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China Single Row Four Point Contact Ball Slewing Ring Bearing For Crane

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Large diameters and thin sections are the main characteristics of this application. These particular bearings require strict process control. The Rollix Slew Bearings are very well-known in the world to accept the highest rotating speed and to control the temperature during working 24 hours a day. Our quality gives a very low level of maintenance. Xuzhou Wanda slewing rings manufacture millions of bottles all around the world everyday.

  • Internal gear slewing bearing
  • Wanda
  • 8482800000

A four-point contact ball bearing makes it easy to simplify machine designs that have a combination of radial, thrust and moment loads because it can handle all three simultaneously. They are primarily used for slow to moderate-speed applications, or where oscillatory movement is predominant.

Four-point contact bearings are especially effective in applications in which the rotating element has a high ratio of diameter to axial length. Most have a large ratio of bore to section size: the larger this ratio, the thinner and more flexible are the individual races. 

Four-point contact bearings can be manufactured in accordance with ABEC precision grades and in larger sizes. In applications involving oscillatory motion with limited angles of rotation, when the runout is zero for much of the rotation, an ABEC 1 bearing can sometimes be used instead of an ABEC 3 or 5. In such cases, the critical requirement (axial runout or radial runout) should be specified to meet ABEC standards. Noncritical areas can be left up to the bearing manufacturer.

Four point contact ball Slewing bearing is widely used in construction and energy industry. UIPI manufactures large diameter ball and roller slewing bearing utilized in many applications such as :


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Xuzhou WanDa Slewing Bearing Co.,Ltd.
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Xuzhou WanDa Slewing Bearing Co.,Ltd.
 No.15,Huaxia Road,the 3rd Industrial Park,Tongshan District, Xuzhou, Jiangsu,China.
  +86-516-83309366     +86-516-83303986
  +86-133-37939399   +86-180 2053 7858