Patent ID: 8313239

Claim:
An adjustable preload type linear guide system includes: a base member having a base body, and a pair of base rails which are disposed in parallel to each other on the base body; a slide member having a slide body, and a pair of slide rails which are disposed on the slide body to face the pair of base rails, wherein the slide rails slide relative to the base rails by a ball bearing which is installed between the base rails and the slide rails, thereby enabling the slide member to slide relative to the base member; and a preload adjustment unit which is installed between one of the slide rails and the slide body for adjusting the intervals and angles of the slide rails with respect to the slide body, thereby adjusting the preload of the ball bearing which is disposed between the base rails and the slide rails, wherein the preload adjustment unit comprises conical wedges that are tapered and are disposed between the slide body and the slide rails in a lengthwise direction of the preload adjustment unit and adjustment screws that adjust advancement/retreat movement of the conical wedges in the lengthwise direction of the preload adjustment unit, and the preload adjustment unit adjusts intervals and angles of the slide rails with respect to the slide body based on the advancement/retreat movement of the conical wedges.