Machining Recommendations

P Material		R-100			R-200				M Material		R-300 & R-500
	Brinnell Hardness	.004″IPR	.016″IPR	.032″IPR	.004″IPR	.016″IPR	.032″IPR				.004″IPR	.008″IPR	.012″IPR
		Surface Feet Per Minute			Surface Feet Per Minute						Surface Feet Per Minute
Carbon Steel	125	1700	1200	900	1600	1100	800		Stainless Steel		900	750	585
	150	1600	1100	850	1450	1000	700
	170	1500	1100	800	1300	900	650
Low Alloy Steel	180	1700	1170	800	1500	1000	715		S Material	Brinnell Hardness	R-300 & R-500
	210	1500	1000	715	1300	900	620				.004″IPR	.008″IPR	.012″IPR
	275	950	850	500	900	620	500		Heat Resistant & High Temp Alloy		Surface Feet Per Minute
	350	750	520	400	700	500	400		Iron Based	200	250	200	180
										280	180	160	150
High Alloy Steel	200	1250	850	600	975	700	500		Ni or Co Based	250	150	130	100
	325	600	400	300	450	325	250			350	110	100	80
Cast Steel	180	900	700	525	780	600	400
	200	800	600	450	700	450	325		K Material	Brinnell Hardness	R-400 & R-100
	225	650	600	325	650	425	300				.004″IPR	.012″IPR	.024″IPR
									Irons		Surface Feet Per Minute
									Malleable Cast Iron	130	1200	1000	800
										230	900	700	500
									Cast Iron	180	1700	1100	800
										260	800	700	500
									Graphite Cast Iron	160	1100	800	600
										250	800	600	450
									Romay Silicon Nitride can be run on all irons at significantly increased speeds

R = Roughing F = Finishing SR = Semi-Roughing SF = Semi-Finishing

Turning and Boring:
Material	Operation	Recommended Grade	Speed(SFM)	Feed(IPR)	DOC (max)
Low-Carbon Steels <Rc56	R, SR	CC-10, CC-20 (thicker inserts)	300 – 2,300	.008 – .020	.060
	F, SF	CC-10, CC-20	600 – 4,000	.003 – .030	.020
Alloy Steels <Rc56	R, SR	CC-10, CC-20 (thicker inserts)	200-2,200	.008-.020	.060
	F, SF	CC-10, CC-20	600-4,000	.003-.030	.020
Hardened Steels; Chilled Cast Iron >Rc56	F, SF	CC-30	200-700	.003-.010	.020
	F, SF	CC-30-SC	200-700	.003-.010	.040
Cast Iron	R, SR	CC-5XX	500-5,000	.010-.025	.250
	F, SF	CC-20, CC-5XX	800-5,000	.003-.025	.050
Ductile & Nodular Iron	R, SR	CC-5XX	500-2,000+	.010-.025	.150
	F, SF	CC-20, CC-5XX	500-2,500	.003-.025	.040
Ni-based alloys; Non-ferrous metals	R, SR	CC-5477	500-850	.008-.016	.150
	F, SF	CC-5477, CC-20	500-1,500	.004-.008	.040
Milling:
Material	Operation	Recommended Grade	Speed(SFM)	Feed(IPR)
Cast Iron	R, SR	CC-5XX	300-4,000	.004-.008
	F, SF	CC-20, CC-5XX	500-5,000	.002-.004
Ductile & Nodular Iron	R, SR	CC-5XX	300-2,500	.002-.006
	F, SF	CC-5XX	650-5,000	.002-.004

General recommended starting conditions:

In irons: 40% faster than the coated carbide on the first corner. Keep increasing the speed by 25% per corner after that.

In steels: 25% faster than the coated carbide on the first corner. Keep increasing the speed by 20% per corner after that.