Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Kyodo Yushi Co., Ltd.

Yoshimi Usui

Kiyoshi Takeuchi

Yoshihisa Doi

Junichi Suto

Toshio Takaku

Munenori Tate

Koichi Kawata

Takashi Ichimura

Masahiko Seki

Toshio Izawa

Kazuto Fukuda

Minoru Sugiyama

Tomio Hanawa

Tsuyoshi Sasaki

Hidetoshi Isogai

Takahiro Ogura

A shaft manufacturing apparatus includes a first drawing die having a cylindrical first cavity defined therein which is open at both ends thereof and a second drawing die having a cylindrical second cavity defined therein which is open at one end thereof. The angle formed between a first tapered part of the first drawing die and the axis of the first cavity is greater than the angle formed between a second tapered part of the second drawing die and the axis of the second cavity.

Method of and apparatus for manufacturing shaft

Grooves as ball rolling grooves are formed in a side peripheral wall of a preparatory formed body that is to be an inner member. A recess opened so as to be continuous to curved bottom sections of the grooves, which face a through-hole, is formed in one end surface of the preparatory formed body. In carburizing, carburizing gas entering into space between the through-hole and a support shaft member flows through the recess after coming into contact with inner teeth, and is then discharged to the outside of the preparatory formed body via the curved bottom sections of the grooves. On the contrary, the carburizing gas having been in contact with the curved bottom sections of the grooves flows through the recess to come to be in contact with the inner teeth and is then discharged through the space.

Member with inner teeth and method of producing the same

A ball for use in a constant-velocity joint, which is adapted to be interposed between an inner race and an outer race for transmitting rotational power therebetween, is produced by nitriding a surface of a ball made of bearing steel or a material equivalent thereto, and processing the nitrided ball for increased resistance to a crushing load. The nitrided ball is processed for increased resistance to a crushing load by tempering the ball at a temperature ranging from 180 to 230&deg; C. The surface hardness of the ball should preferably be adjusted in the range from HRC 60 to 64.

Ball for constant-velocity joint and method of manufacturing such ball

A grease composition for constant velocity joints which consists essentially of: (a) a base oil; (b) a diurea compound represented by the following general formula:

Grease composition for constant velocity joints

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Tochigi-ken, Japan

Yoshimi Usui