A linear guide is a machine element that utilizes bearings, which were developed for rotary motion, in order to move heavy objects easily in a straight line. It is referred to as a “recirculating linear ball bearing” by ISO and JIS, and “linear guideway” by the Japan Machine Tool Builders' Association. THK CO., LTD.

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.

Ball bushings are one of many types of linear bearings that are designed to provide support to linear motion shafts in mechanical machinery.

Linear shafts are long, rod-shaped devices that provide linear motion for different applications. Linear motion applications are found in the medical, aerospace, packaging and industrial sectors and more. A better shaft equals better performance.