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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.


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

Dimension and Parameters
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Single-row Four Point Contact Ball Type Slewing Bearing (Non-gear type) Single-row Four Point Contact Ball Type Slewing Bearing (Non-gear type)
010.60.2240
  • Designations :
    010.60.2240
  • Boundary Dimension (mm)
  • Da :
    2418
  • Di :
    2065
  • H :
    144
  • Bolt Hole Diameter (mm)
  • D1 :
    2350
  • D2 :
    2131
  • n1 :
    48
  • n2 :
    48
  • φ1 :
    33
  • φ2 :
    33
  • Basic load ratings(KN) :
    13500
  • Weight
  • (Kg) :
    1250