Slewing Bearings
Slewing bearings—also known as turntable bearings—typically fall into the category of large-scale bearings. Characterized by their substantial dimensions, high precision, and compact structure, they are frequently deployed in low-speed, heavy-load operating environments, where they are capable of simultaneously withstanding axial, radial, and overturning moment loads.
Luoyang Hengguan Bearing specializes in the design and manufacture of slewing bearings/turntable bearings with outer diameters ranging from 0.2 to 10 meters. Additionally, the company produces a diverse range of high-precision bearings, large-scale thrust ball bearings, and non-standard mechanical components. Our products span four precision grades—P0, P6, P5, and P4—and encompass various structural types, including single-row four-point contact ball, crossed cylindrical roller, three-row cylindrical roller, double-row ball, combined ball-and-roller, thin-section flanged, and large-scale thrust ball configurations.
Our products are widely utilized across numerous sectors, including new energy, medical equipment, amusement rides, industrial automation, hoisting machinery, construction, mining, metallurgy, port operations, textiles, shipbuilding, environmental protection, aerospace, and wind power generation.
Our products are distributed throughout China and exported to numerous countries and regions across Europe, the Americas, and Asia, earning the widespread acclaim and recognition of our extensive user base.
Four point contact ball slewing bearings
The single row four-point contact ball slewing bearing is composed of two seat rings. It has compact structure, light weight, and four-point contact between steel ball and arc raceway. It can bear axial force, radial force and overturning moment at the same time. The construction machinery of rotary conveyor, welding manipulator, small and medium-sized crane and excavator can be selected.
Single row cross roller slewing bearing
The single row cross roller slewing bearing is composed of two seat rings. It has compact structure, light weight, high manufacturing accuracy, small assembly gap and high requirement for installation accuracy. Rollers are 1:1 cross-arranged. It can bear axial force, overturning moment and large radial force at the same time. It is widely used in lifting transportation, construction machinery and opto-electronicproducts.
Double row ball slewing bearing
The double row ball slewing bearing has three seat rings. The steel balls and isolators can be directly arranged into the upper and lower raceways. According to the stress conditions, the upper and lower rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient. The bearing angle of the upper and lower arc raceway is 75 degrees. It can bear a great deal of axial force and overturning moment. When the radial force is greater than 0.1 times the axial force, the raceway must be specially designed. The axial and radial dimensions of the double row ball slewing bearing are relatively large and the structure is fastened. It is especially suitable for handling tower cranes, truck cranes and other loading machines that require medium or above diameters
Three row roller slewing bearing
Three row roller slewing bearing have three seat rings, the upper and lower raceways and the radial raceways are separated, so that the load of each row of roller can be determined accurately. Being able to bear all kinds of loads at the same time, it is the largest one of the four structural products with large axial and radial dimensions and firm structure. It is especially suitable for heavy machinery requiring larger diameter, such as bucket wheel stacker and reclaimer, wheel crane, marine crane, port crane, ladle turret ,large tonnage truck crane and so on.
Double-Row Same-Diameter Ball Slewing Bearing
It features a three-row raceway structure in which the steel balls in both the upper and lower rows are of identical diameter. Thanks to this standardized configuration, it exhibits exceptional stability when subjected to alternating loads; the dual raceways collectively share the load, ensuring extremely high reliability. Its 75° contact angle enables it to withstand immense axial forces and overturning moments, while offering rotational smoothness superior to that of comparable products. Should the radial load exceed 10% of the axial load, the raceway design requires optimization. Although slightly larger in overall dimensions, its structure remains compact and robust, making it particularly well-suited for medium-to-large-scale heavy-duty equipment—such as tower cranes and port cranes—where high operational smoothness is a critical requirement.
Combined Ball-and-Roller Slewing Bearing
It employs a three-row raceway structure, in which rollers bear immense axial loads, while steel balls provide precise guidance and absorb overturning moments. This division of labor doubles efficiency and yields a load-bearing capacity far exceeding that of purely ball-type designs, while also enabling the system to withstand extremely high radial loads. The structure is robust and shock-resistant; furthermore, through optimized arrangement, it achieves a compact axial profile. The design effectively mitigates wear caused by eccentric loading, thereby ensuring the maintenance of high precision and smooth rotation even under harsh operating conditions. This product is particularly well-suited for ultra-heavy-duty equipment such as bucket-wheel stacker-reclaimers, heavy-duty port cranes, large-tonnage crawler cranes, and Tunnel Boring Machines (TBMs).
APPLICATION SOLUTION
SERVICE AND QUALITY
Design
As a specialized manufacturer of slewing bearings with years of deep-rooted experience in the industry, we offer more than just products; we provide a complete transmission solution tailored specifically to your needs. Addressing unique spatial constraints and extreme operating environments—such as high or low temperatures and highly corrosive conditions—we offer personalized, non-standard customization services. Whether involving specialized modifications to gear parameters or the reinforcement of sealing structures, our design process is engineered to preemptively resolve potential issues, ensuring that our products fit perfectly and deliver long-term durability.
Production
The life of every slewing bearing begins with high-quality forgings. We maintain long-standing partnerships with renowned domestic steel mills; prior to being stocked, all raw materials undergo visual inspections and dimensional measurements by our quality control personnel to ensure they are free of visible defects and possess sufficient machining allowance to be processed into finished products. (Image 1)
• Heat Treatment: CNC medium-frequency induction hardening with precise control over hardening depth. (Images 2 & 3)
• Machining Precision: Utilizing CNC vertical lathes, CNC gear shaping/hobbing machines, and precision grinding machines. (Images 4, 5, & 6)
• Finished Product Showcase: Strict cleanliness control and meticulous surface coating. (Images 7 & 8)
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On-Site Measurement & Mapping
Is your equipment down while you wait for spare parts—facing high costs and long lead times for original imported components, all without even having the technical drawings in hand?
Our technical team offers professional on-site measurement and mapping services. Whether the subject is an excavator, a port crane, or a production line turntable, our engineers will travel directly to your location, fully equipped with the necessary instrumentation. We precisely capture critical data points—including outer diameters, center distances, gear modules, and bolt hole positions. We go beyond mere "replication"; based on the actual wear and tear observed, we implement optimized compensation designs to ensure that the new replacement part is not only more durable but also easier to install than the original component. (On-site photos)、
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After-Sales Service
Beyond Delivery—A Commitment to Enduring Support
We pledge a 24-hour response time for all after-sales inquiries. Whether your equipment is located at a port, a mine, or a construction site, our technical team stands ready to provide a solution at the very first sign of an issue. We offer expert on-site installation guidance and commissioning services, ensuring that every bolt’s preload and every lubrication point are optimized to perfection. (Insert an appealing customer service image here)
Quality Inspection
Comprehensive Parameter Testing: We leave no detail overlooked. From the chemical composition analysis of incoming raw materials to ultrasonic flaw detection during processing, we ensure that every stage is free of defects (Images 1, 2, 3, 4).
Dual Control of Hardness and Precision: Utilizing precision hardness testers and digital measuring instruments, we rigorously inspect the quenching hardness of raceways (measured with HRC precision) and verify machining tolerances, ensuring rock-solid rotational accuracy (Images 5, 6, 7).
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Final Pre-shipment Inspection: Before shipment, every product unit must successfully pass rigorous tests for starting torque, internal clearance, and gear tooth profile verification (Images 8, 9, 10, 11, 12, 13).
Source traceability represents not only our confidence in our quality but also our solemn commitment to earning and maintaining the long-term trust of our customers.
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