Cutting tool holder and cutting tool
AssigneeNgk Spark Plug Co., Ltd.
InventorShusuke KITAGAWA
Life of this patent
Estimating the term…
Abstract
In a cutting tool holder having a shaft hole into which a boring bar can be inserted and a screw hole provided at one side of an outer peripheral surface so as to penetrate toward the shaft hole, an ejection port from which a coolant is ejected toward a cutting edge of the boring bar when the boring bar is inserted and fixed by screwing in a setscrew is opened in a front end surface of the holder, and the single holder is allowed to handle a difference in the position of the ejection port between “knife edge supply” and “back surface supply” of the coolant without causing a problem regarding fixing of the boring bar. Screw holes 135 for fixing the inserted boring bar 200 by screwing setscrews 130 thereinto are provided at both sides in a radial direction of the shaft hole 110.
Claims8
A cutting tool holder comprising:
- a shaft hole into which a boring bar having a cutting edge at one side of a front end thereof can be inserted;
- one or a plurality of screw holes for fixing the inserted boring bar by screwing setscrews thereinto, the one or the plurality of screw holes being provided at one side of an outer peripheral surface of the cutting tool holder so as to penetrate toward the shaft hole;
- and
- an ejection port formed such that a coolant can be ejected therefrom toward the front end of the boring bar inserted in the shaft hole and fixed by screwing in the setscrews, the ejection port being opened in a front end surface of the cutting tool holder, wherein
- a screw hole for fixing the inserted boring bar by screwing a setscrew thereinto is provided also at a side opposite to the screw holes in a radial direction of the shaft hole, so as to penetrate from the outer peripheral surface of the cutting tool holder toward the shaft hole.
Dependencies are inferred from the claim text.