Zhejiang Judong Bearings Co., Ltd., established in [2016], is located in Zhejiang Province, China. We are a professional manufacturer and supplier of a wide range of bearing products. Our bearings are widely used in industries such as machinery manufacturing, automotive, electronics, home appliances, and industrial automation.
Needle roller bearings are a special type of rolling bearings. Their main characteristic is the use of slender needle rollers as rolling elements. The following is a detailed introduction to needle roller bearings:
Structure and Composition
Outer Ring: Usually designed with a thin - walled structure, it provides a rolling track for the needle rollers.
Inner Ring: Some needle roller bearings are equipped with an inner ring, while others directly use the shaft as the inner ring.
Needle Rollers: These are slender cylindrical rolling elements with a small diameter and a large length, capable of withstanding high radial loads.
Cage: It is used to fix the position of the needle rollers, ensuring their even distribution and reducing friction.
Sealing Device: Some needle roller bearings are equipped with sealing rings to prevent contaminants from entering and maintain lubrication.
Main Features
High Load - carrying Capacity: The large contact area between the needle rollers and the raceways enables the needle roller bearings to withstand high radial loads.
Compact Design: With small - diameter needle rollers, the overall structure of the bearings is compact, making them suitable for applications with limited space.
Low Friction: The rolling friction between the needle rollers and the raceways is small, resulting in high operating efficiency.
High - speed Performance: Some needle roller bearings are designed for high - speed operation.
Economical: With a simple structure and low manufacturing cost, they offer high cost - effectiveness.
Main Types
Needle Roller Bearings without Inner Ring: They directly use the shaft as the inner ring and are suitable for applications with larger shaft diameters.
Needle Roller Bearings with Inner Ring: Equipped with an inner ring, they are suitable for applications with smaller shaft diameters.
Full - complement Needle Roller Bearings: Without a cage, the needle rollers fill the raceways, providing higher load - carrying capacity but lower rotational speeds.
Thrust Needle Roller Bearings: Used to withstand axial loads and are usually used in combination with other bearings.
Combined Needle Roller Bearings: Combine needle roller bearings with other types of bearings (such as ball bearings) and are suitable for combined loads.
Application Areas
Automotive Industry: Such as gearboxes, engines, and steering systems.
Industrial Machinery: Such as printing machines, textile machines, and packaging machines.
Aerospace: Such as aircraft landing gears and engine components.
Household Appliances: Such as washing machines and air - conditioning compressors.
Power Tools: Such as electric drills and angle grinders.
Advantages
High Rigidity: The large contact area between the needle rollers and the raceways results in high bearing rigidity.
Space - saving: The compact structure makes them suitable for applications with limited space.
Long Service Life: High - quality materials and precise manufacturing processes ensure a long service life for the bearings.
Low Maintenance: With a simple design, they are easy to maintain.
Selection and Installation
Selection Points: Select the appropriate model and size according to factors such as load, rotational speed, and working environment
Installation Precautions
Ensure the shaft and the bearing housing are clean.
Use appropriate tools for installation to avoid damaging the bearings.Regularly check the lubrication condition and replenish or replace the grease in a timely manner.
Maintenance and Upkeep
Regular Lubrication: Select suitable grease according to the operating conditions and replenish or replace it regularly.
Check Sealing: Ensure the sealing device is in good condition to prevent contaminants from entering.
Monitor Operating Status: Regularly check the vibration, temperature, and noise of the bearings to detect and solve problems in a timely manner.Summary
Needle roller bearings, with their high load - carrying capacity, compact design, low friction, and economic efficiency, are widely used in the automotive, industrial machinery, aerospace, and other fields. Whether it is high - load or high - speed operation, needle roller bearings can provide efficient and stable solutions.
| Bearing Model |
Bore Diameter (mm) |
Outer Diameter (mm) |
Width (mm) |
Weight (kg, approx.) |
| HK0804 |
8 |
16 |
4 |
0.006 |
| HK1004 |
10 |
19 |
4 |
0.008 |
| HK1204 |
12 |
22 |
4 |
0.01 |
| HK1506 |
15 |
24 |
6 |
0.015 |
| HK1606 |
16 |
26 |
6 |
0.018 |
Design and Structural Advantages
Space - Saving: Needle roller bearings have small - diameter needle rollers, which make the radial dimension of the bearings more compact. In a limited installation space, they can leave more room for other components of the equipment, facilitating the miniaturization and lightweight design of the equipment. They are particularly suitable for applications with strict space requirements, such as automotive gearboxes and aerospace equipment.
Diversified Design: There are various design forms, including needle roller bearings with stamped outer rings, needle roller bearings with solid rings, and needle roller and cage assemblies. Different design forms can meet a wide range of application needs and installation conditions. For example, needle roller bearings with stamped outer rings have lower costs and are suitable for general industrial applications in mass production. In contrast, needle roller bearings with solid rings have higher strength and precision, making them suitable for high - load and high - precision scenarios.
Performance Advantages
High Load - Carrying Capacity: Due to the large contact area between the needle rollers and the raceways, needle roller bearings can withstand relatively large radial loads. Compared with other types of bearings of the same size, needle roller bearings can operate stably under higher loads, which is suitable for heavy - duty working conditions in construction machinery and agricultural machinery.
High - Speed Performance: Through the optimization of the shape, surface quality of the needle rollers, and the design of the cage, some needle roller bearings can operate at relatively high speeds, meeting the requirements of high - speed equipment such as machine tool spindles and high - speed motors.
Low Friction Coefficient: The rolling friction characteristics of the needle rollers result in a small friction coefficient during the operation of the bearings. This can effectively reduce energy consumption, improve the transmission efficiency of the equipment, reduce heat generation and wear, and extend the service life of the equipment.
Good Rigidity: Needle roller bearings can provide relatively high rigidity, which helps to improve the overall stability and precision of the equipment, ensuring that the equipment maintains an accurate position and motion trajectory during operation. They are suitable for equipment with high precision requirements, such as machine tools and robots.
Application and Maintenance Advantages
Wide Applicability: Needle roller bearings can be used in various industrial fields and different types of equipment. Whether it is the automotive manufacturing, machining, food packaging, or textile machinery industries, needle roller bearings can be found in use. They have strong universality and adaptability.
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