Slewing Ring Roballo Cross Crane Excavator Drive Bearings with Dual Axis Ring Single Arm Boat Motor Swivel Driver Transmission Part
A slewing bearing or slewing ring is a rotational rolling-element bearing that typically supports a heavy but slow-turning or slow-oscillating load, often a horizontal platform such as a conventional crane, a swing yarder, or the wind-facing platform of a horizontal-axis windmill.
* Series E01-Single Row Ball Slewing Bearing
* Series EPS-Single Row Ball Slewing Bearing
* Series EQ-Single Row Ball Slewing Bearing
* Series E11-Single Row Cross Roller Slewing Bearing
* Series EHJ-Single Row Cross Roller Slewing Bearing
* Series E02-Double Row Ball Slewing Bearing
* Series E13-Three Row Roller Slewing Bearing
* Series Thin-Light Type Slewing Bearing
* Series Flange-Light Type Slewing Bearing
Also we make
Double row ball contact slewing ring bearing without gear
Double row ball contact slewing ring bearing with an internal gear
Double row ball contact slewing ring bearing with an external gear
Double row crossed roller slewing ring bearing without a gear
Double row crossed roller slewing ring bearing with an internal gear
Double row crossed roller slewing ring bearing with an external gear
Slewing ring bearings, also known as slewing rings or turntable bearings, are large-diameter rolling-element bearings designed to handle heavy, slow-turning, or slowly-oscillating loads. Their unique construction allows them to support significant axial, radial, and overturning moment loads simultaneously, making them a crucial component in many heavy-duty rotational applications.
Advantages of Slewing Ring Bearings:
- Combined Load Capacity: Unlike conventional bearings that typically handle either axial or radial loads, slewing ring bearings are engineered to accommodate complex load combinations, including axial (thrust), radial, and tilting moment loads concurrently. This versatility simplifies design and reduces the need for multiple bearing types.
- Space Efficiency and Compactness: Slewing rings often replace complex arrangements of multiple bearings and structural components. Their design allows for a large hollow center, which can be used to pass hydraulic lines, electrical cables, or other components, leading to a much more compact and streamlined machine design.
- Shaftless Design: A key benefit is their ability to function without a central shaft or spindle. This "shaftless" design opens up the center of rotation, providing valuable space for various operational components, drive mechanisms, or even human access.
- Integrated Gearing: Many slewing ring bearings come with integral gear teeth (either on the inner or outer ring), simplifying the drive system. This eliminates the need for a separate gear assembly, reducing parts, manufacturing complexity, and assembly time.
- High Stiffness and Precision: Despite their large size, slewing rings are designed to provide high rigidity and stiffness. This ensures precise rotational movements, critical for applications requiring accurate positioning and stability under load.
- Durability and Longevity: Built for heavy-duty applications, slewing ring bearings are constructed from robust materials and designed for extended service life, even in demanding and harsh operating environments.
- Simplified Assembly and Maintenance: By consolidating multiple functions into a single component, slewing rings can simplify the overall assembly process of machines. While maintenance is still required, the design often allows for easier lubrication and inspection.
- 360-Degree Rotation: They facilitate continuous 360-degree rotation, which is essential for machines like cranes, excavators, and wind turbines.
Applications of Slewing Ring Bearings:
Slewing ring bearings are indispensable in a wide array of industries and machinery, particularly those requiring heavy-duty rotation and precise positioning:
- Construction Equipment:
- Cranes (Tower Cranes, Mobile Cranes, Gantry Cranes): Crucial for the rotation of the boom and superstructure.
- Excavators and Earthmovers: Enable the 360-degree rotation of the upper cabin and boom.
- Drilling Rigs: For rotating the drill mast.
- Concrete Pumps: Allowing the boom to articulate and reach different areas.
- Renewable Energy:
- Wind Turbines: Used in the yaw (horizontal rotation of the nacelle to face the wind) and pitch (rotation of the blades) mechanisms.
- Solar Trackers: For precisely positioning solar panels to follow the sun's path throughout the day.
- Heavy Industry and Mining:
- Steel Mills (Ladle Turrets, Casting Machines): Handling extremely heavy and hot loads.
- Mining Excavators and Stackers/Reclaimers: For large-scale material handling.
- Tunnel Boring Machines.
- Port and Marine Equipment:
- Ship Deck Cranes and Offshore Cranes: For handling cargo on vessels and offshore platforms.
- Port Cranes (Container Cranes, Gantry Cranes): For loading and unloading cargo.
- Aerospace and Defense:
- Radar Systems and Antennas: For precise rotational positioning and tracking.
- Aircraft Landing Gear.
- Medical Equipment:
- CT Scanners and X-ray Machines: For precise rotation of the imaging components around the patient.
- Robotic Surgical Devices: Requiring controlled multi-axis movement.
- Robotics and Automation:
- Industrial Robots: In joints where heavy loads need to be precisely rotated.
- Automated Material Handling Systems.
- Amusement Rides: For the rotational movements of ferris wheels, roller coasters, and other rides.
- Railway Vehicles: In some specialized railway cranes or maintenance vehicles.
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Slewing Ring Roballo Cross Crane Excavator Drive Bearings with Dual Axis Ring Single Arm Boat Motor Swivel Driver Transmission Part
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