Patent ID: 7025544

Claim:
A machine tool, comprising: a spindle ( 14 ) displaceable in a vertical direction (f 1 ) and/or in a lateral direction, in addition to in a longitudinal direction (f 2 ); a cutter ( 17 ) forward protrudently fixed to a front end of said spindle ( 14 ), the tip of said cutter ( 17 ) spouting atomized lubricant (h) forward; and a lubricant jetting state detector ( 20 ) for detecting a jetting state of the atomized lubricant (h) spouted from the tip of said cutter ( 17 ); wherein the lubricant jetting state detector ( 20 ) is provided to a position within displacement (a) of the cutter ( 17 ), the lubricant jetting state detector comprises a cylindrical member ( 21 ) having a straight inner hole ( 21 a ), said lubricant jetting state detector ( 20 ) injects detection light (c) to a specified position (b) inside the inner hole ( 21 a ) and detects the degree of transmission or reflection of the detection light (c).