Linear ball screw is an alternative label for standard ball screws. All ball screws are members of the linear actuator category, and can also be called linear ball screws. A linear actuator is an tool which changes turning motion to straight line motion.
A ball screw is made of a screw, a ball screw nut, and a set of ball bearings inside the ball screw nut. There are extra parts that can optionally be included, but these parts are the most important, along with the recirculation system. The linear ball screw operates as a linear actuator using the following process. When the screw turns, the ball screw nut travels downwards on the screw shaft. This is how turning motion within the tool becomes linear movement by applying the mechanics of the linear ball screw.
The actual workings within linear ball screw assembly is that the turning of the screw compels the ball bearings contained in the ball screw nut to start to roll. These ball bearings are laid out along the threads inside the casing of the ball screw nut, which are also aligned with the threads of the screw. When the ball bearings begin to roll along the threadways withing the linear ball screw, this forces the ball screw nut to start travelling linearly. It follows that when the ball bearings roll down the raceways of the turning screw, the ball screw nut is transported with them.
Linear ball screws are available in a variety of types. It is possible to purchase either rolled or ground linear ball screws, that usually have extremely different levels of accuracy. Linear ball screws tend to vary in design, with most of the variations occurring in the area of the ball screw nut. Linear ball screws can be applied in a variety of ways, which in general involve complicated machinery.
It is crucial that the ball screw assembly be kept clean. Minute particles or dirt will affect the behaviour of the ball screw.