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How to Select the Appropriate Flange Bearing

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In a mechanical transmission system, flange bearings play a crucial role. They not only support the rotation of the shaft but also ensure the stable operation of the equipment. To select the appropriate flange bearing, it is necessary to comprehensively consider various factors.

What is flanged slewing bearing?

The flanged slewing bearing is a type of slewing bearing. It usually consists of components such as an inner ring, an outer ring, rolling elements (such as steel balls or rollers), and a cage, and is equipped with a flange structure. This flange can be easily fixed to other components of the equipment through connectors like bolts, enabling quick installation and precise positioning. It can simultaneously withstand axial forces, radial forces, and overturning moments, providing stable support for the slewing motion of the equipment. Due to its convenient installation and accurate positioning, it is widely used in fields such as tower cranes, port handling equipment, and industrial robots, ensuring the stability and reliability of these devices during operation.

Define the Working Conditions of slewing bearing

Magnitude and Direction，Accurately measure the magnitude of the load borne by the bearing and distinguish whether it is a radial load, an axial load, or a combination of both. For example, the spindle of a machine tool mainly bears radial cutting forces, while the wheel hub bearing of a car has to withstand both the radial load caused by the vehicle’s weight and the axial force generated during vehicle steering. Select a suitable flange bearing according to the load characteristics. For instance, deep – groove ball flange bearings can withstand certain radial and axial loads, and tapered roller flange bearings are better at withstanding larger axial and radial forces.

Nature，Determine whether the load is stable or impact – type. In the metallurgical industry, for example, the frequent handling of heavy objects subjects the flange bearings of cranes to impact loads. In such cases, self – aligning roller flange bearings that can withstand impacts should be selected. Their structure can buffer the impacts and prevent premature damage to the bearings.

Operating Speed，Select the appropriate flange bearing based on the operating speed of the equipment. For high – speed rotating equipment such as motors, the bearing is required to have a low friction coefficient and a high limiting speed. Ceramic ball flange bearings can be used. The low – friction characteristics of ceramic materials help reduce heat generation and meet the requirements of high – speed operation. For low – speed and heavy – load machinery, such as crushers in mining machinery, more attention is paid to the bearing’s load – bearing capacity, and the requirement for speed is relatively low. Spherical roller flange bearings are a good choice as they can withstand heavy loads at low speeds.

Operating Temperature，Consider the temperature range of the bearing’s working environment. In high – temperature environments, ordinary carbon steel flange bearings are prone to deformation and a decrease in hardness. High – temperature – resistant alloy – material flange bearings, such as those containing alloying elements like chromium and molybdenum, should be selected. These bearings can maintain good mechanical properties at high temperatures. In low – temperature environments, to avoid embrittlement of the bearing material, flange bearings made of special low – temperature steel should be chosen to ensure sufficient toughness and strength at low temperatures.

Consider the Equipment Requirements

Installation Space，Measure the dimensions of the installation space reserved in the equipment, including the inner diameter, outer diameter, and thickness of the bearing housing. If the installation space is limited, flange bearings with a compact outer dimension, such as thin – type flange bearings, should be selected. Their thin – type design can achieve good support and rotation functions in a narrow space. If the space is relatively sufficient, bearings of more suitable sizes can be selected according to load and speed conditions.

Accuracy Requirements，Select the bearing accuracy grade according to the equipment’s requirements for motion accuracy. Precision machine tools have extremely high requirements for processing accuracy and need to use high – precision P4 or P5 – grade flange bearings to ensure the dimensional accuracy and surface quality of the processed parts. For ordinary machinery with low accuracy requirements, such as agricultural machinery, ordinary – accuracy – grade (e.g., P0) flange bearings can meet the usage requirements.

Sealing Requirements，Analyze whether there are dust, moisture, corrosive media, etc., in the equipment’s working environment. In a dusty mining environment, to prevent dust from entering the bearing and aggravating wear, flange bearings with a sealing device, such as rubber – sealed flange bearings, should be selected. Their sealing structure can effectively block dust. In a humid or corrosive – medium environment, such as in chemical equipment, in addition to selecting sealed bearings, the corrosion resistance of the bearing material also needs to be considered. Stainless – steel flange bearings can be selected.

Understand the Bearing Characteristics

Structural Types，Familiarize yourself with the characteristics of different structural flange bearings. For example, flanged mounted bearings are easy to install and can be directly fixed on the equipment’s installation surface. Flanged spherical plain bearings have an automatic self – aligning function and can compensate for misalignment caused by installation errors or shaft deflection. Flange ball bearings have a low friction coefficient and high rotational speed, and flange roller bearings have a large load – bearing capacity. Select a bearing with a matching structure according to the actual needs of the equipment.

Material Characteristics，Understand the performance of commonly used bearing materials. Bearing steel is the most common material, with high hardness, high strength, and good wear resistance. Stainless – steel flange bearings have strong corrosion resistance. Ceramic – material bearings have characteristics such as low density, high hardness, high temperature resistance, and insulation. Select the appropriate bearing material according to the working conditions and equipment requirements.

Lubrication Methods，Different lubrication methods have a significant impact on the performance of flange bearings. Grease lubrication is simple to operate and convenient to maintain, and is suitable for medium – and low – speed, light – load, and occasions where it is not convenient to refuel frequently. Oil lubrication has good heat dissipation performance and can effectively reduce friction, and is often used in high – speed and heavy – load equipment. Determine the appropriate lubrication method according to the working conditions and requirements of the equipment, and select a flange bearing that matches it.

Prices of Flange Slewing bearings

There are many factors affecting the price of slewing bearings. Firstly, raw materials. High – quality steel has a high cost, and products made from it have excellent performance and a long service life, so the price is also high. Secondly, slewing bearings with complex manufacturing processes and high – precision requirements need advanced equipment and strict quality control, and the price will also increase accordingly. Moreover, the larger and more special the size and specifications are, the greater the processing difficulty and the amount of materials used, and the higher the price will be.

Suppliers of Flange Slewing bearings

With excellent product quality, strong technical strength, and a perfect service system, ldb bearing company has become a benchmark in the slewing bearing industry. In the future, it is believed that it will continue to adhere to the concept of innovation and quality first, shine more brightly in the global market, and contribute more to the development of various industries.

Why is the flanged slewing bearing so important?

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Thanks to its unique structural design, the flanged slewing bearing integrates the slewing and load – bearing functions within a limited space. It is applied in many fields such as construction machinery, energy, special – purpose vehicles, port and ship, industrial automation, and robotics. It has the advantages of easy installation, precise positioning, strong load – bearing capacity, smooth operation, and good sealing performance. Moreover, it features high manufacturing precision and strong reliability.

What are the features of the flanged slewing bearing?

Flanged slewing bearing, with their unique structural design, achieve a compact layout. They can perfectly integrate the slewing motion and load – bearing functions within extremely limited space. This feature makes them widely used in equipment where space is at a premium, greatly enhancing space utilization. In terms of load – bearing capacity, through elaborate structural design and the use of strictly selected high – strength materials, they demonstrate excellent performance. They can easily handle strong axial forces, radial forces, and complex overturning moments, which is sufficient to meet the support and slewing requirements of various heavy – duty equipment under harsh working conditions.

From the perspective of precision, the manufacturing process of flanged slewing bearings is extremely strict. The processing accuracy of the raceways and rolling elements, as well as the final assembly accuracy, are all controlled within a very small error range. This enables them to maintain high – precision slewing motion during long – term and high – frequency use, laying a solid foundation for the precise processing and stable operation of equipment. In terms of reliability, high – quality materials, advanced manufacturing processes, and a reasonable internal structural design work together. Coupled with a perfect sealing and lubrication system, they can effectively resist the invasion of harsh working environments such as dust, moisture, and high temperatures, greatly reducing the probability of failures and thus significantly extending their service life.

In terms of installation and maintenance, their advantages are also prominent. The flanged is equipped with standard mounting holes. By using bolts, the slewing bearing can be quickly connected to other components of the equipment. The entire installation process is simple and efficient, which can greatly reduce the difficulty and cost of equipment installation. Moreover, due to their high degree of standardization, products of the same type and specification have good interchangeability. Once a failure occurs and maintenance or replacement is required, the operation can be completed quickly, effectively reducing equipment downtime and ensuring the continuity of production.

Flanged slewing bearings are widely used in the following fields:

Construction Machinery Field

Cranes: Truck cranes, crawler cranes, tower cranes, etc. The slewing bearing is installed between the chassis and the turntable. It withstands the huge axial forces, radial forces, and overturning moments when lifting heavy objects, ensuring the stable rotation of the turntable and enabling lifting operations in different directions.

Excavators: It is the core component for the rotation of excavators. It connects the rotating upper body to the chassis, allowing the excavator to flexibly perform operations such as excavation and loading.

Energy Field

Wind Power Generation: It is used between the hub and tower of wind turbines, on the rotating components of the main shaft and impeller, and in the yaw part of the nacelle. It withstands huge torques and axial loads, ensuring that the impeller can adjust its angle with the change of wind direction and improving power generation efficiency.

Solar Power Generation: In solar photovoltaic power generation systems, it can be used in tracking systems, enabling solar panels to rotate according to the position of the sun to obtain the best lighting angle.

Special – Purpose Vehicle Field

Concrete Pump Trucks: It plays a role in connecting the chassis and the boom of the pump truck. The boom can achieve multi – angle rotation through the slewing bearing, enabling the accurate delivery of concrete to various positions in construction sites.

Fire Trucks: In aerial ladder fire trucks, the aerial ladder is connected to the chassis of the fire truck through the slewing bearing, allowing it to rotate freely in the horizontal direction and quickly adjust to the best rescue position. The fire water cannon also uses the slewing bearing to achieve horizontal and vertical rotation, accurately spraying water to different positions at the fire scene.

Port and Ship Field

Port Cranes: Such as quay container cranes and portal cranes. The slewing bearing enables the boom or turntable of the crane to rotate 360 degrees, realizing the loading and unloading of ship cargo and improving the cargo handling capacity of the port.

Marine Cranes: Also known as floating cranes, they are installed on ships for lifting cargo or performing offshore operations. The slewing bearing ensures the stable rotation and operation of the crane on the ship, adapting to the complex working conditions at sea.

Industrial Automation and Robot Field

Industrial Robots: It is applied to the joints of welding robots, palletizing robots, handling robots, etc., enabling the arms or joints of the robots to rotate flexibly and perform various complex actions and operations, improving production efficiency and quality.

Automated Production Lines: It is used in some workbenches that require rotational motion and transfer parts of conveyor lines, realizing the accurate transfer of materials and the conversion of processing positions, and improving the degree of automation and coordination of the production line.

Flanged slewing bearings have the following advantages:

Easy Installation: The flanged is equipped with a series of bolt holes. Through bolts, the slewing bearing can be quickly fixed to other components of the equipment. The installation process is simple and efficient, which can shorten the equipment assembly time and improve the installation accuracy.

Precise Positioning: During installation, the flanged fits closely with related components, and the fitting accuracy is high. It can provide accurate positioning for the slewing components, ensuring that the axis of the slewing motion is consistent with the design requirements, which is conducive to improving the overall operation accuracy of the equipment.

Strong Load – Bearing Capacity: With a reasonable structural design, it can simultaneously withstand large axial forces, radial forces, and overturning moments, meeting the slewing support requirements of large – scale mechanical equipment such as cranes and excavators under heavy – load conditions.

Smooth Operation: The rolling elements and raceways inside are precisely matched, and the friction coefficient is small. During the slewing process, it can effectively reduce vibration and noise, and the operation is smooth, which is conducive to improving the working efficiency and service life of the equipment.

Good Sealing Performance: Usually, there are good sealing designs at the joints between the flanged and other components and inside the slewing bearing. It can effectively prevent the intrusion of dust, moisture, impurities, etc., avoiding the wear and corrosion of internal parts and ensuring the normal operation of the slewing bearing.

The Price of flanged slewing bearing?

There are many factors affecting the price of flanged slewing bearing. In terms of raw materials, using high – quality steel such as 42CrMo can improve the strength, toughness, and wear resistance of the product, but it also increases the cost. In terms of manufacturing processes, advanced and precise processing equipment and strict quality control processes can ensure that indicators such as dimensional accuracy and surface roughness reach a high level, but this will also increase the price. The size and specification of the product are also crucial. Large – sized, special – specification, or flanged slewing bearings with high load – bearing capacity requirements are difficult to produce, and their prices will also increase accordingly. Brand and manufacturer reputation cannot be ignored. Well – known brands invest a lot in research and development, production, and after – sales service. Their products are of reliable quality, and the prices are often higher. In addition, changes in market supply and demand will cause price fluctuations. When demand is strong and supply is tight, the price rises; otherwise, it falls.

Suppliers of Flanged Slewing Bearings

LDB Bearing, established in 1999, is located in Luoyang, Henan Province, a major bearing production base in China. Since its birth, it has been shining brightly in the bearing field. It is like a bright star, focusing on the design, development, manufacturing, and sales of precision slewing bearings and precision slewing drives. We have the most cost – effective sales plans for flanged slewing bearings here. If you want to purchase, please contact us.