The slewing bearing used by the excavator is a single-row ball slewing bearing, and the teeth are quenched. The main function is to support the upper cab and the mechanical arm and other mechanisms, and to control the rotation of the cab and the mechanica
Carbon and aramid hybird fabric is made of 3K carbon fiber and 1500D colored aramid fiber, in different weaving pattern. Such as Plain, Twill, W pattern, I pattern and ect.