Abstract: In this slide opposite sides of a male section are supported by two sets of ball bearings for reciprocable movement in an elongate recess formed in a female section of the slide. Each set of ball bearings is supported in an elongate retainer plate which extends transversely between a pair of confronting grooves formed in the confronting surfaces of the male and female slide sections at each side of the recess. The longitudinal side edges of each retainer plate project between a pair of elongate bearing rods that are mounted in each confronting groove to have rolling engagement with the associated ball bearings. An elongate tapered gib is mounted in the bottom of one of the grooves in the male section, and has an inclined camming surface disposed in coplanar, sliding engagement with a sloping surface formed on the bottom of the last-named groove and lying in a plane which extends parallel to said grooves, and transverse to a common plane containing said retainer plates.