DRILLS
SPADE DRILL—APPLICATION GUIDELINES
Feed (IPR) .531"-.688" .688"-1.000" 1.000"-1.250" 1.250"-2.000" 2.000"-2.500"
Material Hardness (BHN)
Material
SFM
100-150 150-200 200-250 85-125 125-175 175-225 225-275 125-175 175-225 225-275 275-325* 125-175 175-225 225-275 275-325* 325-375* 225-300* 300-350* 350-400* 100-150 150-250 250-350* 140-220* 220-310* 135-185 185-275 150-200 200-250
200 180 160 170 160 150 140 160 150 140 130 150 140 130 120 110
.010 .010 .010 .009 .009 .008 .008 .009 .008 .008 .007 .008 .008 .007 .006 .006 .007 .007 .006 .010 .009 .008 .007 .006 .008 .007 .006 .006 .013 .013 .012 .011 .009 .007 .006
.013 .013 .013 .012 .012 .010 .010 .012 .010 .010 .009 .010 .010 .010 .009 .009 .009 .009 .008 .012 .010 .009 .008 .007 .009 .008 .008 .008 .016 .016 .016 .014 .012 .009 .007
.016 .016 .016 .015 .015 .014 .014 .015 .014 .014 .012 .014 .014 .014 .012 .012 .010 .010 .009 .014 .012 .010 .010 .080 .011 .010 .010 .010 .022 .022 .020 .018 .016 .012 .009
.020 .020 .020 .020 .020 .018 .018 .020 .018 .018 .016 .017 .017 .017 .015 .015 .014 .014 .012 .018 .016 .014 .012 .010 .014 .012 .012 .012 .030 .030 .024 .022 .018 .014 .011
.025 .025 .025 .025 .025 .022 .022 .025 .022 .022 .020 .020 .020 .020 .018 .018 .018 .018 .016 .022 .020 .017 .015 .012 .016 .014 .015 .015 .035 .035 .028 .026 .022 .017 .014
Free Machining Steel 1118, 1215, 12L14, etc.
Low Carbon Steel 1010, 1020, 1025, 1522, 1144, etc.
Medium Carbon Steel 1030, 1040, 1050, 1527, 1140, 1151, etc.
Alloy Steel 4140, 5140, 8640, etc.
80 60 50
High Strength Alloy 4340, 4330V, 300M, etc.
140 120 100
Structural Steel A36, A285, A516, etc.
30 25 75 60 80 60
High Temp. Alloy Hastelloy B, Inconel 600, etc.
Stainless Steel 310, 316, 330, 17-4 PH, etc.
Tool Steel H-13, H-21, A-4, O-2, S-3, etc.
30
600 300 170 150 130 110
Aluminum
180
120-150 150-200 200-220 220-260* 260-320*
Cast Iron (TiN Coated HSS Tools)
90
*SC grade recommended • Reductions in speed may be required due to excessive tool wear • Always use an ample supply of coolant through the tool
Formulas:
IPM = RPM x IPR
SFM = RPM x Drill ø
RPM = SFM x 3.82
3.82
Drill ø
The speeds and feeds listed above are only a starting point! Contact our engineering department if you require assistance. Please have item number, hole diameter, depth, material grade, BHN hardness and coolant pressure information available when you call. Additional information such as part and machine rigidity, horse power and thrust limits, vertical or horizontal spindle, revolving or stationary tool, flood or through holder coolant are also very helpful to our Application Engineers when you require their best recommendation. The above recommendations are based on adequate coolant flow, machine rigidity, horse power and thrust capability. Wear protective eye glasses and use machine protective shields.
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