Patent ID: 7014364

Claim:
A linear guide bearing apparatus, comprising: a guide rail including a first rolling groove which axially extends on an outer surface thereof; a main body fitted movably to the guide rail and including a second rolling groove confronted with the first rolling groove to form a load ball rolling path; inside and outside members respectively disposed on an end surface of the main body to cooperatively form a curved circulating path defined by inside and outside curved faces; a plurality of balls moving along at least the load ball rolling path and the curved circulating path; and a separator interposed between adjacent balls such that an axial line of the separator is parallel to or coincides to a straight line combining center points of the adjacent balls, the separator defining concave faces at both ends thereof in the axial direction respectively at least partially contacting spherical surfaces of the adjacent balls, wherein an outer diameter of the separator is set to have a size more than a maximum outer diameter under a condition where the balls roll while contacting with the both inside and outside curved faces of the curved circulating path, and a corner portion of the end surface of the main body at the second ball rolling groove side is chamfered to avoid interference with the separator.