The Basic Principles and Application Range of Combined Needle Roller Bearings
Combined needle roller bearings are a type of rolling bearing, mainly consisting of an inner ring, outer ring, needle rollers, and cage. When a load is applied between the inner and outer rings, the needle rollers roll circumferentially, reducing the friction between the inner and outer rings, and making the washing machine run more smoothly.
Due to the compact structure of needle roller bearings and their ability to withstand large loads, they have a wide range of applications in various scenarios. The following are its main application areas:
High-speed Rotating Equipment
In devices that require high-speed operation, such as machine tool spindles, combined needle roller bearings are widely used. They can support high-precision motion systems and ensure stable operating performance. Additionally, their low friction coefficient helps reduce energy consumption and improve work efficiency.
Precision Instrumentation
Due to high precision and strict reliability requirements, combined needle roller bearings are also often used in the manufacture of important components and equipment in the field of precision instrumentation. For instance, some parts of aerospace equipment are processed using such bearings, significantly improving the quality and production efficiency of these products.
Heavy-duty Industrial Equipment
In some heavy-load machinery, combined needle roller bearings are used as support components due to their high load-carrying capacity and good impact resistance. They provide reliable support and maintain long-term stability in complex work environments.

The Role of Combined Needle Roller Bearings in Washing Machines
Support Role
A washing machine is a high-speed rotating appliance, and combined needle roller bearings play a supporting role. They protect the internal motor and other parts from external vibrations and shocks. Without the support of combined needle roller bearings, the washing machine would suffer from shaking, noise, and, in severe cases, impaired washing performance.
Guiding Role
Combined needle roller bearings also serve a guiding function. When the washing machine operates, the combined needle roller bearings ensure that the needle rollers roll in the proper direction, maintaining sufficient axial stability and rotational smoothness.
Reducing Friction Role
Since combined needle roller bearings work via rolling, and the contact area of the rollers is much smaller than that of sliding mechanisms, they reduce internal friction, increasing the machine's stability and lifespan. Moreover, combined needle roller bearings have excellent fatigue resistance, allowing for long-term operation without cracking or breaking.

Conclusion
The role of combined needle roller bearings in washing machines mainly lies in supporting, guiding, and reducing friction. They help maintain the stable operation of the washing machine and extend its service life. Therefore, during daily maintenance and care of washing machines, we should timely inspect and replace the combined needle roller bearings to ensure the machine operates normally.