MAGNETIC ENCODER AND BEARING FOR WHEEL EQUIPPED WITH THE SAME

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PROBLEM TO BE SOLVED : To provide a magnetic encoder capable of securing a magnetic force for stable sensing and achieving low cost, superior in corrosion protection and productivity, and having no problem regarding the occurrence of dust, even if it is used over a long period of time or under severe environments. SOLUTION : The magnetic encoder 10 is provided with a multi-pole magnet 14 where magnetic poles are alternately formed in the circumferential direction. The multi-pole magnet 14 is a sintered body, acquired by sintering mixed powder of rare-earth magnetic powder and nonmagnetic metal powder to be a binder. The standard electrode potential of the nonmagnetic metal powder is set smaller than that of the rare-earth magnetic powder. COPYRIGHT : (C)2006, JPO&NCIPI