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Single-row Four Point Contact 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.505.20.00.C 518 325 56 490 375 8 12 5 67 27.5
I.650.20.00.C 648 444 56 620 505 10 16 6 76 38
I.750.20.00.C 748 546 56 720 605 12 18 6 93 45
I.850.20.00.C 848 648 56 820 705 12 20 6 110 51.5
I.950.20.00.C 948 736 56 920 805 14 20 8 94 61.5
I.1050.20.00.C 1048 840 56 1020 905 16 22 8 107 67.5
I.1200.20.00.C 1198 984 56 1170 1055 16 24 8 125 81.5
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