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USER GUIDE

Material Groups Recommended Machining Conditions Feed (IPR) vs. Drill Diameter (inch)

Tensile Strength Hardness HB Material Group No. Cutting D=.268-.429 D=.433-.508 D=.512-.587 D=.591-.655 D=.669-.823 D=.827-1.020 INDEXABLE DRILLS

Speed
ISO Material Condition [ksi] Vc sfm
<0.25% C Annealed 61 125 1 160-430
Non-alloy ≥0.25% C Annealed 94 190 2 330-390
steel and Quenched and
cast steel, <0.55% C tempered 123 250 3 300-360 .005-.008 .006-.010 .008-.012 .010-.014 .010-.018 .010-.018
free cutting Annealed 109 220 4 300-390
steel ≥0.55% C Quenched and
tempered 145 300 5 230-300
Annealed 87 200 6 160-360
P Low alloy and cast steel 135 275 7 230-360
(less than 5% of Quenched and .005-.008 .006-.010 .008-.012 .010-.014 .012-.016 .012-.018
alloying elements) tempered 145 300 8 200-300
174 350 9 130-230
Annealed 99 200 10 160-260
High alloyed steel, cast .005-.008 .005-.009 .006-.010 .008-.011 .010-.013 .010-.014
steel and tool steel Quenched and 160 325 11 130-230
tempered
Stainless steel Ferritic/martensitic 99 200 12 70-160 .003-.006 .005-.009 .005-.006 .006-.008 .006-.009 .006-.011
and cast steel Martensitic 119 240 13
Stainless steel
M Austenitic, duplex 87 180 14 70-160 .003-.006 .005-.009 .005-.006 .006-.008 .006-.009 .006-.011
and cast steel
Ferritic / pearlitic 180 15 300-460
Gray cast iron (GG)
Pearlitic / martensitic 260 16 260-430
Ferritic 160 17 330-590 .008-.012 .010-.014 .012-.016 .014-.018 .016-.020 .016-.024
K Nodular cast iron (GGG)
Pearlitic 250 18 300-520
Ferritic 130 19
Malleable cast iron
Pearlitic 230 20
Aluminum- Not hardenable 60 21 300-520
wrought alloys Hardenable 100 22 260-390 .008-.014 .010-.016 .012-.018 .014-.018 .016-.024 .016-.026
Not hardenable 75 23 300-520
Aluminum- ≤12% Si Hardenable 90 24
cast alloys
>12% Si High temperature 130 25
N >1% Pb Free cutting 110 26
Copper
alloys Brass 90 27
Electrolytic copper 100 28
Duroplastics, 29
Non metallic fiber plastics
Hard rubber 30
Annealed 200 31 100-160
Fe based .002-.004 .003-.005 .004-.006 .005-.007 .005-.008 .005-.009
High Hardened 280 32 70-130
temperature Annealed 250 33 70-160 .002-.005 .004-.006 .005-.007 .006-.008 .006-.009 .006-.010
alloys Ni or Co Hardened 350 34
S based
Cast 320 35
Pure 58 190 36
Titanium alloys Alpha+Beta 152 310 37
alloys, hardened
Hardened 55 HRC 38 70-160 .002-.005 .004-.006 .005-.007 .006-.008 .006-.009 .006-.010
Hardened steel
H Hardened 60 HRC 39
Chilled cast iron Cast 400 40 70-160 .002-.005 .004-.006 .005-.007 .006-.008 .006-.009 .006-.010
Cast iron Hardened 55 HRC 41
• When using external coolant supply only, reduce cutting speed by 10% • When using more than 5XD drill ratio, reduce cutting parameters by 10%. As a starting value, the
middle of the recommended machining range should be used. Then, according to the wear results, conditions can be changed to optimize performance. The data refers to
IC908. For IC1008, cutting speed should be increased by 15%.
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