Abstract: A linear motion guide unit has a track rail of a pair of side walls on which raceway grooves are formed. In the depths or bottom of the raceway grooves there are cut deeply relief flutes, one to each raceway groove, where retainer bands to keep rolling elements against coming apart are allowed to step aside therein. The raceway groove is made in so specific form as to make it possible to produce the raceway groove and do the relief flute at the same time. The retainer band is installed in the slider, with stepping aside in the relief flute for linear movement relative to the track rail as the slider travels along the track rail. The relief flute is cut in a fashion at least one lengthwise flank thereof on the side nearer the upward opening between the side walls of the track rail is made slantwise to provide a tapered flank because of which the relief flute can be produced together with the associated raceway groove at a single process.

Abstract: A linear motion guide unit makes it possible to mount precisely a track rail to a machine bed and also reduce sliding resistance that might be encountered when a slider moves over the track rail. On a sidewise outside surface of a side wall of the track rail there is made a bulged portion that spreads in width H from a lower surface of the side wall up to a level above the center of gravity G of the track rail. The bulged portion has a sidewise outermost surface that is processed to provide a surface of reference, which can match a mating surface of reference made on the fixed bed. The slider has an upper seal to close a clearance left between a fore-and-aft side of the slider and a lengthwise inside surface of any one of the side walls of the track rail, while a recess is cut in the inside surface of the side wall in a way extending lengthwise of the track rail so as to allow the upper seal to come in sliding contact at a lip thereof with the recess.

Abstract: A linear motion guide unit has a track rail of a pair of side walls on which raceway grooves are formed. In the depths or bottom of the raceway grooves there are cut deeply relief flutes, one to each raceway groove, where retainer bands to keep rolling elements against coming apart are allowed to step aside therein. The raceway groove is made in so specific form as to make it possible to produce the raceway groove and do the relief flute at the same time. The retainer band is installed in the slider, with stepping aside in the relief flute for linear movement relative to the track rail as the slider travels along the track rail. The relief flute is cut in a fashion at least one lengthwise flank thereof on the side nearer the upward opening between the side walls of the track rail is made slantwise to provide a tapered flank because of which the relief flute can be produced together with the associated raceway groove at a single process.

Abstract: A linear motion guide unit makes it possible to mount precisely a track rail to a machine bed and also reduce sliding resistance that might be encountered when a slider moves over the track rail. On a sidewise outside surface of a side wall of the track rail there is made a bulged portion that spreads in width H from a lower surface of the side wall up to a level above the center of gravity G of the track rail. The bulged portion has a sidewise outermost surface that is processed to provide a surface of reference, which can match a mating surface of reference made on the fixed bed. The slider has an upper seal to close a clearance left between a fore-and-aft side of the slider and a lengthwise inside surface of any one of the side walls of the track rail, while a recess is cut in the inside surface of the side wall in a way extending lengthwise of the track rail so as to allow the upper seal to come in sliding contact at a lip thereof with the recess.