Cylindrical bearing with solid lubricant embedded and fixed in inner peripheral surface thereof

摘要

A cylindrical bearing with a solid lubricant embedded and fixed in a plurality of first and second helical grooves formed in an inner peripheral surface thereof, wherein each first helical groove is formed with a rightward rising inclination at an angle theta 1 of more than 0 DEG and not more than 45 DEG with respect to a reference line, while each second helical groove is formed with a leftward rising inclination at an angle theta 2 of more than 0 DEG and not more than 45 DEG with respect to the reference line, a line which connects shorter diagonal lines of parallelograms each formed by connecting points of intersection of adjacent ones of the first helical grooves and adjacent ones of the second helical grooves intersecting with the adjacent ones of the first helical grooves forms an angle theta 3 of less than 90 DEG with respect to the reference line.