发明名称 BOHRER ZUM ERZEUGEN VON LOECHERN IN WERKSTUECKEN.
摘要 The invention relates to a drill for generating of holes in a work piece, preferably in a composite material. The drill comprises a cylindrical shank portion, two cutting portions projecting in the axial and radial direction of the drill and two chip gullets. The cutting portions are arranged symmetrically about the center axis of the drill and each comprising a cutting tip, a minor cutting edge and a free-cutting edge. The cutting portions are shaped such that they require a small feed force in order to drill in the work piece.
申请公布号 DE3673542(D1) 申请公布日期 1990.09.27
申请号 DE19863673542 申请日期 1986.02.26
申请人 SANTRADE LTD., LUZERN, CH 发明人 ISAKSSON, BERTIL, S-811 33 SANDVIKEN, SE;SVAHN, KENNETH, S-811 40 SANDVIKEN, SE
分类号 B23B51/00;(IPC1-7):B23B51/00 主分类号 B23B51/00
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