Why the performance of plastic bearing is better than that of metal bearing


1. Development prospect of plastic bearings

At present, most customers are still willing to choice the metal bearing for the equipment. After all, when plastic bearings were not produced, metal bearings were always used as traditional materials. But so far, the performance of plastic bearings will be better and better in the future.

2.Plastic bearing materials and advantages

The production cost of plastic is lower than that of metal bearings, and the variety of plastic materials is increasingly rich and used in many industries ,the common plastic materials are nylon, polytetrafluoroethylene, polyethylene and PEEK.

The plastic bearings is versatility, economy and cleanliness . There are many low-cost materials available for various applications. Plastic bearings are usually made of thermoplastic alloys with a fiber matrix and solid lubricant, which have excellent strength and consistently low friction coefficient.

3. What is the good performance of plastic bearings ?

(1) Self lubrication

The plastic ‘s inherent characteristics, lubricates the bearings, reduces start-up delays and keeps the area clean. The tiny bit of the bearing is worn at the beginning and plays the role of lubricating the bearing, but the change of the bearing itself can be ignored. This also makes plastic bearings more suitable for food applications, because FDA strictly restricts the use of lubricants in food production machinery. In addition, although dust and other particles will stick to the lubricant and form a layer of dirt, for plastic bearings, any particles will simply be embedded in the bearing and will not affect the performance.

(2) Operation at low and high temperature

Plastic bearings can operate continuously at any temperature between - 4 ° C and 260 ° C and can withstand peak temperatures up to 600 ° F. The plastic bushing can be as strong as the metal bushing, but the bearing wall is thin, usually 0.0468 "- 0.0625" thick. Thinner walls provide better heat dissipation, resulting in greater operating range and reduced wear. In addition, thin walls are lighter and less likely to deform, making them suitable for applications with weight problems.

(3) Environmental performance

Because of the light weight of plastic, plastic bearings are more fuel efficient. Plastic bearings do not require additional coatings or additives to produce the same results as metal parts normally supplemented with harmful elements. In addition, plastic production requires only about 10-15% oil compared to the same amount of aluminum or steel.

(4) Good chemical resistance

Plastic bearings are usually more resistant to various chemicals and substances than metal bearings, and resistant to scratches and wear of metal bearings. This helps to maintain their low coefficient of friction and move smoothly with minimal interference.

(5) Maintenance free bearing

Select the correct plastic according to the use environment, and the bearing can resist corrosion over time. After installation, the plastic bearing has a long service life and does not need to be replaced. Corrosion can cause metal bearings to freeze in place, making them almost impossible to remove without cutting them off. Plastic bearings are easy to remove.

(6) Low price of plastics

Many plastics are cheaper than metals. So plastic bearings and plastic bushings can reduce costs 

Post time: Dec-21-2022