The invention relates to the field of spiral lip surface
drill bits, and discloses a spiral lip surface
drill bit which comprises a
drill body, a spiral matrix and a
cutting guiding body, the spiral matrix is arranged at the top of the drill body, a spiral inner lip is arranged on the outer side of the spiral matrix in a surrounding mode, and the
cutting guiding body is arranged on the inner side of the spiral inner lip. A spiral inner lip is arranged on the outer side of the spiral matrix, a spiral outer lip is arranged on the outer side, away from the spiral inner lip, of the outer portion of the spiral matrix, an inner lip groove is formed in the spiral outer lip, an inner groove is formed in the inner side of the top of the spiral matrix, a
machining drill bit is arranged on the top of the spiral matrix, and a
cutting arm is arranged on the outer side of the top of the spiral matrix. According to the design, in the drilling process,
cutting force is more uniform, cuttings are discharged more smoothly, the flowing path of the cuttings is effectively optimized through the design of the spiral outer lip and the inner lip groove, friction between the cuttings and the
drill bit is reduced, and therefore the drilling efficiency and precision are remarkably improved.