Patent ID: 8251586

Claim:
A lubricating member for a linear motion rolling guide unit, comprising: a lubricating member body straddling a rail having a pair of opposing side faces, each opposing side face of the rail having a raceway section formed with a pair of mutually facing raceway surfaces, wherein the member body is capable of being impregnated with lubricant and comprises a pair of mutually facing side portions and a coupling portion connecting each of the side portions to each other, the side portions and the coupling portion being molded in one piece, wherein each of the side portions of the member body is structured and arranged to make contact with a respective one of the pair of mutually facing raceway faces of the raceway sections provided on each of the opposing side faces of the rail when the member body straddles the rail; a pair of embedding portions, each embedding portion forming either a recess or a hole in a respective side portion of the member body; and a pair of impregnation holding members, each impregnation holding member is embedded in the embedding portion of a respective side portion of the member body, is capable of being impregnated with a greater amount of lubricant per unit volume than the member body is, and has a force sucking the lubricant equal to or smaller than that of the member body, so that each impregnation holding member stores the lubricant and the lubricating member supplies the impregnating lubricant onto raceway faces of the rail while making contact with the raceway faces, wherein each impregnation holding member and the embedding portion in which it is embedded are structured and arranged to form a gap between them, the gap constituting an oil reservoir; said lubricating member including oil holes through which lubricant can be individually supplied directly to respective embedding portions; and wherein each embedding portion provided in a respective side portion of the member body has a length that is greater than the distance between the pair of mutually facing raceway faces contacted by the respective side portion.