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

Table 5

The fitting results of axial force and torque.

Fitting variable	Value	Correlation coefficient	Error (%)
	190.331	—	3.2
	0.022	85.1
	0.398	100
	7.693	—	16.3
	0.465	100
	0.261	99.7