Linear motion guide unit with lubricating means

摘要

A linear motion guide unit is provided in which rolling applicators (40) transfer lubricant from a lubricant-containing member (43) to raceway grooves (4) on a track rail (2) to make less sliding-friction resistance to a sliding element (1). The lubricating means (15) has a case (21) accommodating therein the lubricant-containing member (43), and rolling applicators (40) supported for rotation by bearing means (33) in the case (21). The lubricant (41) held in the lubricant-containing member (43) is applied onto the raceway grooves (4) on the track rail (2) through the rolling applicators (40), the peripheries of which are kept in sliding contact with the lubricant-containing member (43), thereby lubricating the confronting raceway grooves (4) of the track rail (2) and the sliding element, along which rolling elements run through in the sliding element. The frictional resistance that is encountered when the rolling element run through the track rail (2) is the frictional resistance to rolling motion, which makes less the sliding resistance to the sliding element.