Slewing ring without teeth 010.20.290
ballsingle-rowfor wind turbine

slewing ring without teeth
slewing ring without teeth
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Characteristics

Teeth
without teeth
Rolling element
ball
Geometry
single-row
Applications
for wind turbine
Other characteristics
precision
Inner diameter

Max.: 3,772 mm
(148.5 in)

Min.: 120 mm
(4.7 in)

Outer diameter

Max.: 4,226 mm
(166.378 in)

Min.: 280 mm
(11.024 in)

Width

Max.: 120 mm
(4.724 in)

Min.: 60 mm
(2.362 in)

Description

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. (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 resemble oversize aircraft control surface bearings. 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. > > > Application It can be used for slewing conveyer, welding manipulator, light & medium duty crane, excavator, and other construction machinery, welding arms and positioners, light,medium duty cranes,excavators and other engineering machines.

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