Importance

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Abstract

An mounting arrangement of a tool holder in a machine tool comprises a main shaft and the tool holder each having an extending end face formed by extending a given reference end face of the main shaft and a given collar end face of the tool holder, toward one another, respectively, both of which end faces are normally separated with a prescribed clearance, with required extensions so as to come into contact with one another when a tapered shank of the tool holder is fitted into a flared hole of the main shaft, so that the tool holder can be mounted in the main shaft securely owing to a high degree of integration, without the occurrence of friction due to the phenomenon of a fretting corrosion or the like in the contact surfaces between the flared hole and the tapered shank. Such a high degree of integration of the main shaft and the tool holder enables a deep cutting to be readily performed in relation to a workpiece. In addition, the arrangement can be used compatibly with a tool holder of a normal product or a main shaft of a normal product.

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First Claim