Features and use: It suits for testing oil seal performance of all kinds of turn round type oil seal.Oil seal is putting on the tester and principal axis turns round with a certain speed.Whether the oil seal has leakage after running is important.It can test 2 pieces every time. Test axis can turn positively and negatively.The tester structure is in reason,starting performance is good,and timing range is extensive,noise is low.It suits for GB/T 14273.