According to the inherent character of the raw material the silk two-for-one twister spindle applies a structure of the rolling bearing for the upper supporter and a sliding bearing for the lower supporter,while the tension is controlled by the tesntion ball. The running balance of the spindles is tested by an internationally top advanced running balanace test instrument The yarn passage parts are made of the top wearing-resistant ceramic treated with an advanced plasm spray-coating technology.The stainless steel yarn collecting silo is of high hardness,lustre and wearing-resistant. The rotating part of the spindles is light in weight,adaptable to a speedy running. Bearing hole diameter: 9 D2: 35 D3: 130 L:67 M:M35 1.5