A Slewing bearing, also known as a slewing ring, is a rotational rolling-element bearing that typically supports a heavy but slow-turning or slow-oscillating load. These bearings are essential in various heavy machinery and equipment, enabling smooth rotation under significant axial, radial, and moment loads. Common applications include cranes, excavators, wind turbines, and medical equipment, where precise movement and durability are critical.
Our slewing bearings are engineered to meet industry standards, with detailed parameters provided in the table below. These specifications ensure optimal performance for your applications.
| Parameter | Description | Typical Range |
|---|---|---|
| Bore Diameter | Inner diameter of the bearing | 100 mm to 5000 mm |
| Outside Diameter | Outer diameter of the bearing | 150 mm to 6000 mm |
| Height/Width | Overall thickness of the bearing | 30 mm to 300 mm |
| Load Capacity (Axial) | Maximum axial load the bearing can support | Up to 10,000 kN |
| Load Capacity (Radial) | Maximum radial load the bearing can support | Up to 5,000 kN |
| Load Capacity (Moment) | Maximum moment load the bearing can support | Up to 50,000 kNm |
| Gear Type | Type of gear integrated (internal or external) | Internal, External, or Non-geared |
| Material | Primary material used in construction | Carbon Chrome Steel, Stainless Steel |
| Accuracy Class | Precision level of the bearing | P0, P6, P5 (per ISO standards) |
| Operating Temperature | Temperature range for safe operation | -30°C to +120°C |
| Lubrication | Recommended lubrication type and interval | Grease, Oil; Every 100-1000 hours |
Slewing bearings are versatile components used across numerous industries. Some common applications include:
Proper installation and maintenance are crucial for maximizing the lifespan and performance of slewing bearings. Follow these general guidelines:
What is the typical lifespan of a slewing bearing?
The lifespan varies based on application, load, maintenance, and environmental factors. With proper care, slewing bearings can last from 5 to 20 years or more. Regular lubrication and inspections are key to extending service life.
How do I choose the right slewing bearing for my application?
Consider factors such as load type (axial, radial, moment), size constraints, operating speed, environment (e.g., temperature, corrosion), and required precision. Consulting with an engineer or manufacturer can help select the optimal type and specifications.
Can slewing bearings be customized?
Yes, many manufacturers offer customization options for dimensions, gear types, mounting holes, materials, and seals to meet specific application requirements. Provide detailed specifications for accurate customization.
What maintenance is required for slewing bearings?
Regular lubrication is essential to reduce friction and wear. Inspect for contamination, corrosion, and damage periodically. Follow the manufacturer's guidelines for lubrication intervals and types, typically every 100 to 1000 hours of operation.
Are slewing bearings resistant to corrosion?
Standard slewing bearings are made from carbon chrome steel and may require surface treatments or coatings for corrosion resistance. Stainless steel options are available for highly corrosive environments, such as marine applications.
What causes slewing bearing failure?
Common causes include improper installation, overloading, inadequate lubrication, contamination, and environmental factors like moisture or extreme temperatures. Regular maintenance and adherence to load limits can prevent most failures.
Can I repair a damaged slewing bearing?
Minor issues like surface rust or light wear can sometimes be addressed with cleaning and relubrication. However, significant damage often requires replacement, as repairs may compromise integrity and performance.
How are slewing bearings different from standard bearings?
Slewing bearings are designed to handle combined loads (axial, radial, moment) and facilitate rotation in heavy equipment, whereas standard bearings typically support simpler load types and are used in lighter applications. Slewing bearings also often include integrated gears and larger sizes.
What industries commonly use slewing bearings?
They are widely used in construction, renewable energy (e.g., wind turbines), medical devices, industrial machinery, robotics, aerospace, and defense industries due to their versatility and load-handling capabilities.
Do slewing bearings require special installation tools?
While basic tools like hoists and alignment devices are often sufficient, large or precision bearings may require specialized equipment for proper handling and mounting to avoid damage. Always follow the manufacturer's installation instructions.
