... Therefore, and parallel use a pair of straight line roller liner, compared to achieve a more compact ... fixed load, the ball was designed to 45 ° line up of the antenna, and of course use what ... optical axis, hollow shaft, ball screw, locking nut, machine tool accessories, CF bearing, pneumatic components, our company have a ... screw, drag chain, etc.! HRW35CAM , THK rail ,the motion of linear guide