Four Point Contact Ball Slewing Bearing

1.Product Introduction: It can simultaneously bear bidirectional axial and radial loads, with high slewing accuracy and low friction coefficient, suitable for the 360° continuous slewing requirements of medium and large-sized equipment.
2.Structure Type: It has an annular integrated structure. The inner and outer rings are equipped with double raceways, with built-in four-point contact steel ball groups and separating cages. Some models are equipped with sealing devices and reserved with standard mounting holes.
3.Size Range: Outer ring diameter: 300 - 3000mm, inner ring diameter: 250 - 2800mm, height: 15 - 120mm.
4.Material: Inner ring / outer ring: 50Mn, 42CrMo; rolling elements: GCr15 bearing steel, GCr15SiMn (optional for impact resistance); seals: nitrile rubber, fluororubber (optional for oil and high temperature resistance).
5.Application Fields: Construction machinery (slewing platform of tower cranes, excavators), wind power equipment (slewing of nacelles), machine tools (slewing tables of vertical lathes), port machinery.
6.Key Inspection Items: Dimensional accuracy, slewing resistance, sealing and waterproof performance.

Product Description

Four Point Contact Ball Slewing Bearing: Precision & Durability for Heavy-Duty Applications

A Four Point Contact Ball Slewing Bearing is engineered to handle bidirectional axial and radial loads simultaneously, making it ideal for equipment requiring 360° continuous rotation. With its unique four-point contact design, this bearing distributes stress evenly across the raceways, ensuring high rigidity, minimal friction, and extended service life—even in extreme conditions like high temperatures or heavy shock loads. At LUOYANG INNO BEARING CO., LTD, we combine 30+ years of expertise with advanced materials to deliver Slewing Bearings that excel in industries ranging from construction machinery to renewable energy.

Technical Parameters

Parameter Specifications
Load Capacity Axial (500–50,000 kN), Radial (300–30,000 kN)
Materials 50Mn/42CrMo steel rings, GCr15 bearing balls
Dimensions Outer diameter 300–3000mm (custom up to 5000mm)
Precision ISO 492 P4/P5 grades
Temp Range -30°C to +150°C (ceramic-coated options)

Why Choose Us?

  • Proven Expertise: Optimized for durability with surface hardness ≥55 HRC.
  • Tailored Solutions: Bespoke designs (e.g., φ4000mm+ diameters) in 15–30 days.
  • Rigorous Quality: 12+ tests per bearing, 99.9% defect-free rate.
  • Fast Delivery: 1,000+ standard models shipped in 48 hours.

Industry Applications

Construction Machinery
Compact Four Point Contact Ball Slewing Bearings enable smooth rotation in tower crane jibs, handling axial loads up to 2,000 kN.

Metallurgy & Mining
High-temperature-resistant designs prevent deformation in ladle turrets and rotary kilns.

Renewable Energy
Low-maintenance bearings for solar trackers and wind turbine nacelles, featuring corrosion-resistant coatings.

Port Machinery
Impact-resistant models with IP67 sealing endure saltwater exposure and shock loads in container cranes.

Quality & Customization Process

  • Requirement Analysis: Validation via 3D modeling and FEA simulation.
  • Prototyping: Optional sample production for performance testing.
  • Batch Production: Modular manufacturing cuts lead times by 30%.
  • Quality Control: Ultrasonic testing, grinding accuracy (±0.01mm) checks, and final noise/waterproof testing.

FAQs

Q: How do your bearings handle 500°C environments?
A: We use 42CrMo steel with ceramic-coated cages and specialized heat treatment.

Q: Can you make bearings larger than φ3000mm?
A: Yes! Our modular process enables custom large-diameter slewing bearings up to φ5000mm.

Q: What certifications do you offer?
A: All bearings meet ISO 9001, CE, and industry-specific standards (ATEX, DNV-GL).

Q: How fast can you deliver non-standard orders?
A: Most custom designs ship in 15–20 days with priority handling.

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