Figure 3. Roundness vs. No. of holes close to drill exit

From

Effects of Vegetable Oil Based Cutting Fluid in Machining Kevlar Composite Material

Md. Shoriat Ullah, Nikhil Ranjan Dhar

American Journal of Mechanical Engineering. 2018, 6(2), 54-60 doi:10.12691/ajme-6-2-3