Slewing Bearing for Shield Tunneling machine

The three row cylindrical roller combined slewing bearing can carry axial load, tilting 

moment, and radial load all at the same time. Compared to cross-cylindrical roller slewing 

bearing the load of each roller is reduced. Point contact is changed into line contact 

compared with that of a double row ball slewing bearing, the contact stresses are also 

decreased. Therefore, the load capacity of this design of slewing bearing is the highest 

under the conditions of a bearing with the same boundary dimensions. 
Axial load and radial load for this design are loaded by different rollers, in which the 

axial load and tilting moment are loaded by two groups of horizontal placed rollers, the 

radial load is loaded by one group of vertical placed rollers. The three row cylindrical 

roller combined slewing bearing mainly consists of the components such as inner ring, outer 

ring, three rows of rollers, cage (spacing blocks), a seal device etc. This slewing bearing 

design is suitable for most applications where a large axial load and tilting moment, or 

with a larger radial load, or with a low requirement for friction moment.

Three row rollers slewing bearing, which is matching with port crane. This bearing has high 

carrying capacity. It is widely used in the bucket, overweight transportation machinery, 

port machinery, mining machinery, and construction machinery, park recreation machine, 

filling machine, missile launchers and other large rotary device.