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THK linear motion systems are unique motion systems in which linear motion is supported by rolling contact elements. These linear motion systems can best be described as a motion system which uses the rotational motion principle of a deep grooved ball bearing. This principle makes it the easiest to use and most economical of all rotational motion bearings.
Since the balls employed as rotating elements are set in raceways having an almost equal radius to the balls that rotate in them, the contact between the balls and the circular arc raceway is changed from conventional point contact to a line contact. This line contact system means that THK LM Guides can handle 13 times the work load and last 2,200 times longer than conventional linear guide ways (round shafts) of the same ball diameter.
