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THB has delivered a slewing ring for harbour cranes in Europe that has an outer diameter of more than 6,000mm and weighs 13 tons.

The structure of the ring is triple-row cylindrical roller type with external gear.

The three rings are forged and each ring is unitary.

For hardened depth on the raceway, the ring was tested before the induction hardening.

The slewing ring has been exported to Europe and is being used on a ship as the bottom of a cable basket.

The first and second rows of rollers in the cages are made of aluminum alloy.

The third row of rollers, the ‘spacer’, is made of nylon.

During the final assembly and before the packing, the slewing ring was lubricated with lithium grease.

THB Bearings

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