Based on theory analysis of the rolling coupling and roller coupling, it is known when rolling coupling axis direction displacement, radial displacement and angle error are compensated, the rollers are rolling on the rolling path and the abrasion of rolling is slight, the friction force and the add-moment and power consume are small which will not influence the equipment performance.

The rolling-ball coupling is a kind of new and high-efficiency drive part.

This paper analyzes the mechanism of the rolling-ball coupling being destroyed and calculates its load capability by using the finite element method, which is quite advanced.

While the analysis on rolling coupling shows that when r.

Based on theory analysis of the rolling coupling and roller coupling, it is known when rolling coupling axis direction displacement, radial displacement and angle error are compensated, the rollers are rolling on the rolling path and the abrasion of rolling is slight, the friction force and the add-moment and power consume are small which will not influence the equipment performance.

The ball bearing is widely used in aero-engines.

The high-speed ball bearing-outer rotor system is applied spreadly in the field such as high-speed machine tool, fans and mechnical gyro motor.

A certain type of marine main power system ball bearings ball fracture was analyzed on the ball made chemical composition,hardness and microstructure analysis,analysis of the material properties ball was not in line with orders technical conditions require.