Luoyang Inno Bearing Co., Ltd. Four-row Tapered Roller Bearing Quality Assurance System

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Quality is the lifeline of an enterprise. Luoyang Inno Bearing Co., Ltd. is well aware of this and has established a complete quality assurance system in the production process of four-row tapered roller bearings.
Starting from the purchase of raw materials, the company strictly controls and only selects high-quality materials to ensure the basic quality of the bearings. In terms of production technology, Luoyang Inno Bearing Co., Ltd. uses advanced CNC processing equipment and precise manufacturing processes to ensure the dimensional accuracy and surface quality of each bearing.


During the production process, the company has set up multiple quality inspection processes and uses advanced testing equipment to conduct comprehensive inspections on bearings, including dimensional measurement, hardness testing, and precision testing. Only products that pass all inspections can enter the next process or finally leave the factory.
In addition, Luoyang Inno Bearing Co., Ltd. also pays attention to after-sales service, responds to customer needs in a timely manner, provides customers with technical support and quality feedback, and ensures that customers can use the four-row tapered roller bearings produced by the company with confidence.

Application of four-row tapered roller bearings in heavy machinery and the contribution of Luoyang Inno Bearing Co., Ltd.

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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.

Characteristics analysis of four-row tapered roller bearings

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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.

Key applications of four-row tapered roller bearings in rolling mill equipment

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In the industrial field, the stable operation of rolling mill equipment is inseparable from the support of key components, and four-row tapered roller bearings are one of them. Four-row tapered roller bearings have strong load-bearing capacity and can withstand huge radial and axial loads. This feature makes them an indispensable and important part of rolling mill equipment.


Luoyang Inno Bearing Co., Ltd. has excellent technology and rich experience in the production and manufacturing of four-row tapered roller bearings. With advanced production technology, the company strictly controls product quality to ensure that every four-row tapered roller bearing shipped from the factory can meet high standards.
The four-row tapered roller bearings produced by the company play an important role in rolling mill equipment. Its high-precision manufacturing process ensures the stability of the bearings at high speeds and effectively reduces the vibration and noise of the equipment. At the same time, good wear resistance and fatigue resistance extend the service life of the bearings and reduce the maintenance cost of the equipment.
Luoyang Inno Bearing Co., Ltd. has always been committed to providing customers with high-quality four-row tapered roller bearing products to meet the needs of many industries such as rolling mill equipment, and is a trustworthy bearing supplier.

Why are four-row tapered roller bearings the first choice for industrial equipment upgrades? Luoyang INNO Bearing CO,LTD Revealing the four core advantages

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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

What is the difference between rolling bearings and slewing bearings?

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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.

  1. 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.

  1. 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.

  1. 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.

Things to note when choosing bearing lubricant

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Bearing lubricant analysis is crucial to maintaining normal operation of bearings. Its main functions are as follows:

  1. Reduce friction and wear: Lubricating oil generates an oil film on the bearing surface, reducing friction and wear between the bearing, the shaft and the bearing seat, thereby extending the bearing life.
  2. Prevent rust and corrosion: Lubricating oil can prevent the bearing surface from being eroded by water, gas and other substances, and avoid rust and damage problems.
  3. Give full play to heat dissipation efficiency: In high-speed or high-temperature environments, lubricating oil effectively takes away the heat generated by the bearing, reduces the operating temperature of the bearing, and improves its working performance and stability.
  4. Has a cleaning function: Lubricating oil helps clean dirt and impurities on the bearing surface, prevents them from invading the bearing structure, and protects its normal operation.
  5. It also has sealing and waterproof functions: The lubricating oil builds a sealing area between the bearings, blocking external clutter and moisture from entering, ensuring the bearing’s leak-proof and sealing performance.

In order to ensure the normal operation of bearings, extend the overhaul cycle and improve work efficiency and reliability, it is crucial to select the appropriate lubricant. Based on the above functions, the following factors should be focused on when selecting lubricants:

  1. Suitable viscosity: The viscosity of lubricating oil has a direct impact on its fluidity and lubrication effect. The selection should be based on characteristics such as bearing pressure, speed and temperature, and should be maintained within a moderate range.
  2. Excellent oxidation stability: Bearing lubricating oil must have good oxygen resistance. Because it is easily oxidized by oxygen when left in the atmosphere for a long time, the performance of the lubricating oil will be damaged or even invalid. Therefore, lubricants with good antioxidant properties are preferred.
  3. Excellent anti-rust ability: The anti-rust properties of lubricating oil are related to the service life of the bearing. The added antioxidants can form a protective layer on the bearing surface to prevent it from being corroded, thus extending the bearing life.
  4. Excellent anti-foaming property: During the startup and operation of the machine, the lubricating oil will generate bubbles due to stirring. Such foam will weaken the lubrication effect and seriously shorten the bearing life. Therefore, it is crucial to choose a lubricant with good anti-foam properties.
  5. Good oil-water separation performance: In actual operation, lubricating oil will inevitably come into contact with water. If oil and water cannot be effectively separated, the lubricating oil will easily fail. Therefore, it is particularly necessary to choose lubricating oil with excellent oil-water separation ability.

In summary, when selecting bearing lubricants, multiple factors need to be weighed, such as appropriate viscosity, excellent antioxidant stability, excellent rust prevention capabilities, excellent anti-foaming properties, and excellent oil-water separation performance. In the process of selecting and using lubricants, it is necessary to fully combine the actual situation and comprehensively consider these factors in order to select the lubricant that best meets the requirements, so as to ensure the normal operation of the bearing and extend the service life.

Basic knowledge of open bearings

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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.

Characteristics and differences between angular contact bearings and deep groove ball bearings

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Characteristics of angular contact ball bearings:

  1. It has the characteristics of strong load-bearing capacity, good rigidity, high rotation speed, high precision, and convenient installation and adjustment.
  2. It can bear both radial load and axial load.
  3. Easy to manufacture, low cost and suitable for mass production.
  4. Angular contact ball bearings are suitable for mechanical equipment with high precision requirements.

Characteristics of deep groove ball bearings:

  1. Small friction, high rotation speed, simple structure, high manufacturing precision and low manufacturing cost.
  2. There are more than 60 types of modified structures, which are widely used.
  3. Suitable for electromechanical motors, industrial machinery, gear boxes, industrial pumps, agricultural machinery, household appliances and other fields.
  4. It is the most common type of rolling bearing and is easy to operate.

There are significant differences in performance between angular contact ball bearings and deep groove ball bearings. Angular contact ball bearings can withstand larger radial loads and axial loads, and their ability to withstand eccentric loads is stronger than deep groove ball bearings.

At the same time, angular contact ball bearings can automatically adjust axial clearance to ensure stable operation even at higher speeds. In addition, angular contact ball bearings have higher speed limit and friction coefficient, which makes them perform better in high-speed rotation applications.

Deep groove ball bearings can also bear radial loads and axial loads, but their ability to bear eccentric loads is weak. Deep groove ball bearings have a lower friction coefficient and lower speed limit than angular contact ball bearings, making them suitable for use in low-speed rotating applications.

Generally speaking, angular contact ball bearings and deep groove ball bearings have their own advantages in performance, and users need to choose the appropriate bearing type based on actual application requirements.

Angular contact ball bearings have good radial load-bearing capacity and are suitable for high-load or high-speed operation situations, such as machine tool spindles, motors, reducers, etc. Its contact angle is usually 45° or 90°, and it can be divided into single row and double row.

Deep groove ball bearings have good impact resistance and a wide speed range, and are suitable for light or medium load applications, such as automobiles, motorcycles, office equipment, etc. The contact angle is usually 60°, and there are two types: single-row and single-row. Double row, usually with steel ball cage or roller cage.

To sum up, there are obvious differences in the applicable fields of angular contact ball bearings and deep groove ball bearings, but they can play an important role in different environments and working conditions. When selecting bearings, you should choose according to actual needs.

Deep groove ball bearings are typically used for radial loads, while angular contact ball bearings perform well under both radial and axial loads. The difference between the care and maintenance of angular contact ball bearings and deep groove ball bearings mainly lies in the requirements for lubrication and cleaning. Deep groove ball bearings generally require more lubrication to prevent damage due to friction, but angular contact ball bearings require more lubricant to ensure adequate lubrication between the ball cages. In addition, the cleaning of angular contact ball bearings also needs to be more careful, because once internal impurities enter, it may cause wear of the steel balls and cages, leading to bearing failure. Therefore, when maintaining and maintaining angular contact ball bearings, you need to pay more attention to details and follow correct operating procedures.

Do you really understand bearing steel?

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Bearing steel is the steel used to make bearings. Mainly divided into high carbon chromium bearing steel, carburized bearing steel and medium carbon bearing steel. Among them, high-carbon chromium bearing steel has good comprehensive properties and has the largest output. It has good cutting performance after spheroidizing annealing, high hardness and good wear resistance after quenching and tempering. Widely used in bearing manufacturing.Carburized bearing steel is used for high-load, high-speed bearings, such as automobiles, tractors, etc.; medium carbon bearing steel is used for manufacturing rolling bearings. In addition, bearing steel also includes stainless steel bearing steel, etc. These materials have high strength, wear resistance, corrosion resistance and other properties, allowing the bearings to operate normally in various harsh environments.

Bearing steel is a specialty steel used to make bearings and similar parts. Widely used in machinery industry. Bearing steel has the following outstanding performance characteristics:

1.High wear resistance: Since bearings are subject to extremely severe friction and wear, the bearing steel must have high wear resistance. The high wear resistance of bearing steel is due to the fact that the steel contains a large number of carbides, nitrides and other hard points. These hard spots form a protective film that effectively reduces friction and friction between the bearing and other contact surfaces. wear and tear.

2.High hardness: The hardness of the bearing steel is required to be around 60HRC so that it can withstand larger loads during work.

3.High strength: Bearing steel needs to be strong enough to resist stresses such as impact, vibration and bending during operation.

4.Good toughness and corrosion resistance: Bearing steel also needs to have good toughness and corrosion resistance to extend its service life.

To sum up, the performance characteristics of bearing steel are high wear resistance, high hardness, high strength, good toughness and corrosion resistance. These properties make bearing steel an ideal material for manufacturing bearings and similar parts.

The production of bearing steel requires special processes. First, raw steel is melted into molten steel in a steel-making furnace, and then different alloying elements are added to adjust the composition and properties of the steel. Next, molten steel is poured into the mold and solidifies to form an ingot.The steel ingot is then heated to a certain temperature and pressed through a rolling mill into the desired product shape, such as steel plate or steel bar. Finally, the steel is heat treated to improve its hardness and wear resistance to meet the requirements of bearing use. This production process requires precise control of the composition and properties of the steel, as well as strict control of temperature, pressure and other factors during the production process to ensure the quality and performance of the bearing steel.

Only by selecting the appropriate bearing steel material can the safe operation of mechanical equipment be ensured. When choosing bearing steel materials, the first thing to consider is your own application scenario. If the equipment needs to withstand high loads and high-speed rotation, it is necessary to choose bearing steel with high hardness and good wear resistance. If the equipment needs to run continuously for a long time, it is necessary to choose bearing steel with high corrosion resistance and oxidation resistance. In addition, the temperature and humidity of the use environment must also be considered to select bearing steel materials that adapt to these conditions. Only by correctly selecting the bearing steel material that suits your needs can you ensure safe and stable operation of the equipment.