The magnetic fluid is connected by filling, and the front end of the shell is provided with a thread, which is buried in the vacuum chamber hole and fixed by tightening the nut.
The two ends of the shaft, one end of the shaft is connected to the atmospheric end drive unit, and the other end of the shaft is connected to the mechanism in the vacuum chamber, which keeps the transmitted torque and the vacuum seal
It is suitable for vacuum environment with room temperature and low torque