Design and use of small diameter drill bits

1. Structural design of small-diameter drill bit We usually refer to the small-diameter drill bit, which generally refers to a drill bit of φ1 to φ3 mm. The structural shape of the small diameter drill bit is the same as that of the standard large diameter drill bit, both of which are diameter d_0. Composition of helix angle β, front angle 2φ, etc. However, the form and structural parameters of the handle are different. Due to the small diameter of the small diameter drill, its strength is relatively low and the rigidity is poor. Appropriate measures should be taken during design.