http://www.szslewingring.com/slewing-ring-bearing/single-row-ball-slewing-ring-bearing/slewing-bearing.html
Construction single row Crane Slewing BearingThis ring bearing is used for crane or crane truck and we are permanent supplier for SANY in China mainland.Slewing bearing also known as slewing ring bearing, turntable bearing. It contain outer ring, inner ring, rolling body, seals. The material of our products are generally high alloy-structural?steels ,such as 42CrMo 50Mn.The slewing bearing can work normally at temperature of -30℃?to +70℃,and we can design special type as customer need.