1847 J. Bourne 242 If the bearing heats..from the stopping of the oil hole or otherwise, the metal will be melted out.
1894 R. O. Heslop Riper, an iron prong used for clearing dirt and dust out of the oilholes in machinery.
1994 5 Nov. e 1/1 Use a wire or small screwdriver to clean the oil holes in the guide-bar and the guide-bar slot.