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Slewing Bearing Used in Port Crane Slewing Ring, Single Row Four-Point Contact, 1200kN Axial Load
Product Spotlights
High load capacity single row four-point contact slewing bearing designed for port crane applications. Supports 1200 kN axial load, compact and lightweight. Customizable dimensions, gear options, and sealing. Manufactured by experienced supplier with global export reach.
US$ 6000
≥1 Combo
Key Specifications
Get Latest Price
Type:
Other, Single Row Four-Point Contact Ball Slewing Bearing
Material:
Other, High-strength alloy steel (customizable)
Axial Load Capacity:
1200 kN
Payment & Shipping
Payment Methods:
Port of Shipment:
qingdao|tianjin
Delivery Detail:
30 days
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Type
Other, Single Row Four-Point Contact Ball Slewing Bearing
Material
Other, High-strength alloy steel (customizable)
Axial Load Capacity
1200 kN
Design
Single row four-point contact
Application
Port crane slewing ring
Outer Diameter
Customizable (upon request)
Inner Diameter
Customizable (upon request)
Mounting Holes
Available (standard or customized)
Gear Option
External / Internal gear optional
Hardness
Raceway hardness HRC 55-62 (typical)
Welcome to Henan San Kuang Machinery Technology Co., Ltd. – a professional manufacturer specializing in high-quality slewing bearings for heavy-duty industrial applications. Our Slewing Bearing Used in Port Crane Slewing Ring, Single Row Four-Point Contact, 1200kN Axial Load is engineered to deliver exceptional reliability and performance under the most demanding operating conditions. With a factory spanning 10,000–30,000 square meters and a dedicated team of 51–100 experienced employees, we have been serving global markets since 2022, exporting to regions including North America, South America, Europe, Southeast Asia, Africa, and Oceania. This product combines advanced design with precise manufacturing to ensure smooth rotation, high load capacity, and long service life for port crane equipment.
The single row four-point contact ball bearing design offers a compact yet robust solution for accommodating axial loads, radial loads, and moment loads simultaneously. With a rated axial load capacity of 1200 kN, this slewing ring is specifically tailored for port crane slewing mechanisms where heavy lifting and continuous rotation are required. Below we detail the key features, technical specifications, and benefits that make this product a top choice for crane OEMs and end-users.
Key Features & Technical Advantages
- Single Row Four-Point Contact Design: Four-point contact ball raceway enables the bearing to handle axial loads from both directions, radial loads, and tilting moments in one compact assembly. This reduces overall height and weight compared to double-row or crossed roller designs.
- High Axial Load Capacity – 1200 kN: Precisely ground raceways and optimized ball complement ensure the bearing can sustain heavy vertical loads typical in port crane operations, such as supporting the superstructure and load.
- Superior Material & Heat Treatment: Raceways and rolling elements are manufactured from high-strength alloy steel, with induction hardening to achieve a raceway hardness of HRC 55–62. This provides excellent wear resistance and fatigue life.
- Customizable Dimensions & Gearing: The outer diameter, inner diameter, and overall height can be tailored to match specific crane mounting interfaces. Both internal and external gear options are available for integrated rotation drive systems.
- Mounting Hole Pattern Flexibility: Through-holes or threaded holes can be arranged according to customer drawings or standard patterns, facilitating easy installation with bolts.
- Sealing Options: Standard rubber seals (e.g., nitrile or polyurethane) protect the raceway from dust, moisture, and debris. High-temperature or chemical-resistant seals are available upon request.
- Lubrication System: Grease nipples and lubrication grooves are integrated for convenient maintenance, ensuring low friction and long operational intervals.
- Rigorous Quality Control: Each bearing undergoes dimensional inspection, rotational torque testing, and load simulation to ensure consistent performance.
| Parameter | Value / Range |
|---|---|
| Rated Axial Load (Static) | 1200 kN |
| Rated Radial Load (Static) | Up to 800 kN (depending on geometry) |
| Rated Tilting Moment (Static) | Up to 600 kN·m (customizable) |
| Outer Diameter Range | 500 mm – 4000 mm (or as required) |
| Rolling Element Diameter | Customized to load requirements |
| Raceway Hardness | HRC 55 – 62 |
| Tolerance Grade | P0, P6, P5 (ISO 492) – custom precision available |
| Gear Module (if gear requested) | Module 4 – 20 (external or internal) |
| Operating Temperature Range | -30°C to +80°C (extended range optional) |
Customer Benefits
- Space & Weight Savings: Single row design reduces the overall slewing ring height, allowing crane designers to minimize material usage and reduce deadweight.
- Enhanced Durability: The four-point contact geometry distributes loads evenly across multiple rolling elements, extending bearing life even under shock loads and misalignment.
- Low Maintenance: Integrated lubrication points and seal protection reduce the frequency of regreasing and prevent contamination ingress, lowering downtime.
- Easy Integration: Customizable mounting hole patterns and gear configurations allow direct replacement or new installation with minimal modification.
- Cost-Effective: Compared to multi-row or cross-roller alternatives, the single row four-point contact design offers a competitive price/performance ratio without compromising load capacity.
- Global Compatibility: Our bearings are designed to meet international standards and can be supplied with documentation for CE, ISO, or other required certifications (subject to customer request).
Trusted Manufacturing Backed by Solid Data
Henan San Kuang Machinery Technology Co., Ltd. operates a modern facility covering 10,000–30,000 square meters located in Luoyang, Henan – a renowned bearing manufacturing hub in China. With an annual export value exceeding US$2.5 million and a team of 51–100 skilled professionals, we have established strong supply chains to ports including Shanghai, Lianyungang, Qingdao, and Tianjin, ensuring timely delivery worldwide. Our bearings are used in port cranes across North America, Europe, Southeast Asia, Africa, and Oceania, among others. Every slewing ring is manufactured with traceable quality records and undergoes simulation testing before shipment. We invite you to contact us for technical consultation, quotation, or custom design support. Choose San Kuang for reliability that keeps your port operations moving.
Frequently Asked Questions (FAQ)
-
Q: What is the difference between single row four-point contact and crossed roller slewing bearings?
A: Single row four-point contact bearings use ball rolling elements with a curved raceway that contacts the ball at four points, allowing them to handle axial loads in both directions, radial loads, and moment loads in a compact design. Crossed roller bearings have cylindrical rollers arranged orthogonally and offer higher rigidity and precision, but are typically larger and heavier. For port crane applications with moderate rigidity needs, the four-point contact design is cost-effective and adequate. -
Q: Can you provide the bearing with a gear integrated?
A: Yes, we can manufacture the slewing ring with either external or internal gear teeth. The gear module, number of teeth, and tooth profile are customized per your requirements. Please provide your design specifications or a drawing. -
Q: What is the lead time for a standard or custom slewing bearing?
A: For standard sizes (common dimensions), lead time is typically 15–25 working days. For fully custom designs, it ranges from 30–45 working days, depending on complexity and order quantity. We also offer express production upon request. -
Q: Is the 1200 kN axial load capacity static or dynamic?
A: The 1200 kN value refers to the static axial load capacity (C0a). Dynamic load capacity (Ca) is lower and depends on rotational speed and life requirements. We can provide dynamic load ratings and calculate bearing life based on your operating conditions. -
Q: What warranty do you offer on your slewing bearings?
A: We provide a 12-month warranty from the date of shipment, covering manufacturing defects under normal usage conditions. Extended warranties are negotiable. -
Q: Can I request a material certificate or traceability report?
A: Yes, we can provide material certificates (mill test reports) for steel, as well as dimensional inspection reports and hardness test reports. These are available upon request at no extra charge for standard orders. -
Q: How should the bearing be lubricated and maintained?
A: The bearing is supplied with a lithium-based grease. We recommend regreasing every 6 months or 500 operating hours, whichever comes first. Grease nipples are provided on the outer ring; simply inject fresh grease until old grease exits the seal. Periodic inspection of seal condition and bolt tightening torque is advised. -
Q: Do you have stock items or only made-to-order?
A: We maintain a limited stock of popular sizes and materials. For the 1200 kN capacity port crane bearing, it is typically made-to-order to match the specific crane model, but we can also stock standard dimensions if requested in volume.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2022
Factory Size
10,000-30,000 square meters
Annual Export Value
US$2.5 Million - US$5 Million
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