support. It is widely used in the real industry. It is called “the joint of the machine”, which is a mechanical device that needs to perform relative rotary motion between two objects, and also needs to bear axial force, radial force and tilting moment. Important transmission components required. With the rapid development of the machinery industry, they have been widely used in marine equipment, engineering machinery, light industrial machinery, metallurgical machinery, medical machinery, industrial machinery and other industries.

single row ball slewing bearing VS single row crossed roller slewing bearing

The single volleyball slewing bearing is a four-point contact bearing, which has only one row of steel balls. They can withstand axial loads, radial loads and tilting moments. The single-row four-point contact ball slewing ring consists of two seat ringes, which are compact and lightweight, and the four points are in contact with the steel ball in the circular raceway. There are three types of single-row four-point contact ball slewing bearings: gearless bearings (without teeth), external gear bearings (external teeth) and internal gear bearings (internal teeth). Single row ball bearing rings are the most widely used basic type in different fields. The materials for single row ball bearings are mainly 50 Mn, 42 CrMo and C45.They are used in many applications: rotary conveyors, welding robots, light and medium cranes (truck cranes, deck cranes, aerial platforms, etc.) and different excavators.

The single row cross roller bearing consists of two seat ring rings, compact and lightweight, this single row cross roller type. Slewing bearings have steel drums as rolling elements rather than steel balls. Due to the 1:1 cross-arrangement of the rolls, it is suitable for high-precision installation and can withstand axial forces, resultant forces and considerable radial forces. The axial and radial clearances are smaller than for single row ball bearings. Rotation is not as flexible as single row ball bearings and is often used in some high precision applications. Single row cross roller ring bearings are mainly composed of 50 Mn, 42 CrMo and C45. Single row cross roller bearings are used in many applications: military, automated machinery, robotics, medical equipment, radar equipment, oil tanks, grinding machines and drilling machines.

double row ball slewing bearing VS three row roller slewing bearing

The double row ball slewing bearing structure uses two rows of steel balls, and its carrying capacity is larger than that of a single row. They have a good safety factor and can withstand axial loads, radial loads and tilting moments. The double row ball turning ring has three seat ring, and the steel ball and the spacer block can be directly arranged in the upper and lower rims. According to the stress condition, two rows of upper and lower steel balls with different diameters are installed. The double row and different ball slewing bearing rings have relatively large axial and radial dimensions and are structurally strong, and are commonly used for diameter tower cranes and load-bearing cranes. It is mainly composed of 50 Mn, 42 CrMo and C45. They have been widely used in many applications: fire trucks, pump trucks, some larger tower cranes, and truck cranes.

The three-row roller slewing bearing has three rows of raceways and the rolling elements are steel rollers. This structure can withstand the most loads compared to other structural load types. A heavy-duty machine usually uses them. The three-row roller rotor ring is equipped with a seat ring and an upper orbital ring. It does not separate the track from the radial track, and can determine the load of each row of the roller so that it can withstand various loads at the same time. It has the largest bearing capacity in four models, large axial and radial dimensions, and structure is firm. It is mainly composed of 50 Mn, 42 CrMo and C45. They have been widely used in many fields: wheeled excavators, wheeled cranes, ship cranes, offshore cranes, ladle turrets, heavy duty mobile cranes.

If you are an ordinary person, then you should be able to get a general idea of what they are after reading the above text. If you are a manufacturer, you will learn more about the differences between different slewing rings and their application in different industries.