A drill bit
    2.
    发明公开
    A drill bit 失效
    一个钻头

    公开(公告)号:EP0836919A1

    公开(公告)日:1998-04-22

    申请号:EP97307206.9

    申请日:1997-09-17

    IPC分类号: B28D1/00 E21B10/58 B23B51/00

    摘要: A masonry drill bit having an active diameter of D, comprising a shaft and a tip 1 for engaging a workpiece, wherein the tip 1 is formed with a plurality of stepped portions shaped to cut a workpiece as the drill bit rotates. By virtue of the drill bit tip 5 configuration as described and claimed herein, a masonry drill bit 1 having improved performance is provided.

    摘要翻译: 一种有效直径为D的砖石钻头,其包括用于接合工件的轴和尖端1,其中尖端1形成有多个台阶部分,该台阶部分被成形为当钻头旋转时切割工件。 借助于此处描述和要求保护的钻头尖端5构造,提供了具有改进性能的mas工钻头1。