BEARING OIL SEAL It’s one kind of bearing seal, in particular a ball bearing oil seal. The ball bearing seal extends two round protrusions upward on one end face of a ring shape. The inner diameter of the protrusion with a smaller diameter matches the outer diameter of the inner ring of the ball bearing, and the protrusion with a larger diameter matches the outer diameter of the ball ring of the ball bearing; the inner aperture of the seal ring is not uniform It is smaller than the inner diameter of the ball bearing inner ring. It has the advantages of preventing oil from ignition, avoiding frequent oiling and simple structure. It is widely used in bearings