| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing seal capable of perfectly protecting a rotational speed detecting part, extremely improved in the sensibility and the durability. SOLUTION: A bearing seal composed of a magnetic sleeve 2a having a magnetic ring 2 and a seal ring 3 having a seal lip 3a, the magnetic ring 2 being arranged so as to wrap therein the seal ring 3 to integrally mount them. With this arrangement, the magnetic ring 2 is shielded from the ambient air so as to be protected from adhesion of foreign matters, lubrication oil or the like to form a precise and stable magnetic field. |
