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美国德莱塞尔(DRESSER)矿山服务部设备部最近提出了一份关于11″×72″×96″(28cm×1830m×244cm)吊打扩孔钻头的综合报告,报告称:该钻头采用了同一形式的牙轮切削具、整体扩孔的设计,刀具座架为楔入式鞍座装置,更换迅速,拉杆是液压传动的,并可拆卸,同时也作了其它一些改进,性能优良。这个钻头由直径为72″的基本钻头和一个直径为11″的拉杆组成,基本钻头装有10个9号尺寸的切削具。扩孔部分的直径为96″,是由每组两个切削具,共6组组成,用螺栓固定在基本组合体上,超出了凸缘,形成了96″的直径,这样就构成了一个牙形
The DRESSER Mine Services Division recently came up with a comprehensive report on a 11 “x 72” x 96 “(28cm x 1830m x 244cm) chamfering reamer, reporting that the drills use the same The form of the cone cutting tools, the overall reaming design, the cutter holder for the wedge-type saddle device, rapid replacement, the rod is hydraulically driven and removable, but also made some other improvements, excellent performance. The drill Consisting of a basic 72 ”diameter drill and a 11“ diameter drawbar, the basic drill is equipped with 10 size 9 cutting tools. The diameter of the reaming section is 96 ”and consists of two cutting tools per group 6 groups, bolted to the basic assembly, beyond the flange, forming a 96 "diameter, thus forming a tooth shape