Slew bearing catalogue
5 Steps to Testing an Excavator Slewing Bearing
January 9, 2023
The catalog of FH slewing bearings contains thousands of standard models, and we also focus on the research and development of non-standard slewing bearings. What is a slewing bearing? Slewing bearings can be divided into many different types according to their different structural forms, such as four-point contact ball slewing bearings, single-row cross roller slewing bearings, double-row contact ball slewing bearings, three-row roller slewing bearings, etc. Each type has different characteristics based on its design and construction, making it suitable for specific applications. For example, single-row four-point contact ball slewing bearings have a simple structure, but they can withstand heavy radial loads, and can also withstand certain axial loads and overturning loads. However, when the mechanism has high requirements on the precision and rigidity of the bearing, or the bearing needs to meet the working conditions of zero clearance or negative clearance, the cross cylindrical roller slewing bearing will be the right choice.
Therefore, when choosing a slewing bearing, the following aspects should be considered:
- precision
When the accuracy problem is the main parameter to choose, we usually choose the cross roller slewing bearing because it has smaller clearance and higher accuracy. - load
The size of the load is one of the important factors to determine the size of the slewing ring bearing. They can be used in a variety of applications where the magnitude and direction of the load may vary. - Operating temperature
In most cases, the allowable operating temperature of the slewing bearing mainly depends on the isolation gasket and the sealing material used for lubrication. The allowable operating temperature range is -25 to +70°C. If slewing bearings are required to operate in extreme temperatures, please contact our engineers. - vibration
For applications involving vibration, preloaded four-point contact ball slewing rings and crossed cylindrical roller slewing rings are available. - rotation speed
The four-point contact ball slewing bearing produces less friction than the crossed cylindrical roller slewing bearing, so the four-point contact ball slewing bearing also has a higher speed. - sealing strip
Sealing is critical to the performance of slew bearings. Qualified seals used in slewing bearings provide good protection against moisture and contamination and ensure that grease plays its important role. If slewing bearings are operating under extreme conditions, such as exposure to water, vacuum, corrosive pollutants or radiation, please contact our technical engineers for specific solutions.
