In today's high-speed development, gearbox industry has developed rapidly, more and more industries and enterprises have applied to the gearbox, and it’sstill growing. Gear box became as a wide range of industries.such industries as wind power, automobiles, Ferris wheel, bearings as key parts of the gearbox, its damage would have a large negative impact on users, indeed,bearings with high reliability is very important. To reduce maintenance costs for users, our company is committed to a variety of long life, high load bearing capacity, high reliability of research in order to meet the growing market demand.