| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a bearing of two-point support structure where sintered body is incorporated into a housing, efficiently in a relatively simple manner to give appreciable bearing performance. SOLUTION: This bearing manufacturing method has a positioning step of press-fitting and positioning a raw material or sintered body 1A to form a bearing body 10A in a housing 21 coaxially to unite them both temporarily, and a press-fitting step of press-fitting the housing 21 as it carries the raw material 1A in a forming hole 30 of a die 31 after a core rod 32 of a uniform outside diameter has been inserted in the raw material 1A. The press-fitting step bonds the diametrally external surface of the raw material 1A under compression to the diametrally internal surface of the housing 21, and constricts the housing 21 diametrally through the overall length. The diametral constriction of the housing 21 presses both axial ends of the diametrally internal surface of the raw material 1A against the core rod 32 to form shaft supporting surface 12 with an intermediate recess 13 in between.
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