RECOMMENDED CALCULATIONS When Using Ball Nose Copy Milling Cutters

I.S.O CODE	MATERIAL	GRADE	SURFACE SPEED m/min	FEED / TOOTH OPERATION (fz mm)
				I	II	III
P	Plain carbon steel - Free cutting steel	T40/T60	200	0.12	0.2	0.25
	Structural alloy steel. - Cast steel	T40/T60	160	0.12	0.18	0.25
	Heat treatable steel, medium strength. - Case hardening steel.	T40/T60	160	0.12	0.18	0.25
	Stainless steel, ferritic martensitic	T40/T60	130	0.12	0.18	0.27
	Heat treatable steel, high strength. - Nitriding steel - Tool steel.	T40/T60	130	0.1	0.16	0.2
M	Stainless steel austenitic	T40	240 (80)	0.1	0.12	0.15
K	Aluminium alloys, long chipping	K10	900	0.2	0.3	0.4
	Copper alloys, long chipping. - Pure metals, soft. - Thermoplastics	K10	250	0.15	0.25	0.3
	Grey cast iron	T60	>200	0.15	0.25	0.35
	Alloyed grey cast iron	T60	>200	0.12	0.2	0.25
	Nodular cast iron	T60	<200	0.15	0.2	0.3
	Malleable cast iron	T60	160	0.12	0.2	0.25
	Magnesium alloys	K10	200	0.12	0.2	0.25
	Titanium alloys, medium strength	K10	80	0.15	0.2	0.25
	Nickel based alloys, medium strength	T60	60	0.2	0.25	0.3
	Aluminium alloys, short chipping	K10	250	0.15	0.2	0.3
	Copper alloys, short chipping	T60	250	0.12	0.2	0.25
	Heat resistant nickel based alloys, high strength	T60	40	0.2	0.25	0.3
	Titanium alloys, high strength	K10	60	0.12	0.2	0.3
	Chilled cast iron	T60	60	0.12	0.15	0.2
	Duroplastics	K10	300	0.15	0.2	0.3

OPERATION	ROUGHING			FINISHING
	I		II	III
ap=	0.5.d¹ 1.d	>0.5.d¹ 0.2.d - 0.5.d¹	0.2.d - 0.5.d¹ 0.2.d - 0.5.d¹	< 0.2.d¹ < 0.2.d¹	0.2.d¹ - 0.5 < 0.2.d¹	> 0.5.d¹ < 0.2.d¹
ae=
Speeds to use for varing depths of cut	1 x rpm		1.1 x rpm	2 x rpm	1.3 x rpm	1 x rpm
If several values are valid please choose the smallest one.

Theoretical surface roughness

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