A Mathematical Modeling to Predict the Cutting Forces in Microdrilling

Table 2

Basic parameters of microdrill.

Geometric feature	Value
Diameter (mm)	0.5
Flute length (mm)	5.0
Helix angle (°)	25
Web thickness (mm)	0.15
Web taper (mm/mm)	0.03
Point angle (°)	130
Primary face angle (°)	12
Chisel edge angle (°)	42.8
Major cutting edge radius (𝜇m)	2
Second cutting edge radius (𝜇m)	3