Triple-Row Roller Configuration with Load Specialization
Two axial roller rows (upper and lower): Dedicated to handling bidirectional axial (thrust) loads and tilting moments, with rollers oriented parallel to the bearing’s axial direction.
One radial roller row (middle): Specifically designed to absorb radial loads, with rollers aligned perpendicular to the axial rows.
This division of labor ensures each load type is distributed across dedicated roller sets, eliminating load interference and maximizing bearing efficiency.
90° Crossed Arrangement for Axial RowsThe cylindrical rollers in the two axial rows are arranged at 90° alternating angles (similar to single-row cross roller bearings), ensuring full line contact with the raceways. This design enhances rigidity and load distribution, while minimizing elastic deformation under heavy loads.
Robust Multi-Ring StructureTypically constructed with three rings (inner ring, outer ring, and intermediate ring), the bearing’s raceways are precision-machined into dedicated rings to accommodate each roller row. The integrated structure eliminates the need for separate bearing assemblies, reducing overall complexity and installation space.
High Rigidity & Ultra-Precision PerformanceLine contact between rollers and raceways (across all three rows) provides exceptional rigidity—significantly outperforming ball-type or single-row roller slewing bearings. Precision grades (P5/P4) are available, with tight runout tolerances (≤0.02mm) and minimal backlash, ensuring precise rotational positioning even under dynamic loads.
Versatile Customization Options
Gear integration: Available with internal gear, external gear, or gearless designs (geared variants support direct torque transmission for heavy-duty rotational control).
Sealing & protection: Double-lip sealed (pre-lubricated with high-temperature grease, dust/water-resistant) or open-type (for clean, controlled environments).
Material & coating: High-strength chromium steel (standard) with carburizing/quenching heat treatment; optional stainless steel or zinc/nickel plating for corrosion resistance (ideal for marine/offshore applications).
Lubrication: Equipped with circumferential oil grooves and grease nipples for easy maintenance; oil-lubricated variants (with W33 oil holes) available for high-speed or continuous-operation scenarios.
Shock & Impact ResistanceThe robust roller design and even load distribution enable the bearing to withstand high shock loads and dynamic forces—critical for harsh industrial environments like construction, mining, and steel production.
Key Advantages
Unmatched Load Capacity for Extreme ConditionsSpecialized roller rows for axial, radial, and moment loads allow the bearing to handle ultra-heavy combined loads (e.g., radial loads up to several hundred tons, tilting moments up to thousands of kN·m). This makes it ideal for large-scale equipment where conventional bearings would be overloaded.
Superior Rigidity for Precision StabilityThe three-row line contact design minimizes deflection under heavy loads or rapid motion changes, maintaining positional accuracy for critical applications (e.g., machine tool turntables, robotic arms, and precision machining equipment).
Compact Design for Space-Constrained ApplicationsDespite its heavy-duty performance, the integrated three-row structure offers a more compact footprint than multi-bearing assemblies. This is particularly valuable for large equipment (e.g., cranes, 盾构 machines) where installation space is limited.
Extended Service Life & Reduced MaintenanceLoad specialization reduces wear and stress concentrations across all roller rows, while precision manufacturing and high-quality materials (e.g., bearing steel GCr15) enhance fatigue resistance. Sealed variants come pre-lubricated, extending re-lubrication intervals and minimizing downtime.
Cost-Effective Heavy-Duty SolutionEliminates the need for multiple separate bearings (radial, thrust, and moment bearings), simplifying assembly, reducing component count, and lowering overall equipment costs. The bearing’s long service life also reduces replacement frequency and lifecycle costs.
Reliability in Harsh Industrial EnvironmentsCorrosion-resistant coatings, sealed designs, and shock-resistant roller configurations ensure stable performance in dusty, humid, or high-vibration environments (e.g., construction sites, steel mills, offshore platforms).
