Bearing Machinery Technology Co., Ltd

NSK 35bd5020 Bearing

 

Slewing Ring

 Slewing bearing or slew[ing] ring is a rotational rolling-element 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 often use two rows of rolling elements. They often use three race  elements, such as an inner ring and two outer ring "halves" that clamp together axially.

Slewing bearings are often made with gear teeth integral with the inner or outer race, used to drive the platform relative to the base.

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.

Excavator Sumitomo Sh240-5 Slewing Bearing, Slewing Ring, Swing Circle
Excavator Sumitomo Sh240-5 Slewing Bearing, Slewing Ring, Swing Circle
0.551 Inch | 14 Mill
Precision Ball Beari
3Cr13 Turntable Bearing / Slewing Ring Bearing (013.20.1220)
3Cr13 Turntable Bearing / Slewing Ring Bearing (013.20.1220)
N/A
0.0
Excavator Carterpillar Cat225 Swing Circle, Slewing Ring, Slewing Bearing
Excavator Carterpillar Cat225 Swing Circle, Slewing Ring, Slewing Bearing
0808250274949
0 Inch | 0 Millimete
Single-Row Four Point Contact Slewing Ball Bearing with Internal Gear 9I-1b40-1086-0450
Single-Row Four Point Contact Slewing Ball Bearing with Internal Gear 9I-1b40-1086-0450
M06288
MOLINE BEARING
Excavator Hyundai R210LC-3 Swing Circle, Slewing Bearing, Slewing Ring
Excavator Hyundai R210LC-3 Swing Circle, Slewing Bearing, Slewing Ring
Precision Ball Beari
1 Rib Inner Ring and
Excavator Caterpillar Cat320d Slewing Bearing/Ring/Circle
Excavator Caterpillar Cat320d Slewing Bearing/Ring/Circle
M06288
0.0
Excavator Carterpillar Cat345b Swing Circle, Slewing Bearing, Slewing Ring
Excavator Carterpillar Cat345b Swing Circle, Slewing Bearing, Slewing Ring
Expansion
N/A
Excavator Doosan S140LC-V Slewing Ring, Swing Circle, Slewing Bearing
Excavator Doosan S140LC-V Slewing Ring, Swing Circle, Slewing Bearing
N/A
2.515
Swing Circle, Slewing Ring, Slewing Bearing for Excavator Liebherr 934
Swing Circle, Slewing Ring, Slewing Bearing for Excavator Liebherr 934
B04144
1016
Industrial Robot Speed Reducers Crossed Roller Bearing Rb30035
Industrial Robot Speed Reducers Crossed Roller Bearing Rb30035
Polyamide
55 mm
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Slew Drive Motor
Thin Section Open Bearing
Swing Ring For Daewoo Excavator
Psl Bearing
Imo Slew Bearing
Small Slewing Bearing
Rollix Slewing Ring
Four-Point Contactbearing
Slewing Ring
Double Row Slewing Bearing
Solar Tracker Bearing
Three-Row Roller Slewing Ring Bearing
Madill Slewing Bearing
Hitac Slewing Bearing
Excavator Slewing Ring
Crane And Excavator Slewing Ring Bearing
Geared Slewing Ring
Kmi Slew Drives
Other Specific Model Slewing Bearing
Kinematics Slewing Drive
John Deere Slewing Bearing
Double Row Ball Slewing Ring Bearing