High-Performance Backhoe Slewing Ring for Demanding Excavation Applications
As a leading professional manufacturer, ZZ understands that the backhoe slewing ring is the critical pivot point for any excavator or backhoe loader. It is the component responsible for supporting the entire upper structure's weight while enabling smooth 360-degree rotation under heavy dynamic loads. Our slewing rings are engineered to replace original equipment manufacturer parts seamlessly, ensuring your machinery maintains peak operational efficiency and stability in the toughest working environments.
Product Performance & Quality Assurance
At ZZ, we manufacture our backhoe slewing rings using premium-grade steel, such as 50Mn and 42CrMo, to ensure superior durability and resistance to wear. The performance of our slewing bearings is defined by several key factors:
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Robust Heat Treatment: The raceways undergo precise surface induction hardening, achieving a hardness level of HRC 55-62. This ensures the raceways can withstand high-impact loads and prevents premature deformation.
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Precision Gearing: Our internal or external gears are heat-treated (normalized or quenched to HRC 50-60) to prevent tooth breakage and ensure smooth power transmission from the hydraulic motor.
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Superior Sealing: We utilize high-quality rubber seals (often multi-stage) to retain grease and exclude contaminants like mud, dust, and water, significantly extending the service life of the bearing.
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Load Capacity: Designed to simultaneously withstand large axial forces, radial forces, and tilting moments, making them ideal for the erratic loading conditions typical of backhoe operations.
Technical Specifications
While we offer custom manufacturing based on specific drawings, our backhoe slewing rings generally adhere to the following structural standards. We specialize in Single Row Four-Point Contact Ball and Double Row Ball series, which are most common for excavators.
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Parameter
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Specification Details
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Product Name
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Backhoe Slewing Ring / Excavator Swing Circle
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Material
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50Mn, 42CrMo, S48C (High-Strength Alloy Steel)
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Gear Type
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External Teeth or Internal Teeth (Precision Machined)
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Hardness (Raceway)
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HRC 55-62 (Induction Hardened)
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Hardness (Gear)
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HRC 50-60 (Optional Quenching)
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Sealing
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High-performance Rubber Seals / Labyrinth Seals
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Lubrication
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Grease Fittings (Zerk fittings) provided for easy maintenance
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Mounting
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Bolt holes drilled and tapped according to OEM standards
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Certifications & Standards
Quality is not just a promise; it is a documented standard at ZZ. Our manufacturing processes and final products comply with rigorous international standards to ensure safety and reliability.
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ISO 9001: Certified Quality Management System.
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JB/T 2300-2011: We strictly adhere to the mechanical industry standards for slewing bearings.
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CE Compliance: Our products meet the necessary safety and health requirements for the European market.
ZZ Product Services
We don't just sell bearings; we provide solutions.
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OEM & ODM: We can manufacture slewing rings based on your specific blueprints or samples, matching any major brand (e.g., Caterpillar, Komatsu, Volvo, JCB).
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Technical Support: Our engineering team provides pre-sales consultation to help you select the right bearing configuration for your specific backhoe model.
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Global Logistics: We offer secure, weather-resistant packaging and reliable shipping methods to deliver your parts anywhere in the world.
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Warranty: We stand behind our manufacturing quality with a comprehensive warranty policy.
Applications
The versatility of our slewing rings extends beyond standard backhoes. They are widely used in:
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Excavators & Backhoe Loaders: The primary application for swing motion.
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Crawler Cranes: Supporting heavy lifting operations.
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Mining Machinery: Operating in high-dust and high-vibration environments.
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Port Machinery: Container handlers and reach stackers.
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Tunnel Boring Machines: Where precision rotation is vital.
Frequently Asked Questions (FAQ)
Q1: How do I identify the correct backhoe slewing ring for my machine?
To identify the correct part, you should look for the part number stamped on the side of the existing ring. If the stamp is illegible, please provide the machine model, year of manufacture, and the number of gear teeth, along with the bolt hole pattern dimensions.
Q2: What is the difference between an internal gear and an external gear slewing ring?
An internal gear ring has teeth on the inside diameter, which offers better protection from debris and requires less space. An external gear ring has teeth on the outside, which is easier to inspect and often allows for a larger pitch circle diameter, providing better torque transmission.
Q3: What is the lead time for a replacement slewing ring?
For standard models, we often have stock available for immediate shipment. For custom or non-standard manufacturing, the typical lead time is 30-45 days depending on the quantity and complexity.
Q4: Do you provide installation support?
Yes. We provide detailed installation manuals. Proper installation, including correct bolt torque and gear backlash adjustment, is crucial for the longevity of the slewing ring.
Q5: Can ZZ manufacture a slewing ring if I only have a damaged sample?
Yes, we have the capability to reverse-engineer and manufacture high-precision slewing rings based on physical samples. Please contact our sales team for details on sample submission.
