Teflon Bushing Rated for heavier loads then bronze bushings. Instead of using oil-impregnated bronze or rubber-encased bushings, the company opted for teflon self-lubricating steel bushings, which are rated for heavier loads, easier to install, less expensive, and longer lasting. They are also better suited to the harsh environmental conditions, since they are completely dry running and dirt resistant.
The fabric provides high compressive strength while the resin/ PTFE wear coating provides the low coefficient of sliding friction. The bond side of the liner is coated with a high temperature resin only. Stainless steel-backed bushing a woven fabric where PTFE fibers are woven with other supporting and bondable fibers. The process used to produce the PTFE fibers results in a fiber, which has 25 times the tensile strength of that of the base resin. The weave of the fabric exposes the PTFE fibers on the working surface. The supporting fibers are interwoven with the PTFE fibers and are predominantly exposed on the surface that is bonded. This construction provides positive locking of the PTFE fibers for strength and resistance to cold flow. It also provides a high-strength bond to the backing material of the bearing. It provides positive locking of the PTFE fibers for strength and resistance to cold flow; a bearing surface, that is almost entirely PTFE; and a high strength surface, that is bonded to the backing material of the bearing.
Porous metal materials are bearing materials made of different metal powders by pressing and sintering. The material is porous, with pores accounting for about 10%~35% of the volume. Before use, the bearing bush is impregnated in hot oil for several hours, so that the pores are full of lubricating oil. Therefore, bearings made of this material are usually called oil-bearing and have self-lubricating properties.
When working, due to the suction effect of the rotation of the journal and the expansion of the oil when the bearing is heated, the oil enters the friction surface for lubrication; When not working, because of the capillary action, the oil will be sucked back to the inner bearing, so for a long time, even without lubricating oil can still work very well. If regular oil supply, the use effect is better.
But the toughness of porous metal material is small, only suitable for stable no impact load and medium and low speed. Commonly used are porous iron and porous bronze. Porous iron is commonly used to make mill bushings, machine tool oil pump bushings, internal combustion engine CAM bushings, etc. Porous bronze is used to make bearings for record players, electric fans, textile machinery and car generators.