Slewing bearing is a sizable of bearing with exceptional structure that can bear integrated load like axle load, radial load and overturning load. It combines support, rotating, tranny, fixed, sealed, anti-corrosion and additional functions into one unit. Widely used in lifting machinery, structure machinery, transmitting machinery, mining and metallurgy machinery, medical gear and radar, ship, wind power and various other industries.
Slewing bearings can be divided into many different types according to their diverse structural forms, such as for example 4 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 kind has different qualities according to its design and structure, rendering it well suited for specific applications. For example Single row four stage contact ball slewing bearings are simple in structure, nonetheless they can bear major radial load, and can also bear a number of axial and overturning loads. However, when the mechanism has great requirements on the precision and rigidity of the bearing, or the bearing needs to meet the zero clearance or harmful clearance operating conditions, the cross cylindrical roller slewing bearing would be the correct choice.
Therefore, when selecting slewing bearings, the next aspects is highly recommended:
When the problem of precision is to choose the dominant parameters, we generally choose the cross roller slewing bearing since it has smaller sized clearance and larger accuracy.
How big is load is probably the important factors in determining the bearing size of slewing bearings. They works extremely well in a variety of applications where in fact the load size and direction may change.
· Operating temperature
Generally, the allowable functioning temperature of a slewing ring depends mainly on the isolation gasket and the sealing material used for lubrication. The allowable functioning temperature ranges from -25 to + 70°C. If slewing bearings must operate at extreme temperature ranges, please speak to our engineer .
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.
Sealing is vital to the overall performance of slewing bearings. Skilled seals found in slewing bearings present good protection against dampness and pollution, and ensure that grease plays a significant part. If slewing bearings do the job under extreme circumstances, such as contact with water, vacuum, corrosive contaminants or radiation, please speak to our technicians for specific solutions.
Kaydon slewing bearings
Kaydon slewing bearing solutions are perfect for:
Optimal economy in a given 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 offer a wide variety of solutions for the most demanding technical specs in a variety of applications, including:
Aerospace and defense
Oil & gas
Semiconductor manufacturing equipment
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The Kaydon slewing bearing selector permits you to search our standard slewing bearings by part number or bearing requirements. Outcomes consist of load charts and downloadable 3D drawings.