NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
A Double-Row Slewing Bearing is a large-sized, heavy-duty precision bearing that adopts a symmetrical layout of double-row rolling elements (usually double-row ball or double-row roller structure). Its inner and outer rings integrate mounting holes and gear rings (with optional internal or external teeth), and it can simultaneously bear axial loads, radial loads, and ultra-large overturning moments. It is a core component of the slewing bearing drive system in heavy-duty equipment.
As an experienced slewing bearing manufacturer, NEWBEE Transmission’s Double-Row Slewing Bearings, relying on the collaborative load-bearing design of double-row rolling elements, have a 50% higher load-carrying capacity than single-row slewing bearings under the same installation space. Moreover, by optimizing the slewing bearing seal structure, they are suitable for harsh environments such as high dust and high humidity. As a high-quality representative in the slewing bearing China manufacturing field, they are widely used in heavy machinery with strict requirements for heavy-load stability and transmission accuracy.
1. Superior Composite Load-Bearing Capacity: The staggered layout of double-row rolling elements in Double-Row Slewing Bearings can simultaneously bear bidirectional axial loads (up to 5×10⁵kN), radial loads, and overturning moments (up to 10⁶N·m). A single set of bearings can replace the combination of multiple single-row bearings, greatly simplifying the structure of the slewing bearing drive system. As a professional slewing bearing manufacturer, NEWBEE Transmission increases the rated dynamic load of the product by an additional 15% by adjusting the rolling element diameter and row spacing.
2. High Structural Stability: Made of 42CrMo alloy structural steel through integral forging, Double-Row Slewing Bearings undergo integral quenching (raceway hardness HRC 58-62) and precision grinding of raceways, with their deformation resistance 30% higher than that of ordinary cast steel bearings. The gear ring part undergoes carburizing and quenching (carburized layer depth 3-6mm), ensuring no wear or plastic deformation on the tooth surface during the slewing bearing drive process.
3. Precise Transmission Performance: The gear ring meshing accuracy of Double-Row Slewing Bearings reaches GB Class 5 (equivalent to ISO Class 5), and the backlash of the slewing bearing drive is controlled within 0.1-0.25mm, making them suitable for high-precision servo drive systems. Thanks to NEWBEE Transmission’s precision machining process, the radial runout of the raceway is ≤0.05mm, ensuring no jamming and low vibration during the slewing bearing drive process.
4. Reliable Sealing Protection: Double-Row Slewing Bearings adopt an innovative combined slewing bearing seal design of "double-lip skeleton oil seal + labyrinth dust cover", which can resist erosion from dust, muddy water, salt spray, etc., with a protection level of IP65. As a leading enterprise in slewing bearing China, NEWBEE Transmission can also customize fluororubber slewing bearing seals according to requirements, suitable for extreme temperatures ranging from -40℃ to 120℃.
5. Modularity and Customization: Double-Row Slewing Bearings support multiple installation methods such as flange connection and bolt fixing, and the inner and outer rings can integrate sensor mounting holes (used to monitor the speed and temperature of the slewing bearing drive). As an experienced slewing bearing manufacturer, NEWBEE Transmission can provide customized solutions such as toothless structures, lightweight outer rings, or special lubrication channels.
With the advantages of double-row load-bearing and stable transmission, combined with the weather resistance of the slewing bearing seal, Double-Row Slewing Bearings are widely used in the following fields:
Construction Machinery: Turntables of truck cranes and upper body rotating mechanisms of crawler excavators. The double-row rolling element design of Double-Row Slewing Bearings ensures no deviation of the slewing bearing drive during heavy-load hoisting, and the slewing bearing seal resists construction site dust and muddy water.
New Energy Equipment: Yaw/pitch systems of wind turbines and photovoltaic tracking brackets. NEWBEE Transmission’s Double-Row Slewing Bearings enhance the slewing bearing seal to prevent sand and dust, adapting to complex outdoor climates and ensuring continuous operation of the slewing bearing drive.
Port Machinery: Rotating platforms of container quay cranes and slewing mechanisms of stackers and reclaimers. Double-Row Slewing Bearings can bear instantaneous impact loads, and the high precision of the slewing bearing drive ensures accurate container positioning, which is a typical application of slewing bearing China in the port field.
Heavy Mining Machinery: Slewing platforms of mining excavators and rotating frames of crushing equipment. The high rigidity of Double-Row Slewing Bearings and wear-resistant slewing bearing seals adapt to high-dust and high-impact working conditions in mines.
Medical and Military Industries: Treatment beds of large radiotherapy equipment and radar antenna bases. The low-vibration slewing bearing drive of Double-Row Slewing Bearings ensures precise operations, and the anti-pollution design of the slewing bearing seal meets medical cleanliness standards.
The price of Double-Row Slewing Bearings is affected by the following factors. As a leading enterprise in slewing bearing China, NEWBEE Transmission can provide cost-effective solutions:
1.Materials and Processes: The price of Double-Row Slewing Bearings made of 42CrMo forged steel is 35%-45% higher than that of ordinary cast steel. Products using vacuum degassing process to reduce internal defects have an additional 15% price increase, which are especially suitable for scenarios with high requirements for the stability of the slewing bearing drive.
2.Precision Grade: Double-Row Slewing Bearings with GB Class 5 precision have a 20%-30% higher price than those with GB Class 7 due to the high meshing accuracy of the slewing bearing drive, making them suitable for semiconductor or medical equipment.
3.Specification and Size: The price of Double-Row Slewing Bearings with an outer diameter of 3-5m is relatively low. For products with an outer diameter >8m or thickness >300mm, due to the limitations of processing equipment, the price increases stepwise with the size.Large-scale production by slewing bearing manufacturers can reduce costs.
4.Customization Requirements: Double-Row Slewing Bearings with IP66-class slewing bearing seals, slewing bearing drives integrated with encoders, or anti-corrosion coatings have a price increase of 25%-40%. For specific quotations, you can contact NEWBEE Transmission to obtain factory-direct supply solutions from slewing bearing China.
1. Load Matching: Select Double-Row Slewing Bearings with corresponding rated loads according to the actual axial/radial loads and overturning moments of the equipment. As a professional slewing bearing manufacturer, NEWBEE Transmission can provide slewing bearing drive load calculation software to assist in selection. 2.Precision Requirements: For high-precision scenarios (such as wind turbine pitch control), choose Double-Row Slewing Bearings with GB Class 5 to ensure no deviation of the slewing bearing drive; for general industrial scenarios, GB Class 6 is sufficient to meet the needs.
2. Environmental Adaptation: For humid/marine environments, priority should be given to products with stainless steel slewing bearing seals; for high-temperature scenarios, customized Double-Row Slewing Bearings with high-temperature tempering treatment are required. As a technology leader in slewing bearing China, NEWBEE Transmission can provide full-scenario adaptation solutions.
3. Supplier Qualifications: Choose slewing bearing manufacturers like NEWBEE Transmission that have full-process capabilities including forging, heat treatment, and precision machining. They should provide material inspection reports and slewing bearing drive performance test data to ensure product reliability.
4. Price Rationality: Compare quotations from different slewing bearing manufacturers. The factory-direct supply model of slewing bearing China (such as NEWBEE Transmission) can reduce intermediate links and lower procurement costs by 10%-15%.
NEWBEE Transmission is a leading slewing bearing manufacturer in China and a benchmark enterprise in slewing bearing China, with more than 20 years of experience in the Double-Row Slewing Bearing field. Its products cover outer diameters from 1.5m to 12m, support multiple structures such as double-row balls and double-row rollers, and can customize special slewing bearing seals (such as fluororubber, metal dust covers) and slewing bearing drive gear rings (module 2-10mm). Relying on 2000-ton forging equipment, imported German CNC grinders, and ISO 9001/13485 quality systems, NEWBEE Transmission’s Double-Row Slewing Bearings have passed 100% non-destructive testing (UT/MT). The accuracy of the slewing bearing drive and the protection performance of the slewing bearing seal meet international standards, and they are widely used in construction machinery, wind power, ports, and other fields. As an export-oriented enterprise in slewing bearing China, its products are sold to Europe, America, Southeast Asia, and are well recognized by customers. For detailed parameters of Double-Row Slewing Bearings or slewing bearing drive test reports, you can contact the technical team directly.
1. When installing Double-Row Slewing Bearings, bolts should be tightened evenly in a diagonal order (the preload is 70% of the bolt yield strength) to avoid excessive local stress affecting the accuracy of the slewing bearing drive. It is recommended to use special installation tools provided by NEWBEE Transmission.
2. Before the first operation, inject special extreme-pressure grease (the filling amount is 1/3 of the internal space) and replenish it every 150 hours of operation; in harsh environments, the interval should be shortened to 80 hours. At the same time, check whether the slewing bearing seal is intact to prevent grease leakage.
3.Regularly check the gear ring meshing gap (normal value 0.1-0.25mm) of the slewing bearing drive and the sealing performance of the slewing bearing seal. If abnormal noise, oil leakage, or excessive gap is found, stop the machine immediately for inspection to avoid raceway damage.
For the latest price of Double-Row Slewing Bearings, customized solutions for slewing bearing drives, or technical information about slewing bearing seals, please contact NEWBEE Transmission, a high-quality supplier of slewing bearing China:
Email: paul@newbeetrans.com
Official Website: www.newbeetrans.com
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sales@newbeetrans.com
+8615090185276