Three-row Roller Slewing Bearings
Three-row roller slewing bearing decreases the bearing diameter by distributing the loads in different directions to different rows of raceways and rollers, which makes the slewing ring more compact and improves the load capacity. Three-row roller slewing ring is ideal for lifting, mining, material transportation, marine, and other engineering machinery.
Three-row roller slewing bearing details:
- Range of external diameter: 100 mm to 15000 mm
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Ring material: 42CrMo / 50Mn/ C45
- Ball/roller material: GCr15
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Cage material: steel 20 or ZL102 cast aluminum alloy
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Spacer material: nylon 6 / nylon 66
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Quenching hardness of raceway: HRC55-62
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Tooth type: no gear, internal gear, external gear
Applications:
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Wheels and crawler excavators
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Wheel cranes
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Special-chassis cranes
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Marine cranes
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Port cranes
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Tunnel Boring Machines
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Wind Turbines
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Molten steel running tables
Structure of three-row roller slewing bearing
- Inner Ring
- Outer Ring
- Seal
- Spacer
- Ball/Roller
Seals
The sealing of the slewing bearing, on the one hand, is to prevent the leakage of filled grease, on the other hand, is to prevent the outside dust, impurities and moisture from invading into the exterior of the bearing and affecting its work. The sealing ring of LYJW slewing bearing is made of nitrile rubber material, which is resistant to high temperature and corrosion.
Raceway
The raceways of slewing rings are quenched on the surface. Its quenching hardness is HRC55-62, making sure that its effective hardening depth is enough.
Toothing
Due to the need to transmit force, slewing bearings usually have teeth on one of the rings. The toothing is generally normalized or quenched and tempered. Depending on the application, the gears can also be full-tooth hardened or single-tooth inductively hardened. Single tooth inductively hardening can be divided into full tooth hardening and tooth foot (flanks and base) hardening.
Full tooth hardening
Tooth flanks and base hardening
Tooth flanks Hardening
