134.25.560 Cross Roller Slewing Bearing for Construction Machinery

Welcome to our trade page! We are a professional manufacturer and supplier of high-quality slewing bearings, also known as slewing rings or turntable bearings, which are widely recognized as the "joints of machines" in various industrial fields . Our products are engineered to meet the strict demands of global customers, with reliable performance, excellent durability and competitive pricing, making them ideal for both standard and custom applications.

A slewing bearing is a specialized rotational rolling-element bearing designed to support heavy, slow-turning or slowly-oscillating combined loads, including large axial loads, radial loads and overturning moments simultaneously . Unlike standard bearings, our slewing bearings are typically wide in structure, equipped with mounting holes, internal/external gears (optional), lubrication holes and high-performance sealing devices, which help simplify the host design, reduce installation complexity and facilitate daily maintenance . Available in sizes ranging from 100mm to over 15,000mm in diameter, large-sized slewing bearings can be segmented for easy transportation and handling .

We offer a full range of slewing bearing series to meet diverse application needs, each with unique structural advantages:

• Single Row Four-Point Contact Ball Slewing Bearing: Compact structure, light weight, with four contact points between steel balls and arc raceways. It can bear axial force, radial force and overturning moment simultaneously, suitable for medium-light load equipment such as small cranes, excavators and rotary conveyors .
• Double Row Angular Contact Ball Slewing Bearing: Equipped with three raceways and two rows of steel balls with different diameters, featuring high structural rigidity and strong load-bearing capacity. It is ideal for tower cranes, automobile cranes and other loading and unloading machinery that require medium to large diameters .
• Single Row Cross Roller Slewing Bearing: Composed of two raceways, with cylindrical rollers arranged in a 1:1 cross pattern. It has high manufacturing precision, small assembly clearance and strong rigidity, suitable for high-precision equipment such as industrial robots, radar antennas and CNC rotary tables .
• Three-Row Cylindrical Roller Slewing Bearing: The most load-bearing type among all series, with three separate raceways for axial, radial and moment loads respectively. It has large axial and radial dimensions, strong structural stability, widely used in heavy-duty machinery such as bucket wheel excavators, offshore cranes and tunnel boring machines (TBM) .

• Superior Load-Bearing Capacity: Adopting optimized raceway and rolling element design, made of high-carbon chromium steel with vacuum degassing treatment, ensuring excellent static and dynamic load-bearing performance, even under extreme working conditions .
• High Precision & Stability: Precision grinding technology is applied to achieve a surface roughness of Ra 0.2μm or better, with adjustable axial clearance (0.02-0.05mm), ensuring smooth rotation and accurate positioning .
• Long Service Life: Equipped with advanced sealing devices to prevent dust, moisture and pollutants from entering; surface quenching and grinding treatment enhance wear resistance and fatigue resistance, extending the service life to over 30,000 hours .
• Compact Design & Easy Installation: Integrated structure saves installation space, simplifies the host design; modular design and standard mounting holes make installation and maintenance more convenient, reducing labor costs .
• Strong Environmental Adaptability: Optional anti-rust coatings (galvanizing, painting) and special sealing systems, enabling stable operation in high temperature, low temperature, humidity, corrosion and other harsh environments such as marine engineering and mining sites .
• Customization Service: We can customize slewing bearings according to your specific requirements, including size, material, gear type, sealing method and load capacity, to perfectly match your equipment and working conditions .

Our slewing bearings are widely used in various industries, providing reliable rotational support for numerous mechanical equipment:

• Construction Machinery: Excavators, cranes, concrete pump trucks, road rollers, tower cranes
• Port & Marine Machinery: Container cranes, ship cranes, offshore platforms, marine pods
• Energy Industry: Wind turbines, solar trackers, hydropower equipment
• Heavy Industry: Tunnel boring machines (TBM), ladle turrets, stacker reclaimers
• Precision Equipment: Industrial robots, CNC machine tools, medical imaging equipment (CT scanners)
• Other Fields: Radar antenna seats, missile launchers, rotating restaurants, amusement rides