The most commonly used oil bearing is powder metallurgy oil-bearing. Through the preparation of powder, forming, sintering, and impregnation of lubricating oil and other major processes made of the bushing are called powder metallurgy oil-bearing. 

Then how to calculate the powder weight of powder metallurgy oil-bearing bearing?

Metal powder is the main raw material of sintered body made by powder metallurgy, it is porous, and has the advantages of free adjustment of the number, size, shape, and distribution of pores in the manufacturing process. Using the porosity of the sintered body, it can be soaked with 10%~40% (volume fraction) of lubricating oil, which can be used under the condition of oil supply. When running, the temperature of the bearing rises, because the expansion coefficient of the oil is larger than that of the metal, it automatically enters the sliding surface to lubricates the bearing, and when it stops working, the oil is sucked back into the pores with the temperature dropping. The oily bearing has the characteristics of low cost, vibration absorption, low noise, no need to add lubricating oil in a long working time, especially suitable for the working environment which is not easy to lubricate or is not allowed to have dirt. Porosity is an important parameter of oil-bearing. Oil bearing working at high speed and light load require high oil content and high porosity. Oil bearing working at low speed and under large load requires high strength and low porosity. This kind of bearing was invented in the early 20th century. Because of its low manufacturing cost and convenient use, it has been widely used. Now it has become an indispensable basic part of the development of various industrial products such as automobiles, home appliances, audio equipment, office equipment, agricultural machinery, and precision machinery. Oily bearing is divided into copper base, iron base, copper iron base, etc.

Powder metallurgy oil bearing (oil-bearing) is a kind of porous alloy product with lubricating oil in the pores. When the shaft rotates, the friction between the shaft and the oil-bearing causes the temperature of the oil-bearing to rise and the pumping action. Lubricating oil leaks out of the friction surfaces of the inner or outer diameters of the oil-bearing when the shaft stops rotating. The lubricating oil flows back into the bearing. Therefore, the consumption of lubricating oil is very small and can be used for a long time without an external supply of lubricating oil. Very suitable for oil supply difficulties and avoid lubricating oil pollution occasions. Powder metallurgy oil bearing (oil-bearing) is a kind of porous alloy product with lubricating oil in the pores. When the shaft rotates, the friction between the shaft and the oil-bearing causes the temperature of the oil-bearing to rise and the pumping action. Lubricating oil leaks out of the friction surfaces of the inner or outer diameters of the oil-bearing when the shaft stops rotating. The lubricating oil flows back into the bearing. Therefore, the consumption of lubricating oil is very small and can be used for a long time without an external supply of lubricating oil. Very suitable for oil supply difficulties and avoid lubricating oil pollution occasions.