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Plastic bearings can generally be divided into plastic rolling bearings and plastic sliding bearings; the working principle of plastic rolling bearings and plastic sliding bearings can be distinguished by their names. The friction that occurs when plastic rolling bearings is working is rolling friction, while plastic sliding bearings occur when they work. It is sliding friction; the magnitude of rolling friction is mainly determined by manufacturing accuracy; and the magnitude of friction of plastic sliding bearings mainly depends on the material of the sliding surface of the bearing.


Plastic sliding bearings have the following characteristics:

1. The whole plastic bearing is made of lubricating material, with long service life;

2. Plastic bearings will not rust and are resistant to corrosion during use, while metal bearings are easy to rust and cannot be used in chemical liquids;

3. The quality of plastic bearings is lighter than metal, which is more suitable for modern lightweight design trends;

4. The manufacturing cost of plastic bearings is lower than that of metals; plastic bearings are processed by injection molding and are more suitable for mass production;

5. The plastic bearing has no noise during operation and has a certain vibration absorption function;

6. Plastic sliding bearings are suitable for high and low temperature work -200~+250 degrees;

Plastic sliding bearings can not only be made into the shape of bushings, but also plastic linear sliding bearings, but the prerequisite is that the materials made must be self-lubricating to improve their comprehensive wear resistance; for example, the common plastic linear bearings in the market The material is made of engineering plastics modified by lubricants and reinforced fibers, and its wear resistance is very good;

POM plastic bearing, PP plastic bearing

POM and PA materials have good mechanical strength and wear resistance, and are suitable for making more precise plastic bearings. The working temperature is from -60°C to 100°C. The surface strength is high and smooth, and there is basically no tension. It has good self-lubrication. Performance and low coefficient of friction, on the basis of maintaining the traditional advantages of plastic bearings, can be applied to precision and higher speed operation. Among them, POM plastic bearings are the most widely used of all plastic bearings. Generally, the inner and outer ball materials are made of POM or PA, and the cage is made of glass fiber reinforced nylon 66 (GRPA66-25). The balls are glass balls, stainless steel balls or ceramic balls. This kind of bearing performs well in alkaline environment but is not suitable for operation in acidic corrosive environment.

characteristic:

1. High rigidity, high hardness, high impact strength even at low temperature;

2. Excellent elasticity and good creep resistance;

3. High heat stability and very good dimensional stability;

4. Good sliding performance and wear resistance;

5. Physiologically inert, suitable for contact with food.

6. Not resistant to strong acids and strong oxidants, poor adhesion to paint

The main purpose:

Mechanical and electrical equipment, fitness equipment, food machinery, furniture and decoration building materials

HDPE, PP, UPE materials have been proved to be able to be used in relatively weak acid-base cross environment (30% Cucl2 solution and 30% NaoH solution test OK), so it is suitable for most acids/alkali/salt/solvent/oil/gas and Seawater corrosive environment. It has the oil-free, self-lubricating, anti-magnetic and electrical insulation properties of general plastic bearings, but it has low mechanical strength and is easy to deform. Therefore, this type of acid and alkali resistant plastic bearings are not suitable for larger loads and higher speeds. In order to overcome this type of acid resistance Disadvantages of alkali plastic bearings. In comparison, the use of UPE material has better strength, low friction characteristics and low temperature application characteristics (as low as -150℃). Generally, the inner and outer ring materials are HDPE, PP or UPE, and the cage material is HDPE, PP or UPE, the ball is glass ball, stainless steel ball or ceramic ball. In this way, the overall performance of the acid and alkali resistant bearings will be greatly improved.

characteristic:

1. Good corrosion resistance, resistant to various corrosive media and organic media within a certain temperature and concentration range

2. High mechanical strength, cutting ability to maintain high toughness at liquid nitrogen temperature (-196℃)

3. Good self-lubricity, high wear resistance

4. Strong anti-adhesion ability

5. Very low water absorption, excellent electrical insulation

6. Good resistance to high-energy radiation

The main purpose:

Mechanical and electrical equipment, fitness equipment, food machinery, furniture and decoration building materials

PTFE high temperature and corrosion resistant plastic bearings

As emerging engineering plastic materials, PTFE and PI have been proven to have better mechanical strength, dimensional stability and high temperature resistance among all known engineering plastics. Among them, PTFE has a long-term use temperature of 260°C, and PI has a long-term use temperature of 300°C. And it has excellent corrosion resistance, and it can still operate freely in a medium-strength acid-base corrosive environment. Therefore, it is generally used to make the outer ring material to choose PTFE or PI, and the balls are generally Zro2 or Si3N4 ceramic balls.


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