composed of the double inner ring (or double outer ring), single outer ring (single inner ring), rolling element, cage and seal.
mainly used in 42CrMo as material, and the precision grade can be P0 P6 P5.
used in stackers and reclaimers, overweight transport machinery, port cranes, ladle turrets, shield machines and other applications.
https://www.efindbearing.com/slewing-bearing/three-row-roller-slewing-bearing.html