There are many slewing bearing brands and each country has its own brand.

China: WCB LYC ZWZ UWE SBI WANDA ZYS LYXQL C&U

USA: KAYDON SILVERTHIN IGUS IMO LIEBHERR

Germany: ROTHE ERDE ROBALLO PSL ROTEK INA

Italy: RIMA TORRIANI GALPERTI ISB LEONESSA

Japan: DKK SENSHU MOMO KOYO NSK

South Korea: SHILLA

Russia: АВТОКРАН

France: ROLLIX SNR

Slovenia: ROTIS

Sweden: SKF