What is pulley wheels with bearings?

Pulley wheels with bearings are used for rollers. The roller is the rolling friction between the outer circle of the bearing and the track. For example, the track of heavy-duty rollers has certain wear resistance and needs to be lubricated, such as heavy-duty rollers for forklift masts, Telescopic fork rollers, etc.; to ensure that the outer ring of the bearing is not broken, the outer ring of the bearing needs to be thickened Design. The hard bearing outer circle is easy to grind and damage the track, so the outer surface hardness of the outer ring of the heavy-duty roller needs to be reduced, or made into a drum-shaped structure. For ordinary load rollers, the usual method is to make a shell, and then press the standard bearing into the shell, and the outer circle of the shell will roll and rub against the track. This avoids costs like making heavy duty rollers. Light load rollers, pulley wheels with bearings came into being. Plastic has certain self-lubricating properties, low coefficient of friction, low calorific value, rolling on the track will not wear the raceway. The pulley wheels with bearings are simple in structure, easy to process, and high in mass production efficiency. Pulley wheels with bearings are used in a wide range of applications, such as roller skating, furniture, baby carriages, automotive tensioners, beverage processing equipment, printing equipment, logistics equipment, etc. We can manufacture various plastic-coated bearings according to different needs of customers. Hundreds of plastic-coated bearings are provided for various industries.

Pulley wheels with bearings are covered with a layer of plastic on the outside of the bearing. The plastic material is generally nylon PA, ABS polyoxymethylene POM and engineering plastics polypropylene, PP, PU, PV, etc. Plastic has certain softness, impact resistance, friction resistance and certain self-lubricating type. With the rise of the plastics industry, there are various plastic materials with different hardness for us to choose from on the market. According to different application conditions, pulley wheels with bearings can choose a variety of plastics with different hardness. If the casters need to bear the weight, the plastic used needs to be harder. The crib needs to improve the anti-vibration performance and needs to be soft. Let's discuss the process requirements of plastic-coated bearings together.

In the Pulley wheels with bearings process, the bearings are usually made and then placed in the injection mold for injection molding. Then the bearings have the following requirements:

The temperature resistance of the bearing, the bearing sealing cover and the grease resistance temperature must be higher than the temperature of the injection mold. In order to avoid aging of the sealing cover or oil leakage.

The sealing performance of the bearing, in the injection molding process, the environmental factor has dust or dirt, and the bearing will be polluted. If the sealing performance of the bearing is not good, the foreign matter intrusion into the bearing will affect the rotation flexibility of the bearing. The metal sealing cover is most likely to be invaded by foreign matter, and most plastic-coated bearings are metal sealing covers, so the metal sealing cover needs to have a "V" shape on the inner ring, and at the same time, keep the injection molding environment clean.

If you need any brand bearings or any models of bearings, please contact me!

Contact: Grace
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