The ball screw pair must be equipped with protective equipment to prevent dust or other impurities from entering the ball screw pair. If the ball screw pair is exposed outside the machine tool, a closed protective cover must be used, such as a spiral spring steel strip sleeve or a folding sleeve. When installing the protective cover of the equipment, it is necessary to connect one end to the side of the ball nut, while the other end needs to be fixed on the support seat. If the ball screw pair is in a concealed position, a sealing ring needs to be used for protection. When installing the equipment, the sealing ring needs to be installed at both ends of the nut. The touch type elastic sealing ring is mainly made of nylon, and its inner hole is made similar to the shape of the screw thread raceway. This type of sealing ring has a very good dustproof effect, but due to its touch pressure, it will increase the friction force. Try to avoid collisions with protective equipment during work to prevent damage.