What is the difference between metal bearings and plastic bearings? Material differences in the use of bearing products into plastic and metal class, although in the actual work of the basic function is the same, but in the end is the difference between the two types of bearing products, you can see that there are still great differences. You can distinguish from the following.
Obviously the weight of plastic must be lighter than that of metal, so plastic bearings are manufactured to a higher level of quality and are more capable of meeting the design standards of lightweight products.
Plastic bearings are generally produced by injection moulding, which is a simple process suitable for mass production, while metal bearings need to go through casting and other related processes, which is complex and causes metal bearings not to meet the standards of mass production.
Plastic bearings are not affected by environmental factors, even if they are used in harsh environments, resulting in rust, corrosion and other abnormalities. In contrast, metal bearings cannot be guaranteed in this respect, as they are susceptible to reaction with acids and alkalis, resulting in rusting.
The excellent performance level, coupled with the fact that the whole is made of lubricating materials, causes plastic bearings to have a long service life, while the lubricating material on the surface of metal bearings will be affected if the lubricating material is rubbed.
1 .Copper sleeve, which is generally thought of, processed with copper rods, traditional craftsmanship, and requires lubricating oil. The advantages are common, easy to process, and can be made in various sizes, but the problem is that copper is relatively expensive and requires maintenance.
2 There are about 3 kinds of self-lubricating metal bearings, copper embedded graphite (the processing technology is troublesome, the price is not cheap, graphite cannot be used in some industries), DU sleeve (the inner surface is coated with PTFE, etc., the cost is low and cheap, and the market How good is it to purchase, but the coating is too thin and easy to wear and has a short life), powder metallurgy sleeve (low price, sintered with waste metal powder, lubricating oil has invaded in it, it is not actually an oil-free sleeve, only when rotating at high speed to form oil film lubrication).
