The advantages of ball screws include:
The rolling friction coefficient is small, resulting in high transmission efficiency, which can exceed 90%, with a friction coefficient f ranging from 0.002 to 0.005;
(2) The friction coefficient has little relation to speed, so the starting torque is close to the running torque, resulting in relatively smooth operation;
(3) Minimal wear and long service life, with adjustable clearance via a regulation device, enhancing both transmission accuracy and rigidity;
(4) It lacks self-locking capability and can convert linear motion into rotational motion.
The disadvantages of ball screws include:
(1) Complex structure, difficult to manufacture;
(2) In mechanisms where reverse rotation must be prevented, a self-locking mechanism should be incorporated;
(3) The load-bearing capacity is not as great as that of sliding screw transmission.
