SLEWING BEARING
Slewing bearing is definitely a big of bearing with special structure that can bear integrated load like axle load, radial load and overturning load. It combines support, rotating, transmission, fixed, sealed, anti-corrosion and additional functions into one device. Widely used in lifting machinery, building machinery, transmission machinery, mining and metallurgy machinery, medical devices and radar, ship, wind power and different industries.
Slewing bearings could be divided into many different types according to their numerous structural forms, such as several point contact ball slewing bearing ,single row cross roller slewing bearing, dual row contact ball slewing bearing, three row roller slewing bearing and so on. Each type has different qualities according to its design and structure, so that it is ideal for specific applications. For instance Single row four level speak to ball slewing bearings are simple in structure, but they can bear large radial load, and will also bear several axial and overturning loads. However, when the mechanism has large requirements on the precision and rigidity of the bearing, or the bearing needs to meet up with the zero clearance or detrimental clearance operating conditions, the cross cylindrical roller slewing bearing could be the correct choice.
Therefore, when selecting slewing bearings, the next aspects is highly recommended:
· Precision
When the situation of precision is to choose the dominant parameters, we generally pick the cross roller slewing bearing since it has smaller sized clearance and higher accuracy.
· Load
The size of load is probably the important factors in determining the bearing size of slewing bearings. They can be utilized in a variety of applications where in fact the load size and way may change.
· Operating temperature
Generally, the allowable operating temperature of a slewing ring depends generally on the isolation gasket and the sealing material used for lubrication. The allowable working temperature ranges from -25 to + 70°C. If slewing bearings must operate at extreme temps, please get in touch with our engineer .
· Vibration
For applications involving vibration, pre-loaded four-point speak to ball slewing bearings and cross cylindrical roller slewing bearings can be found.
· Turning speed
Four-point contact ball slewing bearings produce fewer friction than cross-cylindrical roller slewing bearings, therefore the four-point contact ball slewing bearings also have higher rotational speeds.
· Seals
Sealing is crucial to the functionality of slewing bearings. Qualified seals used in slewing bearings give good protection against moisture and pollution, and make sure that grease plays an essential part. If slewing bearings do the job under extreme conditions, such as contact with drinking water, vacuum, corrosive contaminants or radiation, please speak to our technicians for specific solutions.
Kaydon slewing bearings
Kaydon slewing bearing solutions are ideal for:
Optimal economy in confirmed envelope dimension
Heavy-duty applications requiring significant load-carrying capacity
Patterns where precise positioning is crucial
The unique requirements of wind turbines
Kaydon’s slewing bearings give you a wide variety of solutions for the most demanding features in a variety 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 allows you to search our standard slewing bearings by part number or bearing requirements. Outcomes include load charts and downloadable 3D drawings.