Oil-free bearing classification
Oil-free bearings according to product structure can be divided into solid inlaid bearings, composite bearings, oil-bearing, a new single-bearing lubrication materials.
Solid inlaid bearings
Common is to solid lubricants graphite (black lead), polytetrafluoroethylene (PTFE), molybdenum disulfide and other embedded inlay process using high-strength brass, tin bronze, aluminum bronze, cast iron or GCr15 other alloy materials. It breaks through the limitations of general sliding bearings rely on oil film lubrication. In the process of using, the friction between the solid lubricant and the friction shaft to form oil coexist lubrication features, both to protect the shaft is not worn, but also make the solid lubrication characteristics of eternity. High-strength brass bearing oil hardness doubled than the average copper, wear resistance is also doubled, high bearing capacity.
Common composite bearings by the two layers of steel and copper powder combination (bimetallic), or from steel, copper powder layer, self-lubricating materials (PTFE, PEEK, POM) and three layers of filler material composite. Such oil-free bearings using high-temperature sintering process of self-lubricating material bonded to the steel, both to ensure the lubrication performance of the product surface, but also to ensure the structural stability of the bearing and carrying capacity.
Oil-bearing made of metal materials, production of bearing refueling process, and the oil seal in the bearing, the use of "self-lubricating" effect. As the bearing contains lubricating oil, it has good lubricity, but also to avoid the oil maintenance work.
New single-bearing lubrication material
The new single-bearing lubricants common resin, ceramic, tungsten carbide bearings, etc., and there are constantly new materials have been developed, but such oil-free bearings may have high cost, suitable for narrow surface and so on, can not be large Area promotion.