BROACH

PROBLEM TO BE SOLVED: To provide a broach capable of extending the tool service life by reducing a processing load. SOLUTION: The broach is equipped with a plurality of spline cutting teeth 21 provided in the axial direction and performing cutting with respect to a workpiece W outwardly in the radial direction; and with a plurality of plastic finishing teeth 31 provided in the axial direction in the rear of the spline teeth 21, performing plastic forming with respect to a processed part Wb of the workpiece W cut by the spline cutting teeth 21 toward the circumferential direction and finishing the processed part Wb as a tooth groove Wd. COPYRIGHT: (C)2008,JPO&INPIT