... manufacturer.Type:Non-gear, External Gear, Internal GearHardness:Tempering and quenching the forgings to 229-269HB, Case harden rarden ... , Case depth more than 3. Application:Tunneling equipment, harbor and shipyard cranes, construction equipment, mobile cranes, offshore technology, tower ... ship deck cranes, railway cranes, man lifts, wind turbines, and more. Three-row roller series swing bearing