Table 1.

Cutting conditions for each machined surface.

	Standard	Fine	Coarse	Fast
Spindle speed (min−1)	4	4	4	4
Feed rate (Inches per min)	150	200	200	200
Max tool depth (mm)	1.2	4	1.2	0.6
Speed rate (second/pass)	9.6	9.2	7	9
No. of passes	270	541	134	179
Time taken (min)	43.2	83	15.6	26.9