Tool holder for a spindle device of a machine tool

摘要

A tool holder for a spindle device of a machine tool, stably ejecting spray coolant from the tip of a tool (19) in a tool holder (18) and suppressing a waste of the spray coolant, wherein the tool holder (18) is fixable to the tip part of a spindle (2) mechanically detachably through clamp means (KR); an extension passage (104) is formed in the state that an in-spindle spray coolant passage (102) formed in the center part of the spindle (2) is formed to communicate with the in-holder spray coolant passage (103) through the extension passage (104).