The characteristics and application fields of micro bearings

Bearings are an important component of modern mechanical equipment. Its main function is to support the mechanical rotating body, reduce its friction coefficient during 

movement, and ensure its rotational accuracy. According to the different friction characteristics of moving components, they can be divided into rolling and sliding. Can 

withstand both radial and axial loads simultaneously. Can work at a higher speed. The larger the contact angle, the higher the axial bearing capacity.

Micro bearings are widely used in electric tools, cars, motorcycles, etc. They have the characteristics of high precision, low noise, flexible rotation, and long service life. The 

products are required to be produced according to the standards of micro bearings and are widely used in industries such as air conditioning motors, washing machine motors, 

various micro motors, fitness equipment, telecommunications equipment and instruments, computers, automotive motors, etc. In recent years, silent (low noise) bearings have 

been mass-produced, and their quality and technical indicators have reached the level of similar imported products, and have been recognized and adopted by many famous 

motor manufacturers.

1、 The development history of micro bearings:

The early form of linear motion bearings was to place a row of wooden rods under the pry plate. This technology may be traced back to the construction of the Great Pyramid 

of Giza, although there is no clear evidence yet. Modern linear motion bearings use one working principle, but sometimes use balls instead of rollers.

2、 The characteristics and main functions of miniature bearing cages

A miniature bearing cage refers to a part that partially wraps all or part of the rolling element and moves with it. It can isolate rolling elements and usually guide them to remain 

in the bearings.

3、 Types of miniature bearing cages

1. The punch holder is lightweight and has a large internal space, making it easy for lubricants to enter;

Solid cages can usually provide higher speeds. When bearings have other forms of motion besides rotation, especially during high-speed operation, machined metal cages 

should also be used;

3. The pillar holder is threaded through perforated rollers with pins, and both ends of the pins are fixed on washers. Lightweight and capable of accommodating more rollers, 

only used for ultra large roller bearings.

4、 The main functions of miniature bearing cages

1. Maintain an appropriate distance between rolling elements to prevent them from coming into contact with each other and reduce friction;

2. Make the rolling element evenly distributed, so that its load is evenly distributed;

3. Guide the rolling elements in the unloaded area to improve the rolling conditions in micro bearings and prevent destructive sliding.

The retainer must withstand the stress generated by friction, strain, and inertia, as well as the chemical corrosion of lubricants, additives in lubricants, or substances generated 

by their aging, organic solvents, or coolants. Therefore, the design and materials of the cage play an important role in the performance and reliability of micro bearings.