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Allied T-A Recommended Speeds and Feeds for HSS Inserts (SC = super cobalt, PC = premium cobalt)
						FEED (IPR)
Material	Material Hardness (BHN)	Tool Steel Grade	TiN SFM	TiAlN SFM	TiCN SFM	3/8 to 1/2	33/64 to 11/16	45/64 to 15/16	31/32 to 1-3/8	1-13/32 to 1-7/8	1-29/32 to 2-9/16	2-19/32 to 4-1/2
Free Machining Steel 1118,1215 12L14,etc.	100-150 150-200 200-250	HSS HSS HSS	200 180 160	280 260 240	260 235 210	.007 .007 .006	.010 .010 .010	.013 .013 .013	.016 .016 .016	.020 .020 .020	.023 .023 .023	.028 .028 .028
Low Carbon Steel 1010,1020 1025,1522 1144,etc.	085-125 125-175 175-225 225-275	HSS HSS HSS HSS	170 160 150 140	250 240 225 210	220 210 195 180	.006 .006 .005 .005	.009 .009 .008 .008	.012 .012 .010 .010	.015 .015 .014 .014	.019 .019 .018 .018	.023 .023 .021 .021	.027 .027 .024 .024
Medium Carbon Steel 1030,1040 1050,1527 1140,1151 etc.	125-175 175-225 225-275 275-325	HSS HSS HSS SC,PC	160 150 140 130	240 225 210 195	210 195 180 170	.006 .005 .005 .004	.009 .008 .008 .007	.012 .010 .010 .009	.015 .014 .014 .012	.019 .018 .018 .016	.023 .021 .021 .019	.027 .024 .024 .022
Alloy Steel 4140,5140 8640,etc.	125-175 175-225 225-275 275-325 325-375	HSS HSS HSS SC,PC SC,PC	150 140 130 120 110	210 195 180 170 155	195 180 170 155 145	.006 .005 .005 .004 .003	.008 .008 .007 .006 .006	.010 .010 .010 .009 .009	.014 .014 .014 .012 .012	.017 .017 .017 .015 .015	.019 .019 .019 .017 .017	.022 .022 .022 .020 .020
High Strength Alloy 4340,4330V 300M,etc.	225-300 300-350 350-400	SC,PC SC,PC PC	80 60 50	110 85 70	100 80 65	.005 .004 .003	.007 .007 .006	.009 .009 .008	.010 .010 .009	.014 .014 .012	.017 .017 .015	020 .020 .018
Structural Steel A36,A285 A516,etc.	100-150 150-250 250-350	HSS HSS SC,PC	140 120 100	200 170 140	180 155 130	.006 .005 .004	.010 .009 .008	.012 .010 .009	.014 .012 .010	.018 .016 .014	.021 .019 .017	.026 .024 .020
High Temp Alloy Hastelloy B Inconel 600, etc.	140-220 220-310	SC,PC PC	30 25	40 35	35 30	.003 .003	.007 .006	.008 .007	.010 .008	.012 .010	.015 .012	--- ---
Stainless Steel 303,416,420 17-4PH,etc.	135-185 185-275	HSS HSS	75 60	105 90	95 80	.006 .005	.008 .007	.009 .008	.011 .010	.014 .012	.016 .014	.020 .018
Tool Steel H-13,H-21,A-4 0-2,S-3,etc.	150-200 200-250	SC SC,PC	80 60	110 90	105 85	.004 .004	.006 .006	.008 .008	.010 .010	.012 .012	.015 .015	.017 .017
Aluminum	30 185	HSS HSS	600 300	850 450	750 400	.008 .008	.013 .013	.016 .016	.020 .018	.022 .022	.025 .025	.025 .025
Cast Iron Gray,Ductile Nodular	120-150 150-200 200-220 220-260 260-320	HSS HSS HSS SC,PC SC,PC	170 150 130 110 90	250 225 195 165 135	220 195 170 145 120	.007 .006 .006 .005 .004	.012 .011 .009 .007 .006	.016 .014 .012 .009 .007	.020 .018 .016 .012 .009	.024 .022 .018 .014 .012	.027 .025 .021 .017 .014	.030 .028 .024 .020 .016
	Holder Legnth
	Stub		Short		Intermediate		Standard		Extended	Long	XL	3XL
Speed	See Above Chart								.90	.85	.80	.75
Feed	See Above Chart									.95	.90	.90