Advances in Materials Science and Engineering

Research Article

Study of Complex Helical Drill with a “S” Type Chisel Edge Tip Orient to Carbon Fiber Reinforced Plastics

Figure 13

The photos of holes drilled by each drill. (a) afc = 5°. (b) afc = 10°. (c) afc = 15°.
(a)
(b)
(c)