1, inch tapered roller bearing 2, ABEC-1,material:bearing steel 3, 30202 to 30218,30303 to 30318 4, 32004X to 32018X, 1, inch tapered roller bearing2, ABEC-1,3, material:bearing steel4, 30202 to 30218,5, 30303 to 303186, 32004X to 32018X,7, LM1749/10 L68149/10,8, 3778/20,etc. inch tapered roller bearing