Abstract: Three dimensional laser ablation of ceramics and steel is experimentally studied under turning configuration with an acoustic-optical Q-switched YAG laser. The depth ablated by one laser pulse is of the order of micrometer. There is no force in the process. The heat effect is small. As a result, high surface integrity can be obtained. The uncertainty of the laser ablating position along the optical ages can be restrained by shortening the focal depth of the laser beam and lowering the power density at the focal spot.

Key words: Ceramic, Dimensional accuracy, Laser ablation, Steel, Surface integrity, coupling fault, dual-disk rotor, oil film force, rubbing, sliding bearing, misaligned bearing