High efficiency: Transmission efficiency is usually as high as 90% or more (sliding screw is usually less than 50%). This means:
Smaller driving force (such as motor torque) can achieve the same output force.
Lower energy loss and heat generation.
“Reverse drive” can be achieved (that is, the force at the linear end can drive the rotating end), which is an advantage in some applications (such as vertical axis anti-drop), but the problem of insufficient self-locking also needs to be considered.
High precision and high rigidity:
By precise manufacturing and pre-loading to eliminate clearance, micron-level repeatable positioning accuracy can be achieved.
The contact area between the ball and the raceway is large and point contact, the system is highly rigid, and the deformation under force is small, which ensures the smoothness of movement and positioning stability.
Long life: Due to rolling friction, wear is extremely small. Under the correct selection, installation, lubrication and maintenance conditions, the service life is much longer than that of the sliding screw. The life is usually calculated by running distance (such as kilometers) or running time.
Low Friction and Smooth Motion: Low starting torque, smooth motion, and no creeping, making it particularly suitable for low-speed precision motion.
Excellent Synchronicity: Multiple ball screw systems driven by the same power source achieve excellent synchronized motion.