Heavy-Duty Slewing Bearing for Mobile Cranes | High-Precision Rotation Solutions
Introduction: The Core of Lifting Stability
As a professional manufacturer specializing in rotary solutions, we understand that the slewing bearing is the critical "joint" of any mobile crane. Our mobile crane slewing bearings are engineered to deliver exceptional rotational accuracy and stability under extreme working conditions.
Designed to support heavy axial loads, radial forces, and tilting moments simultaneously, our bearings ensure that your cranes—from rough terrain to all-terrain models—operate with maximum safety and efficiency. We replace standard OEM specifications with high-performance alternatives that extend service life and reduce maintenance costs.
Product Performance and Quality
Our manufacturing philosophy centers on durability and precision. The mobile crane slewing bearing is constructed using premium alloy steel (such as 42CrMo or 50Mn), subjected to rigorous heat treatment to achieve a hardness depth that resists deformation.
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High Load Capacity: Optimized raceway design (Four-point contact ball or Crossed Roller) ensures the bearing can handle complex composite loads during high-altitude lifting operations.
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Precision Rotation: Advanced grinding processes guarantee low friction and smooth rotation, allowing for precise load positioning even at low speeds.
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Robust Sealing: Equipped with multi-layer rubber or polyurethane sealing strips, our bearings effectively prevent dust, water, and debris ingress, making them ideal for harsh construction sites.
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Integrated Gearing: High-precision external or internal teeth are induction hardened to resist wear, ensuring seamless meshing with the crane's drive mechanism.
Technical Specifications
We offer a wide range of standard sizes and custom designs. Below is a representative specification table for our mobile crane series:
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Parameter
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Specification Details
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Bearing Type
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Four-Point Contact Ball / Crossed Roller / Three-Row Roller
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Material
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42CrMo / 50Mn / 100CrMn6 (DIN Standard)
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Teeth Type
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External Teeth / Internal Teeth / Gearless
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Hardness
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Raceway: 55-62 HRC / Teeth: 50-55 HRC
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Sealing
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Double-row Lip Seal / Labyrinth Seal (IP67 Rated)
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Lubrication
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Grease with standard fittings (M6/M8/M10)
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Accuracy Class
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P6 / P5 / SP (Special Precision)
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Mounting
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Through-holes or Tapped holes (ISO/DIN Standards)
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Certifications and Standards
Quality is not just a promise; it is a documented standard. Our production facility adheres to international quality management systems to ensure every unit meets global safety requirements.
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ISO 9001: Certified Quality Management System.
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JB/T 2300-2011: Manufactured in strict accordance with Chinese Machinery Industry Standards.
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DIN / ISO: Dimensional tolerances comply with international norms.
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Material Certificates: Full EN 10204 3.1 Material Test Reports are provided for traceability.
Product Service and Support
We go beyond manufacturing to provide a comprehensive service ecosystem for our partners.
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OEM/ODM Customization: We can design bearings based on your specific crane drawings or reverse-engineer obsolete parts.
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Technical Consultation: Our engineering team assists in selecting the correct bearing type (e.g., light series vs. heavy series) based on your crane's load chart.
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Rapid Prototyping: Fast sampling for new models to minimize your development time.
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After-Sales Warranty: We provide a standard 12-month warranty and lifetime technical support for installation and maintenance queries.
Applications
Our slewing bearings are the preferred choice for a variety of mobile lifting equipment:
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All-Terrain Cranes: Requiring high precision and speed.
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Rough Terrain Cranes: Demanding high durability and sealing against dust.
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Truck-Mounted Cranes: Needing compact design and lightweight solutions.
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Crawler Cranes: Requiring massive load capacity and stability.
Frequently Asked Questions (FAQ)
Q1: How do I identify the correct slewing bearing for my mobile crane?
A: You can identify the bearing by checking the part number engraved on the ring, measuring the bolt hole center distance (PCD), and counting the number of teeth. If the bearing is damaged, we can help identify it based on dimensions.
Q2: What is the difference between a Four-Point Contact Ball bearing and a Crossed Roller bearing for cranes?
A: Four-point contact ball bearings are generally used for lighter to medium loads and higher speeds. Crossed Roller bearings offer higher rigidity and load capacity for heavier cranes but may operate at slightly lower speeds.
Q3: Do you provide gear cutting services?
A: Yes, we have in-house gear hobbing and shaping capabilities. We can produce spur gears with various pressure angles (20°, 15°, etc.) and modules according to your requirements.
Q4: What is your lead time?
A: For standard models, our lead time is typically 15-25 days. For custom or large-diameter bearings, it may take 30-45 days depending on the complexity.
