Slewing Bearing Type & Applications
Slewing Bearing 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. Compared to other rolling-element bearings, slewing ring bearings are thin in section and are often made in diameters of a meter or more. Slewing bearings are often made with gear teeth integral with the inner or outer race, used to drive the platform relative to the base.
Four-point contact ball slewing bearings
Features:For No Gear TypeInner Diameter: 260-4272mmOuter Diameter: 480-4726mmWeight: 55-4000kgFor Internal Gear Type Inner Diameter: 458-4272mm Outer Diameter:662-4726mm Weight: 94-4000kgFor External Gear Type Inner Diameter: 470-4272mm Outer Diameter: 694-4726mm Weight: 93.1-4000kg
Crossed Cylindrical Roller Slewing Bearings
Features:For No Gear Type Inner Diameter: 320-4272mm Outer Diameter: 550-4726mm Weight: 85.6-3100kg For Internal Gears Type Inner Diameter: 398-4272mm Outer Diameter: 602-4726mm Weight: 80-3100kg For External gear type Inner Diameter: 398-4272mm Outer Diameter: 602-4726mm Weight: 80-3100kg
Double row angular contact ball slewing bearings
Features:Main structural characteristics: two rows of steel balls of different diameters are placed to bear the axial force and upsetting moment. The most prominent feature is flexible rotation, but its bearing capacity is lower than that of the triple-row cylindrical roller slowing bearing. It is mainly used in machines with low load and high use frequency, such as wharf tower crane.
Three row cylindrical roller slewing bearing
Features:Main structure characteristics: two rows of cylindrical rollers are laid horizontally around the circumference mainly to bear high axial load and upsetting moment; and one row of cylindrical rollers are laid vertically mainly for the upsetting
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