Table 1.

The data described in this paper were obtained using three pigs. The drill parameters used in each experiment are listed in the table.

	Body weight (kg)	${\dot{F}}_{\mathit{threshold}}$ (N/s)	${\dot{x}}_{\mathit{threshold}}$(mm/s)	Drill speed (rpm)
Experiment 1	41	− 10	2	10,000
Experiment 2	36	− 7	2	30,000
Experiment 3	34	− 7	2	15,000