A slewing bearing, slew[ing] ring, or turntable bearing is a rotational rolling-element bearing that typically supports heavy, slow-turning, or slowly-oscillating loads in combination. Slewing bearings are often used in horizontal platforms, such as conventional cranes, swing yarders, amusement rides, and wind-facing platforms of horizontal-axis wind turbines.
A slewing bearing, slew[ing] ring, or turntable bearing is a rotational rolling-element bearing that typically supports heavy, slow-turning, or slowly-oscillating loads in combination. Slewing bearings are often used in horizontal platforms, such as conventional cranes, swing yarders, amusement rides, and wind-facing platforms of horizontal-axis wind turbines.
Source: Wikipedia "Slewing bearing" · CC BY-SA 4.0
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