
Recommended Starting Speeds (SFM) and Feeds (IPR) — T-15 HSS Blades
MATERIAL SPEEDS (SFM) FEED (IPR)
Coatings Series/Diameters
Y & Z0123456, 7, 8
Hardness TiCN .375 .509 .691 .961 1.381 1.880 2.571 3.001
or to to to to to to to to
Bhn TiN "G" TiAlN CX-H Diamond .508 .690 .960 1.380 1.879 2.570 3.000 4.500
Low Carbon Steel 85 – 125 175 225 NR 240 NR .008 .011 .013 .016 .020 .023 .025 .028
1010, 1020, 1025, 125 – 175 165 210 NR 230 NR .007 .010 .012 .016 .020 .022 .024 .027
1522, etc. 175 – 225 155 200 NR 215 NR .006 .009 .011 .015 .019 .021 .023 .026
225 – 275 145 185 225 NR NR .006 .008 .010 .014 .018 .021 .023 .025
Free Machining Steel 100 – 150 200 260 NR NR NR .008 .011 .014 .017 .021 .025 .026 .028
1118, 1215, 12L14, etc. 150 – 200 180 240 NR NR NR .007 .010 .013 .016 .020 .023 .024 .026
200 – 250 160 220 250 230 NR .006 .010 .013 .016 .020 .023 .024 .026
Medium Carbon Steel 125 – 175 165 210 NR NR NR .007 .009 .012 .016 .020 .023 .025 .027
1030, 1040, 1050, 1527, 175 – 225 155 190 NR NR NR .006 .008 .011 .015 .019 .022 .023 .025
1140, 1144, 1151, etc. 225 – 275 145 170 215 NR NR .006 .008 .010 .014 .018 .021 .022 .024
275 – 325 135 160 200 NR NR .005 .007 .009 .012 .016 .019 .021 .023
Alloy Steel 125 – 175 150 195 NR 200 NR .007 .009 .011 .015 .018 .021 .023 .025
4140, 5140, 8640, etc. 175 – 225 140 180 NR 185 NR .007 .009 .010 .014 .017 .019 .021 .023
225 – 275 130 165 185 NR NR .006 .008 .010 .013 .016 .019 .020 .021
275 – 325 120 150 170 NR NR .005 .007 .009 .012 .015 .017 .018 .020
325 – 375 110 140 155 NR NR .004 .006 .009 .012 .015 .017 .018 .020
High Strength Alloy 225 – 300 90 105 130 NR NR .006 .008 .010 .012 .015 .017 .019 .021
4340, 4330V, etc. 300 – 350 70 85 100 NR NR .005 .007 .009 .011 .014 .016 .018 .021
350 – 400 NR NR 80 NR NR .004 .006 .008 .010 .012 .014 .016 .019
Structural Steel 100 – 150 150 180 NR NR NR .007 .010 .012 .015 .018 .021 .023 .026
A36, A285, A516, etc. 150 – 250 125 160 190 NR NR .006 .009 .011 .013 .016 .019 .021 .024
250 – 350 100 135 160 NR NR .005 .008 .009 .011 .014 .017 .019 .022
Tool Steel 150 – 200 85 105 NR NR NR .007 .008 .009 .011 .013 .015 .016 .018
H-13, H-21, 200 – 250 75 90 110 NR NR .006 .007 .008 .011 .013 .015 .016 .018
A-4, O-2, S-3, etc 250 – 350 45 NR 70 NR NR .005 .006 .007 .009 .011 .013 .014 .016
350 – 400 NR NR 50 NR NR .004 .005 .006 .007 .009 .012 .013 .014
Stainless Steel 135 – 185 80 100 120 100 NR .007 .008 .010 .012 .015 .017 .019 .021
416, 420, 17-4PH, etc. 185 – 275 NR 85 105 95 NR .006 .007 .009 .011 .013 .015 .017 .019
275 – 350 NR 75 90 80 NR .005 .006 .007 .009 .011 .013 .015 .017
Cast Iron 120 – 150 180 225 270 250 225 .008 .013 .017 .020 .024 .027 .029 .031
Gray, Ductile, 150 – 200 160 200 240 220 200 .007 .011 .014 .018 .022 .025 .027 .029
Nodular 200 – 220 140 175 210 190 175 .006 .009 .012 .016 .018 .021 .023 .025
220 – 260 120 150 180 165 150 .005 .007 .010 .012 .014 .017 .019 .021
260 – 320 100 125 150 135 125 .004 .006 .007 .009 .012 .014 .016 .018
Aluminum - Wrought — NR 700 NR 750 750 .007 .012 .015 .019 .021 .024 .025 .026
Cast — NR 400 NR 500 500 .008 .013 .016 .020 .022 .025 .026 .027
Copper Alloys — NR 450 NR 550 600 .007 .012 .015 .019 .021 .024 .025 .026
High Temp. Alloy 140 – 210 NR 35 45 NR NR .006 .007 .008 .010 .013 .015 .016 .017
Hastelloy B, 210 – 280 NR 30 40 NR NR .005 .006 .007 .008 .010 .012 .013 .014
Inconel 600, etc. 280 – 340 NR 25 35 NR NR .004 .006 .007 .008 .009 .011 .012 .013
Titanium Alloys — NR 40 50 45 NR .005 .007 .008 .010 .012 .015 .016 .017
NR = Not Recommended
Formulas: IPM = RPM x IPR ★ SFM = .262 x RPM x Diameter ★ RPM = SFM x 3.82 ÷ Diameter
Technical Data: T-15 HSS Blades
Premium Coatings:
• TiN (Titanium Nitride) gives longer tool life and added
lubricity, while allowing more aggressive machining of steels.
• TiCN (Titanium Carbonitride) is a general purpose coating well
suited to machining of mild steel, ductile cast iron and
nonferrous materials such as aluminum and copper alloys. TiCN
is superior in preventing excessive BUE (built-up edge).
• “G” is comprised of more than 20 layers of TiCN and TiAlN
with an overcoat of TiN optimized for drilling mild steel and
ductile cast iron.
• TiAlN (Titanium Aluminum Nitride) a multilayer, mixed phase
coating designed for high-speed machining in alloy steels, high
temp alloys, gray cast iron and titanium. Performance advan-
tages require TiALN coated tools to be operated at relatively high
speeds, typically 50% greater than other PVD coatings such as
TiN.
• CX-H is a proprietary coating designed for optimal drilling of
abrasive, short chipping nonferrous alloys (e.g. red brass, Al-Si
alloys).
• Diamond coating is designed for abrasive nonferrous alloys.
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