| 摘要 |
PCT No. PCT/HU88/00045 Sec. 371 Date Jan. 3, 1990 Sec. 102(e) Date Jan. 3, 1990 PCT Filed Jun. 29, 1988 PCT Pub. No. WO89/00097 PCT Pub. Date Jan. 12, 1989.The subject of the invention is wood industrial drilling cutting tool for preparing holes mainly in wood and in the like sort, which holes can be used as blind holes for fastening together wooden constructions, furniture, toys etc. and which has one or more swarf-leading surface which is situated behind one or more main cutting edge which is continuously rising and reach the backside of the drilling body. The essence of the invention is that the swarf-leading surface is concave-courved seeing from the direction of bore rod, further, as a continuation of the swarf-leading surfaces a swarf-lifting spiral is formed on the bore rod. |
