BEARING WITH MAGNETIC ENCODER

摘要

PROBLEM TO BE SOLVED: To provide a bearing with a magnetic encoder which can prevent the occurrence of the rust on a multipolar magnet. SOLUTION: The magnetic encoder 20 is installed at a ring on a rotation side of an anti-friction bearing, which is either an inner ring or an outer ring. The magnetic encoder 20 is arranged inner than an end face of a fixed side ring at the space between the inner ring and the outer ring. The magnetic encoder 20 has a multipolar magnet 14 alternately forming magnetic poles in the circumference. The multipolar magnet 14 is solidified by mixing magnetic powder into it. The multipolar magnet 14 is covered with a rustproofing treatment layer 30. COPYRIGHT: (C)2005,JPO&NCIPI