Three Row Cylindrical Roller Slewing Bearings for Heavy Load Engineering Machinery

What are Three Row Cylindrical Roller Slewing Bearings?

Three row cylindrical roller slewing bearings are heavy-duty rotational components designed to handle massive axial loads, radial loads, and overturning moments simultaneously.

Three gear configuration options are available:gearless, external gear and internal gear.Outer diameter ranges from 300 mm-6000 mm for standard versions; custom sizes can reach up to 15000 mm.Precision grades include P0 and P5.

Ring materials are 42CrMo, 50Mn or C45 high-strength alloy steel with quenched raceway hardness HRC 55-62.Cylindrical rollers are made of GCr15 high-carbon chromium steel.Cage options:Steel 20 or ZL102 cast aluminum alloy; spacers adopt Nylon 6/Nylon 66.Sealing choices include open-type, RS contact rubber seals and ZZ metal dust covers.

Standard products have defined lead-time; custom-built bearings require confirmation according to drawings, material and production schedules.Custom scope includes special dimensions, tooth-profile modification, high-temperature adaptation and special sealing structures.

The features of Three Row Cylindrical Roller Slewing Bearings

Decoupled Load Pathways:Incorporates three distinct roller tracks within a single bearing assembly:

Top Horizontal Roller Row:Absorbs downward axial (thrust) loads.

Bottom Horizontal Roller Row:Absorbs upward axial (lifting) loads and tilting moments.

Middle Vertical Roller Row:Handles pure radial loads.

Maximum Load Capacity & Rigidity:The line contact of cylindrical rollers across three isolated raceways enables extreme static and dynamic load capacities, resisting severe tilting moments and impact shock loads without elastic ring distortion.

Segmented Ring Design:Manufactured with split rings (typically a split outer ring or split inner ring held together by mounting bolts) to facilitate assembly, internal roller positioning, and raceway precision grinding.

Integrated Drive Options:Available with internal gear teeth, external gear teeth, or gearless rings, allowing direct integration into planetary gear drive systems.

High Operational Reliability:Isolating radial forces from axial forces ensures predictable wear patterns, uniform load distribution, and extended service life under heavy cyclic loading.

The applications of Three Row Cylindrical Roller Slewing Bearings

Heavy Cranes & Lifting Equipment

Applications:Heavy crawler cranes, shipyard gantry cranes, high-capacity offshore deck cranes, container cranes, and large-tonnage truck cranes.

Role:Supports massive suspended loads at long boom radiuses.The upper and lower horizontal roller rows absorb high axial thrust and overturning moments, maintaining structural stability without housing distortion.

Mining & Heavy Excavation Equipment

Applications:Bucket wheel excavators, draglines, stacker/reclaimers, and large rotary drilling rigs.

Role:Manages severe cyclic loads, continuous material impact, and violent dynamic shocks encountered during continuous rock and ore digging operations.

Tunneling & Underground Construction

Applications:Main cutterhead drives for Tunnel Boring Machines (TBMs).

Role:Connects the rotating cutterhead to the TBM shield.The high radial stiffness provided by the vertical middle roller row ensures precise boring alignment and resists extreme thrust resistance from subterranean rock faces.

Marine, Offshore & Energy Systems

Applications:Offshore crane pedestals, turret mooring systems, FPSO pipe handling equipment, ship loaders/unloaders, wind turbine main shaft drives, and tidal energy turbines.

Role:Absorbs unpredictable wave-induced tilting moments and high multi-directional hydrodynamic forces while maintaining reliable rotation in corrosive marine environments.

Heavy Metallurgy & Steel Plants

Applications:Ladle turrets, blast furnace gas covers, arc furnace swivels, and molten steel running tables.

Role:Manages massive static and thermal-expansion loads during continuous casting and steel-refining rotations under high operating temperatures.

Manufacturer of Three Row Cylindrical Roller Slewing Bearings

Newbeetrans is a professional manufacturer of three-row cylindrical roller slewing bearings for heavy-load engineering machinery.The complete manufacturing chain covers large-size forging, heat-treatment, ultra-large-diameter precision turning & grinding, assembly and full-performance testing laboratories under ISO 9001 quality-management certification.

Stock & Customization Capacity

Standard series products are available for delivery.The engineering team provides full custom services:special outer/inner dimensions, internal-/external-/gear-less modification, tooth-profile customization, high-temperature/corrosion-resistant material upgrading and dedicated sealing configuration.Custom lead-time is subject to drawing complexity, raw-material supply and production arrangement.

Strict Full-Process Quality Assurance

Raw-material batches go through spectral and metallurgical inspection.Every finished three-row cylindrical roller slewing bearing undertakes 100 % inspection:dimension check, raceway hardness testing, pre-assembly verification and compound-load performance assessment.Material test certificates and SGS third-party inspection reports can be provided upon request.

Advanced Production Infrastructure

Large-diameter CNC processing equipment, dedicated raceway quenching furnaces and heavy-duty slewing-bearing test benches are deployed.MES production-management system achieves full-batch traceability to guarantee stable P0/P5 precision requirements for giant-size slewing components.

Global Sales and Technical Support

The company cooperates with global sea-freight and air-freight carriers, supporting FOB, CIP, DAP and other standard international trade terms.Technical experts provide remote model-selection consulting, installation-surface requirement guidance and pre-tightening advice for worldwide heavy-equipment manufacturers.

For technical specifications,pricing,or custom bearing solutions:

Email:paul@newbeetrans.com 

Website:www.newbeetrans.com