double-row slewing rings, 

roller/ball combination bearings, 

single-row roller slewing bearing ,

cross-roller bearing,

three-row roller bearing slewing rings, 

axial-roller bearings, 

single-row ball bearing slewing rings, 

double-row ball bearing slewing ring, 

double-axial ball bearing, 

single-row ball bearing slewing rings, 

four-point contact bearings (without gearr, with external gear ,with internal gear) 

slewing bearing