This cut is a sectional view of our improved oil bush. A shows the mill spindle, B B, B B, is the collar or part that turns with the spindle and is secured firmly to it. The parts E E E E, show the upwardly projecting sleeve at some distance from and encircling the spindle or shaft, and forms the inner wall of the oil chamber. C C C C are two of the four followers or segments lined with the best anti-friction metal. The wedges N N, are raised or lowered as circumstances require by the four metal screws, two of them being shown at S S; by this means the followers and spindle are adjusted with great precision. D D D D forming the outer wall of the chamber, and E E E E its bottom and inner part, gives us a complete oil well in which the followers, collar of spindle, &c., are immersed. The operation is as follows: the rotating shaft or spindle carries with it the collar or sleeve bearing and produces centrifugal force in the chamber, by which the oil is driven up the sides of the passages and followers; the bearing is thus made to move constantly in oil. No oil can escape except when necessary to draw off at the orifice provided with the thumb screw K, when a fresh supply is needed. This simple self-oiling arrangement is the best thing in use for fast running upright bearings of any kind.