Single-direction and double-direction angular contact thrust ball bearings (Figures 1.50 and 1.51) are used for machine tool spindles requiring rigid axial guidance.
单向和双向推力角接触球轴承（图1.50和1.51）都用机床主轴轴向刚性作为指导。
2
The micro linear feed of the fast tool servo is real-time calculated with the use high resolution angular feedback on the swing tool based on the aspheric equation.
快速刀具伺服微型线性饲料是实时计算，使用高分辨率的角速度反馈秋千上的工具，基于非球面方程。
3
A method for roll angular error measurement of NC machine tool vertical axis was studied based on straightness measurement using laser interferometers system.