Three row – roller slewing bearing , Slew bearing for tunnel-boring machines

This bearing is comprised of an Inner Ring, Outer Ring, three rows of rollers and seals. Three independent rows of rollers efficiently carry axial, radial and moment loads. With the most capacity per unit size this design also offers the highest stiffness and a low torque. The rectangular design allows for Internal, External, or no-gear designs.Typical Capacity Range:LoadEnglishMetricAxial (Thrust)100,000 – 17,300,000 lb444,822– 76,954,230 NRadial10,000 – 5,000,000 lb 44,482– 22,241,110 NMoment20,000 – 63,000,000 ft-lb27,116 – 85,416,660 Nm Typical Size Range mm (inch)O.D.I.D.Width634(24.96)336 ( 13.23)148 (5.83)4782 (188.3)4218 (166)270 (10.63) XZXD Slewing Ring Bearings:Turntable BearingsSingle row – four point contact ballSingle row – crossed rollerDouble row – angular contact ballThree row – rollerBall/Roller combined Typical Applications:Off-shore equipment, stackers/reclaimers, dock cranes, tunnel-boring machines, shipboard cranes, heavy mill equipment, mining equipment, excavators, radar and satellite antennas