Linear motion guide unit

A linear motion guide unit comprising an elongated guide rail, a slider movable lengthwise of the elongated guide rail in a sliding manner, and more than one rolling element running through a load-carrying race defined between the guide rail and the slider, the rolling element being allowed to roll through a circulating circuit made up of the load-carrying race, a return passage made in the slider in parallel with the race, turnaround passages joining the race and the return passage together with one another;

• wherein the slider is provided on forward and aft end surfaces thereof with lubricant reservoirs of porous compact impregnated with lubricant, the forward and aft end surfaces being each made with a hole open to the associated turnaround passage, and the lubricant reservoirs being each provided with a nose that extends into the hole in a way exposing its tip end to the turnaround passage to define partially a wall surface of the turnaround passage, coming into rolling-contact with the rolling element rolling through the turnaround passage to apply the lubricant on the rolling element, and wherein the noses of the lubricant reservoirs exposed to the turnaround passages are each formed to have an exposed crown of elliptic figure whose major axis lies in parallel with the traveling direction of the rollers.

A linear motion guide unit comprising an elongated guide rail, a slider movable lengthwise of the elongated guide rail in a sliding manner, and more than one rolling element running through a load-carrying race defined between the guide rail and the slider, the rolling element being allowed to roll through a circulating circuit made up of the load-carrying race, a return passage made in the slider in parallel with the race, turnaround passages joining the race and the return passage together with one another;

• wherein the slider is provided on forward and aft end surfaces thereof with lubricant reservoirs of porous compact impregnated with lubricant, the forward and aft end surfaces being each made with a hole open to the associated turnaround passage, and the lubricant reservoirs being each provided with a nose that extends into the hole in a way exposing its tip end to the turnaround passage to define partially a wall surface of the turnaround passage, coming into rolling-contact with the rolling element rolling through the turnaround passage to apply the lubricant on the rolling element, and wherein the lubricant reservoir is made up of a major plate bored with a hole, and a nose made separately from the major plate, followed by fitted into the hole in the major plate.