Tool holder

There is provided a tool holder which greatly reduces frictional resistance between a locknut and a tapered collet, and substantially eliminates twisting of the tapered collet during tightening of the locknut. The tool holder comprises a locknut (13) which pushes a tapered collet (12) into a tapered...

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Bibliographic Details
Main Authors NAKAI, EISAKU, TAGUCHI, MASAHIRO, YAMAMOTO, YUSAKU
Format Patent
LanguageEnglish
French
German
Published 25.08.2004
Edition7
Subjects
BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
TURNING
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Summary:There is provided a tool holder which greatly reduces frictional resistance between a locknut and a tapered collet, and substantially eliminates twisting of the tapered collet during tightening of the locknut. The tool holder comprises a locknut (13) which pushes a tapered collet (12) into a tapered hole (115) of a collet chuck body (11) to chuck a cutting tool (15), and between a reference end (123) of the tapered collet (12) and a collet supporting portion (131) opposed thereto, there is interposed is a bearing washer (14) to reduce frictional resistance between both contact surfaces. To both surfaces of this bearing washer (14), namely, to the respective surfaces which come into contact with the reference end (123) and collet supporting portion (131), surface treatment by any of ion nitriding, DLC (Diamond-Like Carbon) coating, and TiN coating is applied.
Bibliography:Application Number: EP20030255897