Fuji Seiko Limited

Hiroyasu Sakai

Toshihiro Yasuda

Mitsuhiko Tomioka

Motoshi Nakamura

Tetsuro Nakanose

Tetsuhiro Kawazoe

A reamer including; a generally cylindrical cutter body having (a) a flute formed in an outer circumferential surface of the cutter body and extending from an axially distal end of the cutter body toward an axially proximal end of the cutter body, (b) a cutting blade portion positioned at a longitudinally distal end of a downstream one of widthwise opposite edges of the flute as viewed in a rotating direction of the reamer, and (c) a guide portion having a guide surface which is circumferentially adjacent to the flute and which circumferentially extends over at least 240&deg; about an axis of the cutter body. The guide surface is a part of the outer circumferential surface of the cutter body.

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Toyota, Japan

Hiroyasu Sakai