Introduction
Engineered for maximum durability and rotational precision, the ZZ 1500mm diameter slewing bearing is a high-performance solution designed for demanding industrial machinery. As a leading manufacturer of slewing bearings, ZZ delivers custom-engineered rotary support systems that combine superior load capacity, extended service life, and seamless integration across diverse applications. This three-row roller type slewing ring is optimized for heavy-duty use in construction, renewable energy, marine, and material handling equipment where reliability under extreme loads is non-negotiable.
Product Performance & Quality
The ZZ 1500mm slewing bearing exemplifies advanced engineering and precision manufacturing. Constructed with high-strength alloy steel (50Mn), the raceway undergoes medium-frequency induction hardening to achieve a surface hardness of HRC 55–62, ensuring excellent wear resistance and fatigue life. Our proprietary heat treatment process enhances core toughness while maintaining surface hardness, allowing the bearing to endure prolonged cyclic loading without deformation.
Precision-ground raceways and strict tolerance control (ISO P0 standard, with optional P6) guarantee smooth rotation and minimal friction torque. The three-row roller design separates axial, radial, and moment load paths, enabling the bearing to handle combined loads up to 20,000 kN·m—ideal for large-scale rotating platforms. All components are manufactured in-house using CNC-controlled machining centers, ensuring batch consistency and long-term performance stability.
Our sealing system features dual-lip NBR rubber seals resistant to oil, dust, and moisture, significantly reducing contamination risks and maintenance frequency. Lubrication is optimized through strategically placed grease inlets, ensuring even distribution across all rolling elements.
Technical Specifications
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Parameter
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Specification
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Outer Diameter
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1500 mm
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Type
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Three-Row Cylindrical Roller Slewing Bearing
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Load Capacity (Axial)
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Up to 8,000 kN
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Load Capacity (Radial)
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Up to 3,500 kN
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Moment Load Capacity
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Up to 20,000 kN·m
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Gear Type
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Internal or External (Modulus: m6–m12, customizable)
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Rolling Element
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Cylindrical Rollers (GCr15 / GCr15SiMn)
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Cage Material
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20# Steel / Polyamide 1010 (segmented)
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Race Ring Material
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50Mn (alternative: 42CrMo upon request)
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Hardness (Raceway)
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HRC 55–62
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Precision Class
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ISO P0 (P6 available)
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Sealing Type
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Double-lip NBR Rubber Seals
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Lubrication Method
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Grease (via integrated grease nipples)
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Mounting Configuration
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Horizontal, Vertical, or Flange Mount
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Customization Options
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Preload adjustment, special coatings, sensor integration
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Certification Standards
All ZZ slewing bearings are manufactured in compliance with international quality and safety standards. This 1500mm model meets or exceeds the following certifications:
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ISO 9001:2015 – Quality Management System (certified at Tianjin and European facilities)
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ISO 14001 – Environmental Management
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ISO 50001 – Energy Management
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CE Marking – Conformity with EU machinery directives
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DNV-GL, ABS, LR, BV Type Approval – Available upon request for marine and offshore applications
Our production process follows strict documentation and traceability protocols, with full material test reports (MTRs) and 100% dimensional inspection available for critical projects.
Product Services
ZZ offers a comprehensive suite of value-added services to support global clients:
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Custom Design & Engineering: Tailored modifications for load profile, speed, temperature, or environmental conditions
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Finite Element Analysis (FEA): Structural simulation to validate performance under real-world loads
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Prototyping & Testing: Functional testing including load cycling, torque measurement, and leak detection
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On-Site Installation Support: Technical supervision and alignment guidance
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After-Sales Maintenance Kits: Complete seal, lubricant, and hardware packages
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Extended Warranty Programs: Up to 36 months based on application and operating conditions
We also provide digital product documentation, including 3D CAD models (STEP, IGES, Parasolid), installation manuals, and torque specifications.
Product Applications
The 1500mm diameter ZZ slewing bearing is deployed across industries requiring robust rotational support:
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Wind Energy: Main shaft support and yaw systems in multi-megawatt turbines
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Construction Equipment: Tower cranes, mobile cranes, and drilling rigs
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Marine & Offshore: Ship cranes, offshore lifting systems, and ROV handling platforms
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Material Handling: Stackers, reclaimers, and portal cranes in bulk terminals
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Mining Machinery: Large excavators, draglines, and bucket-wheel reclaimers
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Industrial Automation: Heavy-duty turntables and robotic bases
Its modular design allows integration with slewing drives, hydraulic motors, or electric drives, making it adaptable to both new builds and retrofits.
FAQ (Frequently Asked Questions)
Q1: What makes the three-row roller design better than single-row ball types?
A: The three-row roller configuration independently supports axial, radial, and moment loads, offering up to 2.5x higher load capacity than single-row four-point contact ball bearings. It is ideal for static or slow-rotating applications with heavy, complex loading.
Q2: Can this bearing be supplied with a gear?
A: Yes. We offer internal or external gear teeth with modulus ranging from m6 to m12. Gear profiles can be standard involute or modified for quieter operation and longer mesh life.
Q3: Is customization available for extreme environments?
A: Absolutely. We offer stainless steel variants, ceramic-coated raceways, high-temperature seals (-40°C to +120°C), and integrated temperature or vibration sensors for predictive maintenance.
Q4: What is the typical lead time for a 1500mm slewing bearing?
A: Standard delivery is 6–8 weeks from order confirmation. Expedited production (4 weeks) is available for urgent projects.
Q5: Do you support OEM branding?
A: Yes. We provide private labeling, custom packaging, and technical documentation under your brand name.
Q6: How does ZZ ensure long service life?
A: Through precision manufacturing, high-purity steel, controlled heat treatment, and optimized internal geometry. Our bearings typically exceed L10 life expectations by 30–50% in field applications.
