BRS Bearing-high precision crossed roller bearing, slewing ring bearing: SKF RKS.21 light series four point contact ball slewing bearings with an external gear
China (RKS. 162.16.1754) SKF Roller Slewing Ring Bearing (RKS. 162.20.1904) Slew Ring - China Rks. 162.16.1754, Rks. 162.20.1904