公开(公告)号：US20070237590A1

公开(公告)日：2007-10-11

申请号：US11375015

申请日：2006-03-15

申请人： Mariam Al-Hussain

发明人： Mariam Al-Hussain

IPC分类号： B23B51/08

CPC分类号： B23B51/08 ,  B23B2251/02 ,  B23C5/10 ,  B23C5/12 ,  B23C2210/326 ,  B23C2222/84 ,  B23C2265/08 ,  B23D71/005 ,  C22C38/22 ,  C22C38/34 ,  Y10T407/1815 ,  Y10T408/34 ,  Y10T408/375 ,  Y10T408/62

摘要： A one or two-piece rotary drill includes a steel shank adapted to fit into a chuck of an electric drill, a drill bit and a frusto conical or frusto spherical file between the shank and the drill bit and all of which are disposed on a common longitudinal axis. The frusto conical or frusto spherical file includes a plurality of crowned teeth about its periphery and wherein each of the teeth have a front cutting side and a back side which includes a plurality of sharp serrations thereon. The composition of the steel tool includes carbon, silicon, molybdenum and chrome. A rotary tool set including a plurality of drill bits and file portions having a plurality of shapes is also disclosed.

摘要翻译： 一个或两个单件旋转钻头包括适于装配到电钻的卡盘中的钢柄，钻头和柄和钻头之间的截头圆锥形或截头圆锥形文件夹，并且它们都设置在共同的 纵轴。 截头圆锥或截头圆球形文件包括围绕其周边的多个加冠齿，并且其中每个齿具有前切割侧和后侧，其上包括多个尖锐锯齿。 钢工具的组成包括碳，硅，钼和铬。 还公开了一种包括多个钻头和具有多个形状的文件部分的旋转工具组。