What Is Single Row Ball Slewing Bearing

Single row ball slewing bearings are used in a wide range of industries and are the most widely used of all slewing bearings in different applications. The light weight of the bearing makes it a target that many people choose when supporting. In particular, when entangled in which support to choose, most people will choose a Single row ball slewing bearing. This article will introduce this support that is favored by many people.

You will get the following information:

• Definition

• Application

• Advantage

• Specification

1、 Definition

The single row ball 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.

2、Applications 

Single row ball slewing bearings can support radial, axial and tilting moment loads and can be used in any direction, either alone or in combination. Therefore, a single bearing can be substituted for the combined arrangement of the radial and axial bearings, which will greatly reduce the overall cost and simplify the design. The wings are sealed on both sides and lubricated with high quality grease. It can be reinstalled with a lubricated nipple and is especially easy to install.

Single volleyball slewing bearings are available in many designs with internal, external or no gears. Due to its small cross-section, large bearing capacity and good overall gear performance, these bearings have become ideal structural components and are widely used in industrial products such as construction machinery and mining equipment.

Mainly have the following applications:

1) Rotary conveyor

2) Welding manipulator

3) Light and medium cranes (truck cranes, deck cranes, aerial platforms, etc.)

Truck cranes typically use large single-row four-point contact ball slewing bearings. This type of slewing bearing can withstand large axial loads, radial loads and overturning moments, enabling the crane to reliably and reliably lift heavy loads.

4) Different excav

Excavators usually use a single-row four-point contact ball slewing ring with internal hardened gears. This type of slewing bearing can withstand axial loads, radial loads and overturning moments and can withstand large shocks. The rotation is flexible and stable.

5) Drive components for large rope winches.

6) Food Machinery,

7) Canned machinery

8) Environmental machinery.

3、Advantage

1) save space

2) Weight saving

3) save costs

4) Rigidity and accuracy

5) Quick installation

6) Reduced maintenance

4、Specification

The single row ball slewing bearing is a separable bearing, the QJ 0000 inner ring is two pieces, the QJF 0000 type is two outer rings, and the contact angle is 35°. Inner diameter: 150-480 mm, outer diameter: 225-870 mm, weight: 5.1-470, kg type: QJ, QJF. When subjected to a pure radial load, each sphere is in contact with the ring Ar at four points and is in contact with two points under pure axial load. The bearing can withstand axial loads in both directions and a certain moment load, featuring single row and double row angular contact ball bearings. They can only work properly at high speeds when two points of contact are formed.

The materials for single row ball bearings are mainly 50 Mn, 42 CrMo and C45.

Under normal circumstances, a single row ball slewing bearing can meet most needs, but it does not mean that you can choose a single volleyball slewing bearing anyway, or you can decide according to your needs, otherwise it may be supported as a mechanical joint. There will be failures that can have serious consequences.