الوصف

Four-point contact ball bearings are separable structure, a single bearing can replace the front or the back of the portfolio combined angular contact ball bearings.
When radial clearance is the same, compared with other ball bearings, four-point contact ball bearings have  smaller axial clearance , higher limit speed .
Four-point contact ball bearings are appropriate for bearing pure axial load or the combined load which is formed by primary axial load and  minor radial  load. As a dual semi-inner (or outer), put the ball in number and have greater carrying capacity.
This slewing bearing is used in crane and can match the parts of the famous cranes and excavators. The four-point contact ball slewing bearing is composed of 2 seat-rings, if features compact in design, and light in weight. The balls contact with the circular race at four points, via which the axial force, radial force and resultant moment maybe born simultaneously.
It is mainly used for slewing conveyers, welding arm and positioner, medium duty cranes, excavators and other engineering machines.