HRC56° 4Flute end mill cutting parameter recommendation table

Material to be processed	Carbon steel/alloy steel/cast iron < 20-30HRC		Pre-hardened steel/quenched and tempered steel < 35-48HRC		Stainless steel/tool steel < 25-35HRC
diameter	Rotating speed(rev/min)	Feed rate(mm/min)	Rotating speed(rev/min)	Feed rate(mm/min)	Rotating speed(rev/min)	Feed rate(mm/min)
Depth of cut	Side milling ap<1.5D ae<0.1D Slot milling ap<0.3Dae<1.0D	Side milling ap<1.5D ae<0.1D Slot milling ap<0.3Dae<1.0D	Side milling ap<1.5D ae<0.1D Slot milling ap<0.3Dae<1.0D	Side milling ap<1.5D ae<0.1D Slot milling ap<0.3Dae<1.0D	Side milling ap<1.5D ae<0.1D Slot milling ap<0.3Dae<1.0D	Side milling ap<1.5D ae<0.1D Slot milling ap<0.3Dae<1.0D
3	14000	680	10600	470	7500	110
4	10800	700	8000	480	5500	115
6	7000	750	5300	515	3700	120
8	5200	750	4000	510	2800	120
10	4200	730	3200	505	2200	120
12	3500	730	2650	505	1850	120
16	2600	680	2300	470	1400	115
20	2100	670	1600	460	1100	95

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