hot sales small diameter four piont contact ball slewing ring bearing with external gear for crane

详情

High precision turntable slewing ring bearing without gear for rotating machinery offered by China manufacturer JIANGSU SHUANGZHENG. Buy High precision turntable slewing ring bearing without gear for rotating machinery directly with low price and high quality.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.