Table 4.

Cuttability parameters obtained from Cerchar measurements.

Rock	ASFCerchar [N]	ASD [mm]	Vm [mm3]	MoSFCerchar [N/mm]	SECerchar [mJ/mm3]
Granite	47.41	0.11	0.15	431.00	3162.67
Dolomite	56.06	0.15	1.32	374.40	424.68
Limestone	49.40	0.12	0.59	411.67	837.15
Greywacke	49.06	0.20	0.92	245.30	533.46
Sandstone	72.64	0.34	4.33	213.65	167.99
Gneiss *)	40.06	0.12	0.26	333.83	1540.58

*): Scratching direction is perpendicular to the foliated surface of the metamorphic rocks.