摘要:
Apparatus for feeding lubricating oil to the surface of a rotating element, such as the thread of a reversible thread roller including a shaft fixed to the rotating element which has a cylindrical bore and at least one radial passage opening from the bore to said surface, an enlarged ring freely supported on the shaft, and means defining a friction surface against which the ring engages to transfer oil from the ring to the bore and thence through the passage as a result of centrifugal force. An oil sump is provided below the rotating element into which a portion of the ring projects at all times.