A slewing bearing or slew[ing] ring is a rotational rolling-element bearing or plain bearing that typically supports a heavy but slow-turning or slow-oscillating load, often a horizontal platform such as a conventional crane, a swing yarder, or the wind-facing platform of a horizontal-axis windmill. (To "slew" means to turn without change of place.)
Compared to other rolling-element bearings, slewing bearings are thin in section and are often made in diameters of a metre or more; the slewing bearings on the Falkirk Wheel are 4 metres diameter and fit over a 3.5 metre axle. Slewing bearings resemble oversize aircraft control surface bearings.
Slewing bearings often use two rows of rolling elements. They often use three race elements, such as an inner ring and two outer ring "halves" that clamp together axially.
The Single Row Four Point Contact Ball Slewing Bearing is composed of 2 seat rings.It features compact in design,and light in weight.The balls contact with the circular race at four points,via which the axial force,radial force and resultant moment may be born simultaneously.
wind generator, Marine Crane, Offshore Crane,Harbor mobile crane, Ferris wheel,stacker,Unloader,Construction Machinery,Ladle turret,shield machine,radar and so on
1. We can supply various size slewing ring bearings.
2. Type: Non-teeth, internal teeth, external teeth
3. Diameter range: 200mm-----4500mm, Weight range: 20kg--------5100kg
4. Design and manufacture according to customer needs, OEM bearing.
5. High quality bearing, competitive price, prompt delivery and best services.