This paper studied the precision variation of fine shafting under the low temperature environment in detail from the aspects of material science and assembly clearance, concluded valid method to guarantee the precision of shafting under the low temperature environment.

In view of the current difficulties for measuring and valuating the assembly clearances between car door and car side , the real measurement data of car door and car side have been fitted with the aid of virtual computer assembly technique.

Aiming at laggard and low automatization degree of clearance measure method on axial assembly clearance between half shaft assembly and rear axle housing in automotive rear axle assembly,a new type clearanceometer was developed.

Study on measuring method for axial clearance of large-size four-point contact ball bearing;

Calculation of High-Speed Rolling Bearing′s Work Clearance in Loss-Lube Condition;

Analysis and Calculation of Working-play of Hybrid Ceramic Ball Bearings for High-speed Spindles;

therefore the radial play of the bearing is changed .

Aiming at the disadvantage of the maintenance scheme,it points out that the bearing windage,gear gap and contact area should be adjusted correctly during the maintenance assembly process,which is used to en- hance the assembly adjustment quality and increase the running efficiency of the equipment.