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Double row ball slewing bearing (Internal 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)Weight
Da DiH LaLina3)ni3)mz(Kg)
I.973.2.22.00.D.6 973 786 97 36 17 36 17 8 100 141
I.1165.2.22.00.D.6 1165 962 97 36 17 36 17 10 98 187
I.1200.2.25.00.D.6 1200 963.5 110 36 21 36 21 10 98 230
I.1346.2.30.05.D.6 1345 1061.6 108 48 21 48 21 10 108 326
I.1750.2.30.20.D.6 1750 1418.4 120 48 25 48 25 12 120 564
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