Cylindrical roller bearings NU1056M/HC NU3164/C9 NU2272/C9
Cylindrical roller bearings are key components widely used in mechanical systems that require significant radial loads. It has the advantages of simple structure, strong load-bearing capacity, and low frictional resistance, and plays an important role in various heavy machinery and industrial equipment. Below, we will analyze several specific models in detail: NU1056M/HC, NU3164/C9, NU2272/C9, and describe their characteristics, applications, size specifications, and technical advantages from different aspects.
1. Overview of cylindrical roller bearings
Cylindrical roller bearings belong to the sliding friction type of rolling bearings, which use cylindrical rollers inside, and these rollers are usually not spaced or separated by a cage. The characteristic of cylindrical roller bearings is that they can withstand large radial loads and have higher rigidity compared to other types of bearings (such as ball bearings), making them suitable for working conditions with large loads.
Load bearing capacity: Cylindrical roller bearings can withstand large radial loads by contacting the inner and outer rings with multiple cylindrical rollers. Suitable for situations with heavy loads or high impact loads.
Friction coefficient: Due to the larger contact surface of cylindrical rollers, the friction coefficient is smaller, and compared to other bearings, the rotation is smoother.
Service life: The cylindrical roller bearing has good contact between the rollers and the inner and outer rings, reducing local friction and extending the service life of the bearing.
2. Detailed analysis of various types of bearings
NU1056M/HC
Model analysis:
NU: Indicates that the bearing is a single row cylindrical roller bearing, suitable for withstanding large radial loads.
1056: Indicates the size specifications of the bearing, such as inner diameter, outer diameter, and width. These types of bearings have relatively large sizes and are suitable for applications that require carrying large loads.
M: The bearing is equipped with a cage, which ensures the uniform distribution of rollers, reduces friction between rollers, and reduces temperature rise.
HC: This bearing has a high-temperature strengthening design and is suitable for high-temperature environments or high load, high-speed operating situations.
Applicable scenarios:
Suitable for high-temperature and high load environments such as metallurgical machinery, mining machinery, and wind power generation equipment.
High speed equipment: The NU1056M/HC bearing design has a low coefficient of friction, making it particularly suitable for high-speed rotating machinery to maintain smooth operation.
NU3164/C9
Model analysis:
NU: Single row cylindrical roller bearing, capable of withstanding radial loads.
3164: Represents the specific dimensions of the bearing, such as inner and outer diameters, suitable for medium to heavy machinery.
C9: Refers to the large clearance design of the bearing, which is used to adapt to working environments with large temperature changes and significant thermal expansion. The C9 clearance design can ensure that the clearance inside the bearing remains stable during high temperature or high load operation of the equipment, avoiding damage caused by excessive tightening or temperature changes.
Applicable scenarios:
Mining machinery, heavy transportation equipment, cranes, and other equipment that need to withstand large loads and high impacts.
The C9 design can effectively ensure the long-term reliability of bearings in environments with high temperatures, high loads, and large temperature differences.
NU2272/C9
Model analysis:
NU: Single row cylindrical roller bearing, suitable for withstanding large radial loads.
2272: Bearing size series, suitable for larger loads and larger equipment sizes.
C9: Same as NU3164/C9, it indicates that the bearing has a large clearance to adapt to temperature changes and mechanical expansion.
Applicable scenarios:
Heavy machinery, wind turbine shafts, metallurgical equipment, etc.
Suitable for environments that require significant radial loads and may involve large temperature fluctuations.
3. Advantages of bearing technology
High load-bearing capacity
Cylindrical roller bearings can distribute loads over a larger area by having multiple rollers in contact with the inner and outer rings, allowing them to withstand larger radial loads. This makes cylindrical roller bearings particularly suitable for applications with heavy loads, impact loads, and high vibrations.
Roller design: Compared with ball bearings, cylindrical rollers have a larger contact area and can withstand greater radial loads, especially suitable for high-speed operation and high impact equipment.
Smaller coefficient of friction
The design of cylindrical roller bearings ensures more uniform contact between the rollers and the inner and outer rings, resulting in lower frictional resistance. Compared to other bearings, cylindrical roller bearings have higher energy efficiency and generate less heat during rotation, thereby extending their service life.
Low friction: A low friction coefficient helps to reduce heat generation, minimize equipment wear caused by high temperatures, and extend the operating cycle of equipment.
High temperature adaptability
Some models, such as NU1056M/HC, are designed with high temperature enhancement (HC) function, which can operate stably in extreme environments. They are particularly suitable for working under high temperature and high load conditions, avoiding bearing damage caused by excessively high operating temperatures.
High temperature resistance: The stability of bearing materials at high temperatures ensures their safe operation, making them suitable for industries such as metallurgy and petrochemicals.
Large clearance (C9)
Designing bearings with larger clearances (such as NU3164/C9 and NU2272/C9) can better adapt to working environments with large temperature fluctuations. A larger clearance can effectively reduce the impact of temperature expansion on bearing performance, avoid excessive friction between the inner and outer rings caused by thermal expansion, and prevent bearing jamming or damage.
Stability: A larger clearance allows the bearing to maintain stable performance over a wider temperature range.
Retaining frame design
Most cylindrical roller bearings are equipped with cages (such as the cage design of NU1056M). The function of the cage is to ensure that the rollers are evenly spaced, reduce friction between the rollers, lower friction losses, reduce temperature rise, and thus improve the working efficiency of the bearing.
Reduce friction: The design of the cage not only reduces the temperature rise of the bearing, but also reduces the wear caused by friction between the rollers.
4. Typical application areas
Metallurgical industry
In the metallurgical industry, cylindrical roller bearings are commonly used in mechanical equipment that can withstand large radial loads, such as rolling mills, smelting furnaces, heavy-duty conveyor belts, etc. These devices typically operate in high temperature and high load environments, requiring bearings to have good high-temperature adaptability and load-bearing capacity.
Mining machinery
Mining equipment such as crushers, screening machines, and mining transportation equipment require strong load-bearing capacity. Cylindrical roller bearings are widely used in mining machinery due to their excellent load-bearing performance and high durability.
Wind power generation
The main shaft and gearbox of wind turbines require high-precision and high load-bearing capacity bearings. Cylindrical roller bearings are widely used in such applications, especially in components that require significant radial loads.
heavy machinery
Heavy machinery such as excavators, cranes, and railway locomotives often require cylindrical roller bearings to withstand strong radial and impact loads.
Industrial pumps and compressors
Industrial pumps, compressors, and other equipment are commonly used in high load and high vibration conditions. Cylindrical roller bearings have good application prospects in these fields.
