| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing having a rotating speed sensor capable of detecting rotating speed with high reliability and improving accuracy of control despite of its low price. SOLUTION: A seal body 205 is arranged on the outside of an encoder 202, a cover 204 fitting the seal body 205 is formed out of magnetic material, and because magnetic powder of high magnetic permeability is mixed in seal lips 205a, 205b, they function as a magnetic shield protecting the encoder 202 from outside strong magnetic field, and hence a sensor 203 can correctly detect the rotating speed of an inner race assembly 102. |
