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The operation of heavy machinery has extremely high requirements for parts and components. As a key component in heavy machinery, four-row tapered roller bearings have an important mission. In heavy machinery such as large cold and hot rolling mills, four-row tapered roller bearings play an irreplaceable role.
It can withstand huge loads and ensure the stability and reliability of heavy machinery under high-load operation. Moreover, the good wear resistance of four-row tapered roller bearings prolongs the service life of heavy machinery.

Luoyang Inno Bearing Co., Ltd. focuses on providing high-quality four-row tapered roller bearings for the heavy machinery industry. The bearing products produced by the company undergo strict quality inspections to ensure that they can meet the demanding requirements of heavy machinery.
With many years of industry experience and professional technology, Luoyang Inno Bearing Co., Ltd. has provided strong support for the development of heavy machinery, helping many companies to improve production efficiency and reduce operating costs.

Four-row tapered roller bearings have unique structural and performance characteristics. It can be separated, and the components consisting of the inner ring, rollers, and cages and the outer ring can be installed separately. This structural feature makes installation and disassembly more convenient.
The modified contact line at the contact between the roller and the raceway can reduce stress concentration and greatly improve the service life of the bearing. Moreover, the four-row tapered roller bearing can withstand large radial and axial loads and is suitable for a variety of complex working conditions.

Luoyang Inno Bearing Co., Ltd. has conducted in-depth research on the characteristics of four-row tapered roller bearings and continuously optimized product design. The company has a professional R&D team, combined with advanced technical equipment, to produce four-row tapered roller bearings with excellent performance.
In the market competition, the four-row tapered roller bearings of Luoyang Inno Bearing Co., Ltd. stand out with their reliable quality, reasonable price and high-quality after-sales service. Whether it is the accuracy, stability or durability of the product, it has been recognized by customers and provided a strong guarantee for the production and operation of many enterprises.

Luoyang INNO Bearing CO,LTD professional analysis of the four major technical advantages of four-row tapered roller bearings under heavy load and high-speed conditions, providing customized bearing solutions, helping to increase equipment life by 30%+, click to get the bearing selection guide!

Industrial equipment upgrade, bearing performance determines production efficiency
In core areas such as metallurgy, mining, and heavy machinery, equipment has long faced severe challenges of high loads and strong impacts. Traditional double-row bearings are prone to early failure due to insufficient load capacity, and four-row tapered roller bearings are becoming a key breakthrough for equipment upgrades with their unique structural design and material technology.

Luoyang INNO Bearing CO,LTD Four differentiating advantages of four-row tapered roller bearings

1. Super strong load-bearing capacity, breaking the heavy load limit

• The four-row roller symmetrical arrangement structure is adopted, and the load distribution uniformity is improved by 40%
• The maximum radial load of a single set of bearings can reach 2000kN, and the axial load is 1200kN (supporting customized enhancement)
• Typical case: After the transformation of a rolling mill in a steel plant, the bearing life was extended from 6 months to 18 months

1. Precision preload adjustment to ensure operational stability

• Exclusive tapered raceway grinding technology to ensure that the contact surface between the roller and the raceway reaches more than 98%
• Adjustable preload device to compensate for installation errors and reduce vibration values ​​to ISO P5 standard
• Suitable for high-speed scenarios: The temperature rise is <35℃ when the measured linear speed reaches 45m/s

1. Modular design doubles maintenance efficiency

• Split cage design supports single-row replacement and reduces maintenance costs by 60%
• Standard dust cover/seal ring (IP65 protection level) to adapt to harsh working conditions such as dust and high temperature
• Quick change case: The replacement time of a cement plant’s vertical mill bearing was shortened from 8 hours to 2.5 hours

1. Full life cycle cost optimization plan

• Selected special steel + carburizing and quenching process, fatigue life reaches L10=50,000 hours
• Supports grease lubrication/oil mist lubrication dual mode, saving 15-25% of annual maintenance costs
• Provides bearing health monitoring system integration services, with a fault warning accuracy rate of ≥92%

Why choose Luoyang INNO Bearing CO,LTD ?
① 20 years of industry experience: Serving 300+ heavy industry customers worldwide, and delivering more than 500,000 sets of four-row tapered bearings
② Customized development capabilities:

Non-standard size customization (inner diameter φ50mm-φ2000mm)

Special working condition adaptation (high temperature resistance 400℃/corrosion resistance/vacuum environment)
③ One-stop service system:

Free bearing selection calculation software

48-hour emergency response mechanism

12-month long warranty commitment

Rolling bearings and slew bearings are both types of bearings. They have many similarities in application, but there are also some obvious differences between them. Rolling bearing is a mechanical component that bears load during rolling motion and is widely used in various mechanical equipment. A slew bearing is a special type of bearing with a combined radial and axial load capacity, often used to support rotating shafts or rotary-linear motion hybrids. The two mainly differ in the following aspects:

1. Structural characteristics

The structural features of rolling bearings include balls, inner rings, outer rings, cages and other components. The inner ring is closely matched with the shaft, and the outer ring is matched with the bearing seat. The cage separates the balls and distributes them evenly. Rolling bearings have the advantages of small friction coefficient, low vibration and noise, but they also have maintenance requirements.

The structural features of slew bearings include outer rings, inner rings, rolling elements (balls or rollers) and cages. The outer ring can be an integral structure or a segmented structure, and the inner ring is closely matched with the shaft. Slewing bearings can bear both radial and axial loads, and have high rotation accuracy and axial load-bearing capacity. Slewing bearings have a long service life and are suitable for high-speed, high-precision mechanical equipment.

2. Application scope

The application range of rolling bearings is very wide, involving almost all types of mechanical equipment, such as machine tools, automobiles, aircraft, ships, etc. There are many types of rolling bearings, and the appropriate bearing type can be selected according to different loads, speeds, accuracy and speed ranges.

The application range of slew bearings is relatively narrow and is mainly used in robotic arms, packaging machinery, machine tool equipment, plastic machinery, steel rolling equipment and other fields. The characteristics of high precision, high rigidity and high load-bearing capacity of slew bearings make them an indispensable part of these high-precision mechanical equipment.

3. Load characteristics

The load properties of rolling bearings are generally radial load or axial load, but some special types of rolling bearings such as angular contact ball bearings can withstand combined radial and axial loads. The nature of the load depends on the bearing’s structural design and application.

The load properties of slew plate bearings are mixed radial and axial loads. This load characteristic gives slew plate bearings unique advantages in supporting rotating shafts or rotation-linear motion hybrids.

4. Rotation accuracy

The rotation accuracy of rolling bearings depends on their manufacturing quality, the function of the cage, and the maintenance during use. Under continuous load, the rotation accuracy of rolling bearings is prone to change.

The rotation accuracy of the turntable bearing is relatively high, and it can maintain high accuracy even under high-speed rotation. This is because the structural design of the slew bearing helps reduce friction and vibration, thereby maintaining stable rotation accuracy.

There are obvious differences between rolling bearings and slew bearings in terms of structural characteristics, load characteristics, and rotation accuracy. Rolling bearings are suitable for various mechanical equipment and have the advantages of small friction coefficient, low vibration and noise, but they require regular maintenance. Slewing bearings are suitable for high-precision mechanical equipment that supports rotating shafts or rotation-linear motion hybrids. They have the characteristics of high precision, high rigidity and high load-bearing capacity. When selecting bearings, the most suitable bearing type should be selected based on the characteristics and requirements of the specific application.

An open bearing is a rolling bearing without a sealed design. Can withstand radial load and axial load. Mainly used in high-speed operation situations, such as gearboxes, instruments, motors, household appliances, internal combustion engines, etc. Open bearing designs usually include an outer ring, an inner ring, a set of steel balls and a set of cages. These components give the open bearing the characteristics of small friction coefficient and high limit speed. In addition, open bearings are available in a variety of sizes and formats, allowing them to be adapted to a variety of applications. In specific use, open bearings are not equipped with seals and are suitable for high-speed operation to ensure their good mechanical properties.

The bearing surface of open bearings has no sealing measures, so it can be in direct contact with the outside world. This design allows the bearings to operate more efficiently and withstand higher temperatures and pressures, but is also at greater risk of wear and dirt attack. Sealed bearings have sealing measures on the bearing surface to prevent dust and impurities from entering the inside of the bearing and ensure the cleanliness and accuracy of the bearing. The operating efficiency of sealed bearings is slightly lower, but their operating environment is cleaner and more stable, and they can also extend the service life of the bearings. In some situations where dust and impurities are strictly required, sealed bearings are the first choice.

There are many kinds of materials for open bearings. Depending on the application, load-bearing capacity and usage requirements, open bearings may be made of different metals, plastics or ceramic materials. The following are some common open bearing materials:

1. Steel: It is one of the most commonly used open bearing materials. It has the advantages of high strength, good wear resistance and low cost. Typically, the internal structure of open bearings is made of steel plate or carbon steel, while the outside is protected by an anti-corrosion coating.
2. Bronze: Bronze bearings are often used in high-speed operation situations because of their good wear resistance and fatigue resistance. In addition, bronze bearings also have better impact resistance and corrosion resistance.
3. Plastic: Plastic bearings are typically used where low loads and long life are required. They are lightweight, corrosion-resistant, low-noise and not easy to get stuck. Commonly used plastic bearing materials include polyacetal, polyamide, and polyimide.
4. Ceramic: Ceramic bearings have extremely high hardness and wear resistance, so they are very suitable for applications that require high loads and long service life. Common ceramic materials include silicon nitride, aluminum oxide and silicon carbide.

Open bearings are widely used in agricultural machinery, such as tractors, harvesters, planters, etc. Its key role in agricultural machinery is to improve the reliability and durability of the equipment so that it can still work efficiently in various harsh farm environments.

In addition, open bearings are also widely used in industrial machinery fields, such as machine manufacturing, chemical industry, petrochemical industry, steel industry, etc., as well as aerospace, automobiles, wind power generation and other fields. In these areas, open bearings are often used to load-bear, support and guide the movement of shafts. Open bearings have the characteristics of low friction, high load-bearing capacity and high precision, which can improve the operating efficiency and precision of equipment, thereby improving production efficiency and product quality.