Effect of Surface Condition of Lip on Sealing Phenomena of Oil Seals 780405

It becomes clear that the suction coefficient of oil, K, and the sealing characteristic constant, Φ (=fG^-1/3), are closely connected with the rubbing surface state of oil seals. And, investigations have done on K-, Φ-value, etc. in oil seals after the practical use in automobiles and the results have been compared with the test results in the laboratory.