| 摘要 |
Outer peripheral portions of magnetizing terminals 39a constituting a magnetizing apparatus 33a for magnetizing a permanent magnet 32, are made longer than inner peripheral portions. Coils 40 for magnetization are wound around the shorter length inner peripheral portions. A distance L32 between the magnetizing terminals 39a and a step portion 37 of a support ring 34 can thus be shortened, so that the axial length of the encoder 31a can be reduced. This results in reducing the axial length of an encoder 31a to thereby miniaturize and lighten a speed sensing rolling bearing unit incorporating the encoder 31a. <IMAGE> |
