Ball Screws Online for Sale in South Africa | DIY Geek

Using ball screws are vital when working in the world of robotics. These screws work as mechanical, linear actuators that help to translate rotational motion to linear motion. Various sizes are available to ensure you’re able to accomplish specific tasks. Further, the screws are able to withstand high thrust loads, minimizing the amount of internal friction that they deal with. The ball assembly within the screw serves as the nut while the threaded shaft is the screw itself. With so many different designs, you can ensure that you’re able to apply the correct load and stay within a close tolerance so that it can be used for a specific type of project.

Another form of linear actuator based on a rotating rod is the thread-less ball screw, a.k.a. “rolling ring drive”. In this design, three (or more) rolling-ring bearings are arranged symmetrically in a housing surrounding a smooth (thread-less) actuator rod or shaft. The bearings are set at an angle to the rod, and this angle determines the direction and rate of linear motion per revolution of the rod. An advantage of this design over the conventional ball screw or lead screw is the practical elimination of backlash and loading caused by pre-load nuts.

Ball screws are used in aircraft and missiles to move control surfaces, especially for electric fly by wire, and in automobile power steering to translate rotary motion from an electric motor to axial motion of the steering rack. They are also used in machine tools, robots and precision assembly equipment. High precision ball screws are used in steppers for semiconductor manufacturing.