Machinability Study of Hybrid Nanoclay-Glass Fibre Reinforced Polyester Composites

Table 5

Delamination factor for GRP and CGRP.

Tool	Speed (RPM)	Feed (mm/rev)	Delamination factor 𝐹𝑑 = 𝐷max/D
Carbide twist drill	600	0.045	1.096
	600	0.1	1.036
	852	0.045	1.015
	852	0.1	1.01
	1260	0.045	1.166
	1260	0.1	1.111
HSS twist drill	600	0.045	1.038
	600	0.1	1.111
	852	0.045	0.995
	852	0.1	1
	1260	0.045	1.063
	1260	0.1	1.176
HSS end mill	600	0.045	1.128
	600	0.1	1.118
	852	0.045	1.123
	852	0.1	1.043
	1260	0.045	1.05
	1260	0.1	1.058

Where 𝐷_max: Maximum diameter of the drilled hole in CGRP samples.
D: Diameter of the drill.