DUAL FRILL BIT FOR DRILLING STONE ANCHOR GROOVE AND DRILL APPARATUS FOR DRILLING STONE PLATE ANCHOR GROOVE

摘要

The present invention relates to a double drill bit for stone anchoring grooving and a drill device for drilling grooved anchor grooving. According to one embodiment of the present invention, there is provided a drill bit body having a rotary shaft insertion hole into which a rotary shaft of a drilling device is inserted and having an upper head inserted into an insertion groove around a rotary shaft when the rotary shaft is inserted into the rotary shaft insertion hole; A drill bit body extending from a lower central portion of the drill bit body and having a diameter larger than a diameter of a lower end connection portion formed to be larger than a diameter of the lower end connection portion, drill; And a second drill projecting downward from one edge of the lower edge of the drill bit body and forming a seating groove as a reference surface for inserting the anchor bolt into the anchor groove around the anchor groove on the stone according to the rotation of the rotary shaft A double drill bit for stone anchor grooving is proposed. Further, a drilling apparatus for a stator anchor groove processing is proposed.