In a shank portion of an end mill which is chucked by a tool holder, flat surfaces are formed at a plurality of circumferential positions in the outer periphery of the shank portion so that the flat surfaces abut on side lock bolts attached to a body of the tool holder.
申请公布号
EP2756900(B1)
申请公布日期
2015.04.29
申请号
EP20140164452
申请日期
2012.09.27
申请人
NIKKEN KOSAKUSHO WORKS, LTD.
发明人
NAKAI, EISAKU;MAEMURA, SUGURU;MIKADO, SUSUMU;ECKERSALL, STEVE
