August 27, 2020
The powder metallurgy bearing is bearing with porous, mainly metal powder as raw material, using sintering parts produced by powder metallurgy, it can freely adjustment the number of pores, the size, the shape and the distribution and etc. So what’s advantage of powder metallurgy bearing? Let SINTS company to introduce it:
the advantage of powder metallurgy bearing
Powder metallurgy bearing called oiled bearing, when in a non-operational status, the lubricant oil of bearing are fill in its pores, when in a operation status, the shaft rotation is heated by friction, and the thermal expansion of the bearing shell reduces the porosity, so, the lubricant oil will overflow and get into the space of bearing. After shaft stop rotation, the bearing bush cooled, the lubricant oil will return holes. The bearing possible form completely oil slick, but in most of occasion, this kind of bearing is in non-completely oil slick.
The powder metallurgy bearing have characteristics of low-cost, vibration absorption, low noise, no need lubricant during long work time, especially suit to non-oil and non-lubricant work environment. Porosity is an important parameter for oil-impregnated bearings. The oil bearing under high-speed require more oil content, higher porosity; the oil bearing working at low-speed require high strength, low porosity.
This kind of bearing was invented in the early 20th century. Due to its low manufacturing cost and convenient use, it has been widely used. Now it has become an indispensable development of various industrial products such as automobiles, home appliances, audio equipment, office equipment, agricultural machinery, precision machinery, etc. A type of basic part.