Slewing Bearings
A 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.
- 50Mn/42CrMo Material 14'' SE14 Enclosed Housing Slew Drive With DC Motor
- 25.7
- Non-Contact Seal
- Slewing bearing/slewing rings 010.20.200
- Open Type
- 22244cck/w33-qbl
- trailer ball bearing turntable QW1120.32A
- Plastic
- 11300
- Roller and Ball type Slewing Bearings with fast delivery
- 16mm
- sf688-2rsw4-zen
- China Construction Ship Gantry Crane Turntable Bearing Slewing Bearing
- 3314jc3-nsk
- 173000
- single row ball swivel turntable bearing slewing bearing
- 6300
- This 3306A-2RS1TN9/W
- large size rothe erde wind turbine slewing ring bearing
- 2 x 3/8-16 UNC
- 60.325 mm
- single row ball slewing ring excavator turntable bearing
- This 22244EJW33C4 be
- 59.40 KGS
- High Load Ladle Turret Slewing Bearing
- 39100 N
- 35.000 mm