Crossed Cylindrical Roller Slewing Bearing

The cross roller slewing bearing is mainly composed of an inner ring, an outer ring, rollers, spacers or cages. Its main feature is the cross arrangement of rollers. The rollers arranged crosswise at 90° form a cross raceway structure.

There is no difference between the cross roller slewing bearing and the single row ball slewing bearing in appearance, but there are huge differences inside: the single row ball slewing bearing raceway adopts a peach-shaped groove, and the raceway and the steel ball are loaded in a four-point contact manner. The cross-ball slewing bearing raceway is two right-angled surfaces of 90°. The cylindrical rollers are arranged alternately according to the direction of the roller's rotation axis. The two surfaces of the raceway are in contact with the outer diameter of the cylindrical roller and carry the load. In short, the raceway and the rolling element of the single row ball slewing bearing are in four-point line contact, while the raceway and the rolling element of the cross-ball slewing bearing are in surface contact. Its unique structure gives it a higher load-bearing capacity and stability. When an external load acts on the slewing bearing, the roller rolls in the raceway, bearing axial load, radial load and overturning moment, and has a higher dynamic load capacity.

Cross-ball slewing bearings are divided into toothless, external and internal gear structures, and can be matched with different pinions according to different working conditions.

Compared with single-row ball slewing bearings, cross-roller slewing bearings have the advantages of high rigidity and high precision, and are widely used in construction stacking robots, medical industry, precision instruments, industrial automation slewing and other fields.

Cross Roller Cylindrical Slewing Bearing without Gear

External Gear Cross Cylindrical Roller Slewing Bearing

Internal Gear Cross Cylindrical Roller Slewing Bearing