SLEWING BEARING
Slewing bearing is certainly a large of bearing with specialized structure that may bear integrated load just like axle load, radial load and overturning load. It combines support, rotating, transmission, fixed, sealed, anti-corrosion and different functions into one product. Trusted in lifting machinery, development machinery, transmission machinery, mining and metallurgy machinery, medical gear and radar, deliver, wind power and other industries.
Slewing bearings can be divided into many different types according to their several structural forms, such as for example four point contact ball slewing bearing ,solo row cross roller slewing bearing, twice row contact ball slewing bearing, 3 row roller slewing bearing and so on. Each type has different features according to its design and structure, which makes it ideal for specific applications. For example Single row four stage speak to ball slewing bearings happen to be simple in structure, however they can bear large radial load, and may also bear certain axial and overturning loads. However, when the system has large requirements on the precision and rigidity of the bearing, or the bearing must meet the zero clearance or unfavorable clearance operating circumstances, the cross cylindrical roller slewing bearing is definitely the correct choice.
Therefore, when choosing slewing bearings, the following aspects should be considered:
· Precision
When the problem of precision is to select the dominant parameters, we usually opt for the cross roller slewing bearing since it has scaled-down clearance and larger accuracy.
· Load
How big is load is probably the important factors in determining the bearing size of slewing bearings. They can be used in a variety of applications where the load size and direction may change.
· Operating temperature
Generally, the allowable operating temperature of a slewing ring depends primarily on the isolation gasket and the sealing material used for lubrication. The allowable operating temperature ranges from -25 to + 70°C. If slewing bearings are required to operate at extreme temperatures, please get in touch with our engineer .
· Vibration
For applications involving vibration, pre-loaded four-point contact ball slewing bearings and cross cylindrical roller slewing bearings are available.
· Turning speed
Four-point contact ball slewing bearings produce a smaller amount friction than cross-cylindrical roller slewing bearings, therefore the four-point contact ball slewing bearings also have higher rotational speeds.
· Seals
Sealing is vital to the effectiveness of slewing bearings. Qualified seals found in slewing bearings provide good protection against wetness and pollution, and make certain that grease plays an essential role. If slewing bearings work under extreme conditions, such as exposure to water, vacuum, corrosive contaminants or radiation, please speak to our technical engineers for specific solutions.
Kaydon slewing bearings
Kaydon slewing bearing solutions are perfect for:
Optimal economy in confirmed envelope dimension
Heavy-duty applications needing significant load-carrying capacity
Patterns where precise positioning is crucial
The unique requirements of wind generators
Kaydon’s slewing bearings give you a wide variety of alternatives for the most demanding specifications in a number of applications, including:
Aerospace and defense
Heavy equipment
Industrial machinery
Medical systems
Mining
Oil & gas
Renewable energy
Robotics
Semiconductor manufacturing equipment
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Bearing selector

The Kaydon slewing bearing selector enables you to search our standard slewing bearings by part number or bearing requirements. Effects include load charts and downloadable 3D drawings.