Multi -functional spiral bit

The utility model discloses a multi -functional spiral bit, bore the body, fix a position sharp portion including bit sub, stop device, bolt, the bit sub sets up in the position of right -hand member, is provided with stop device in the left side of bit sub, and stop device's left side is provided with the anger body, and the anger body comprises helicla flute, bit wing and scroll, the helical shape groove is constituteed by two adjacent scrolls to the helicla flute, and diameter that the right side of the anger body is half one be 10 -12mm, and the diameter that the left side of the anger body is half one be 8 -10mm, a location point left side tip that the setting was personally experienced sth. Part of the body at the anger. This kind of multi -functional spiral bit can separate and to use a drill bit to bore the problem in the aperture of different diameters on same straight line simultaneously, has improved the drill bit not high problem of drill chip expulsion efficiency in the course of the work greatly simultaneously, has still solved the problem that the drill bit bored easily.