The higher the porosity of the powder metallurgy bearing, the more oil storage, but the more the porosity of the diesel engine, the lower the strength.
This type of bearing is often in a mixed lubrication state, and sometimes powder metallurgy bearings can also form a thin film lubrication, commonly used to supplement the oil difficult and light load and low speed situation.
According to different working conditions, the use of different oil content of the powder metallurgy bearings. Oil content is high, can be used in the JTW self-lubricating gasket without additional lubricants and low load applications; oil content is small, can be used in heavy load and high speed; graphite powder metallurgy bearing, because the graphite itself is lubricated, Can improve the safety of the bearing, the drawback is the lower strength; in the case of non-corrosion, may consider the use of inexpensive, high strength iron-based powder metallurgy bearings, but the corresponding journal hardness should be appropriate to improve.