Rolling bearing in operation may occur when the failure forms of various types, but the rings and rolling fatigue pitting surface is one of the most basic and common failure forms of rolling bearing, is usually calculated as the basis for the life of rolling bearings. Bearing corrosion damage, in operation often appear vibration, noise and heat phenomenon of strong. The life of rolling bearing is a bearing or ring first appeared before pitting corrosion, bearing speed or the corresponding operating hours. Bearing capacity calculation of rolling bearing is mainly refers to the bearing life calculation. As with the fatigue life of the general structure, discrete fatigue life of rolling bearing is also quite large (see chart 1). Project definition has the bearing life 90% reliability as the basic rating life bearing. In engineering practice, usually the capacity in the basic rating bearing dynamic load to measure a bearing. Basic rated the so-called bearing dynamic load refers to: the basic rating life bearing exactly 1000000 rpm, load bearing can bear the value, with the letter C A rolling bearing the basic rating life (L rated life calculation formula. Pf168.com 10) and basic rated dynamic load C bearings, bearing the external load (equivalent dynamic load P) and so on, can be based on An important content of calculation of the rolling bearing life is equivalent dynamic load calculation and axial force F. Because of the failure mode of bearing not only pitting, and calculate the bearing life is mainly aimed at the pitting life of bearing, so the life of bearing and real life will have a certain gap. In order to reduce this gap, should ensure that the bearing is installed correctly, reasonably and maintain the bearing lubrication good operating environment and so on. The essential purpose of the bearings, can be taken online monitoring and fault diagnosis of measures in use, timely find and replace failure of bearing fault. The calculation of a