Single-row Four Point Contact Ball Type Slewing Bearing (External gear type)

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. 

As for other bearings that reciprocate, rather than rotating continuously, lubrication can be difficult. The oil wedge built up in a continuously rotating bearing is disrupted by the stop start motion of slewing. Instead, a hydrostatic bearing with pumped oil flow may be used.


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SelectInquiryDesignations Boundary Dimension (mm)Bolt Hole Diameter (mm) Gear Parameters Basic load ratings(KN)Weight
DdHD1D2n1n2mDaZ(Kg)
012.75.4000 4226 3772 174 4136 3864 60 60 25 4350 171 30200 3600
011.75.4500 4726 4272 174 4636 4364 60 60 22 4840 271 34100 4000
012.75.4500 4726 4272 174 4636 4364 60 60 25 4850 191 34100 4000
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