High-Capacity Large Axial Load Bearings for Heavy-Duty Industrial Applications
Product Overview
At ZZ, we understand that the stability of your heavy machinery relies on the precision of its core components. Our Large Axial Load Bearings (often categorized as Slewing Bearings or Turntable Bearings) are engineered to withstand extreme operational stresses. Unlike standard bearings, these heavy-duty units are designed to simultaneously support massive axial forces, radial loads, and tilting moments.
Whether for offshore cranes or wind energy infrastructure, ZZ bearings act as the critical "joints" of your machinery, ensuring smooth rotation under high pressure. Our advanced manufacturing processes ensure that every bearing delivers superior rigidity and longevity in the most demanding environments.
Performance and Quality
Our commitment to quality is embedded in every stage of the manufacturing process. We utilize high-strength alloy steel and advanced heat treatment technologies to ensure our bearings perform reliably under continuous heavy loading.
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Advanced Material Science: We use premium alloy steel (such as 42CrMo4 and 50Mn) to ensure high toughness and fatigue resistance.
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Precision Hardening: Utilizing medium frequency quenching and induction hardening, our raceways achieve a hardness of HRC 55~62, significantly reducing wear and extending service life.
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Digital Tolerance Control: By employing digital machining centers, we maintain strict geometric tolerances, ensuring the bearing operates with minimal friction and maximum precision.
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Robust Sealing: High-performance rubber seals are integrated to prevent lubricant leakage and protect against dust, water, and industrial contaminants.
Technical Specifications
ZZ offers a wide range of configurations to match specific load requirements. From single-row ball bearings to triple-row roller configurations, we have the solution for your load case.
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Feature
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Specification Details
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Product Type
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Slewing Ring / Large Axial Load Bearing
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Bore Diameter
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200mm – 10,000mm+ (Customizable)
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Load Capacity
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High Capacity for Axial, Radial & Moment Loads
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Material
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42CrMo4, 50Mn, 100Cr6, or Custom Alloy
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Hardness
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Raceway: HRC 55-62; Teeth: HRC 50-55
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Sealing
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NBR / Fluororubber (IP67 Rated options)
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Lubrication
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Grease (Standard) or Oil Bath
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Accuracy Class
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P6, P5, P4 (DIN 628)
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Certifications and Standards
Quality assurance is paramount at ZZ. Our large axial load bearings are manufactured in compliance with international standards to guarantee safety and interoperability.
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ISO 9001:2015: Certified Quality Management System.
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DIN / ISO Standards: Manufactured according to DIN 628 and relevant ISO bearing standards.
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CE Certification: Compliant with European safety and health requirements.
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Material Certs: Full EN 10204 3.1 Material Certificates provided for all steel batches.
Product Applications
Our bearings are the backbone of heavy industry. They are specifically designed for applications requiring high rigidity and precise rotation under heavy weights.
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Wind Power Generation: Used in yaw and pitch systems to adjust turbine blades against wind forces.
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Marine & Offshore Cranes: Essential for deck cranes and heavy-lift vessels (e.g., 3500-ton cranes) where safety is critical.
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Construction Machinery: Excavators and crawler cranes rely on our bearings for boom movement.
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Industrial Robotics: High-precision rotary tables and welding manipulators.
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Mining Equipment: Bucket wheel excavators and drilling rigs.
Services
At ZZ, we provide more than just hardware; we provide engineering solutions.
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OEM/ODM Services: We can design and manufacture bearings based on your specific drawings or application requirements.
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Technical Support: Our engineering team assists in selecting the correct bearing type (e.g., Single-row vs. Three-row roller) for your load calculations.
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After-Sales Maintenance: We provide detailed maintenance manuals and supply replacement parts like seals and mounting bolts.
Frequently Asked Questions (FAQ)
Q: What is the difference between a single-row and triple-row large axial load bearing?
A: A single-row ball bearing is lighter and suitable for moderate loads. A triple-row roller bearing uses three independent roller rows to handle extremely high axial and radial loads simultaneously, making it ideal for heavy cranes and wind turbines.
Q: Can you manufacture bearings with external or internal gear teeth?
A: Yes. We can machine external or internal gear teeth directly onto the bearing rings to facilitate driven rotation, ensuring precise synchronization with your motor systems.
Q: What is the lead time for a custom large diameter bearing?
A: Lead times vary based on size and complexity. Standard models may ship within 15-20 days, while large, customized diameters (over 2 meters) typically require 30-45 days for manufacturing and quality testing.
Q: Do you provide lubrication solutions?
A: Yes. Our bearings come pre-lubricated with high-grade grease suitable for standard temperatures. For extreme environments (high heat or cryogenic), we offer specialized lubrication options.
