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What is a roller bearing？

Roller bearing is a type of rolling bearing that uses cylindrical, conical or spherical rolling elements to reduce friction between a rotating shaft and other mechanical components while supporting and guiding the rotational motion of the shaft. Roller bearings can withstand higher radial and axial loads. Compared with ball bearings, roller bearings are usually more efficient in environments with larger loads and high speeds. They are widely used in various machinery, automobiles, in industrial equipment and tools.

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Common specification data for roller bearings

What are the materials and manufacturing of roller bearings?

Material:

①Bearing steel: Most roller bearing rings and rolling elements are made of high-purity bearing steel, such as 100Cr6 steel, which contains about 1% carbon and 1.5% chromium. After heat treatment, the hardness ranges from 58 to 65 between HRC.

②Silicon nitride ceramic: In high-temperature or high-speed applications, the rolling elements may use silicon nitride ceramic material, which has the characteristics of high hardness, low density and high elastic modulus.

③Stainless steel: Under some special working conditions, if high corrosion resistance is required, the bearings may be made of stainless steel.

④ Engineering plastics: The cage may be made of materials such as polyamide (PA66, PA46), polyetheretherketone (PEEK) or phenolic resin. These materials have good sliding properties and dimensional stability.

Manufacturing process:

① Forging: First, the bearing steel bar is forged to form a bearing ring blank.

②Lathe processing: Then perform lathe processing to form the general shape of the ferrule.

③Heat treatment: The heat treatment process includes quenching and tempering to improve hardness and wear resistance.

④Grinding process: including rough grinding and fine grinding to ensure the accuracy and surface finish of the bearing.

⑤Super-finishing: Ultra-precision processing of the rolling surface to achieve higher surface quality.

⑥Assembly: Assemble the inner ring, outer ring, rolling elements and cage into a complete bearing.

⑦ Cleaning and oiling: Finally, clean, dry and oil to provide anti-rust protection and initial lubrication for the bearings.

What are the product features of roller bearings?

①High speed: Tapered roller bearings can withstand high-speed rotation, mainly due to their special design structure.

②High rigidity: Tapered roller bearings have high rigidity, which means they are able to maintain shape and dimensional stability when subjected to load, which is very important for applications that require precise control of motion.

③Impact resistance: Tapered roller bearings can withstand large impacts and vibrations, which makes them particularly suitable for applications that may be subject to sudden loads or vibrations during operation.

④ Strong load-bearing capacity: Tapered roller bearings can withstand large combined radial and axial loads, which makes them perform well in heavy-load applications.

⑤Small friction coefficient: The cylindrical roller and the raceway are in line contact or modified line contact, so the friction coefficient is small, which helps to reduce energy loss and improve transmission efficiency.

⑥ Suitable for high-speed rotation: Cylindrical roller bearings are suitable for high-speed rotation and have a small friction coefficient, which makes them very useful in applications requiring high-speed operation.

⑦Separability: Many types of roller bearings (such as cylindrical roller bearings and some tapered roller bearings) are separable, which facilitates installation, disassembly and cleaning.

⑧Low noise: Some roller bearings (such as full complement cylindrical roller bearings) have low noise characteristics, which is very important for applications that require a quiet operating environment.

⑨Alignment performance: Some types of roller bearings (such as spherical roller bearings) have automatic alignment functions, which can compensate for errors caused by shaft deflection or non-concentricity, thereby ensuring smooth operation.

What fields can roller bearings be used in?

①Agricultural machinery field: Roller bearings are mainly used in tractors, harvesters and other equipment. These equipment usually work under low speed and heavy load conditions, so the bearings are required to have good load-bearing capacity and wear resistance.

② Industrial machinery field: Roller bearings are mainly used in equipment such as machine tools, motors, pumps, compressors, etc. These equipment usually require bearings with high precision and high reliability.

③Automotive field: Roller bearings are mainly used in key parts such as engines, transmissions, and suspension systems. Due to the complex and changeable operating environment of automobiles, bearings are required to have high durability and reliability.

④Aerospace field: Roller bearings are mainly used in key parts such as aircraft engines and helicopter rotors. Since aerospace equipment has extremely high requirements on weight and performance, bearings are required to be lightweight, high-strength and highly reliable.

⑤Medical equipment field: Roller bearings are mainly used in medical centrifuges, dental drills and other equipment. These equipment usually require bearings with high precision, low noise and no pollution.

⑥Printing machinery field: Roller bearings are mainly used in offset printing machines, gravure printing machines and other equipment. These equipment usually require bearings with high precision, high speed and long life.

What are the performance advantages of roller bearings?

① Loading capacity: Roller bearings can withstand higher radial loads and impact loads than ball bearings.

②Low friction: The rolling elements of the roller bearing are in line contact with the raceway, and the friction coefficient is small, making it suitable for high-speed rotation.

③Rigidity: Roller bearings have high rigidity and are suitable for rigid bearing applications that require preloading.

④Speed speed: Roller bearings usually have a high limit speed and are suitable for high-speed operation.

⑤Long life: Optimized geometric design and material selection can extend the service life of the bearing.

⑥Reliability: Roller bearings are manufactured with high precision and can provide consistent performance and reliability.

⑦Easy maintenance: Many roller bearings are designed to be detachable, which facilitates installation and disassembly, simplifying the maintenance and repair process.

⑧Design flexibility: Roller bearings have a variety of design variants, such as single row, double row and four rows, to adapt to different application needs.

⑨High temperature resistance: Certain roller bearing materials and designs can withstand high temperature operating conditions.

FAQ

①What applications are roller bearings suitable for?

Roller bearings are used in a variety of applications including automotive, machine tools, electrical machinery, metallurgy, textiles, mining, printing and aerospace.

②What is the load-bearing capacity of roller bearings?

Compared with ball bearings, roller bearings can withstand higher radial loads and impact loads and have excellent load-bearing capacity.

③What is the rotational speed capability of roller bearings?

Roller bearings usually have higher limit speeds and are suitable for high-speed operation.

④What is the general service life of roller bearings?

The service life of bearings is affected by many factors, including load, speed, lubrication and working environment. It can reach tens of thousands to millions of revolutions under correct use.

⑤How to choose the correct roller bearing?

When selecting a bearing, you need to consider the load that the bearing can bear, axial and radial loads, rotation speed, alignment performance, and installation and disassembly requirements.

⑥Do roller bearings need maintenance?

Yes, roller bearings require regular inspection, cleaning and lubrication to ensure optimal performance and extended service life.

⑦Do roller bearings need lubrication?

Yes, lubrication reduces friction, prevents wear, and helps dissipate heat.