Sankyo Seiki Mfg. Co., Ltd

Masashi Nakata

Yukihiko Takita

Eiji Imai

Yoshihito Komatsu

Kazuhiko Nakata

A magnetic head having a head unit for contacting a magnetic medium comprises at least a pair of magnetic cores which are arranged in the head unit which face each other on sides of a magnetic gap for recording and/or reproducing signals. A spacer is included for maintaining a space between one of the magnetic cores and another member, which may be the other magnetic core or a shield member. The spacer includes a usable life detection device for providing an indication of wear on the head unit which is interrupted when the head unit is worn down to predetermined depth. A device for electrically sensing an interruption of the indication is provided so that a usable lifetime of the head unit can be determined.

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Nagano, Japan

Masashi Nakata