To provide a sliding member having an effect of reducing friction by controlling the shape of the bottom face of a finely recessed portion to be formed in a sliding member.
The pair of sliding members mutually slide with viscose fluid existing therebetween. The finely recessed portion 12 is formed in a sliding face 11 of at least one sliding member 10 out of the pair of sliding members, and the recessed portion 12 consists of the bottom face 12b and a steep sloping face 12a ranging from the sliding face 11 to the bottom face 12b. S/L satisfies conditions of 0-0.2 or smaller, where L is the opening width of the recessed portion 12 on the sliding face 11 in the sliding direction of the sliding member 10 or in the flowing direction of the viscose fluid, and S is a space between a position of starting the sloping face 12a from the sliding face 11 and a position of starting the bottom face 12b from the sloping face 12a. 1/R satisfies conditions of 0 or greater, where R is the curvature radius of the bottom face 12b of the recessed portion 12 when curved.
NANBU TOSHIKAZU
YASUDA YOSHITERU
Yasuo Nara
Katsuyuki Utani
Ken Fujita
Masanori
Toshihiro Hasegawa
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