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Recommended Machining Conditions for SCD-SXC16 & SCD-SXC20 Solid Carbide Drills
Cutting Diameter
Tensile Strength Material Group No. Cutting Feed (IPR)

Speed
Vc
ISO Material Condition [ksi] Hardness HB (SFM) Ø.125"-.197" Ø.200"-.315" Ø.319"-.391" Ø.393"-.625" Ø.630"-.787"
<0.25% C Annealed 61 125 1
≥0.25% C Annealed 94 190 2
Non-alloy Quenched and
steel and cast <0.55% C tempered 123 250 3 SOLID CARBIDE DRILLS
steel, free
cutting steel Annealed 109 220 4
≥0.55% C Quenched and 230-300
tempered 145 300 5 .0039-.007 .0055-.0094 .0063-.01 .007-.0118 .0078-.0137
P Low alloy and cast steel Annealed 87 200 6
(less than 5% of Quenched and 135 275 7
alloying elements) tempered 145 300 8
174 350 9
Annealed 99 200 10
High alloyed steel, cast
steel and tool steel Quenched and 160 325 11 230-280
tempered
Ferritic/martensitic 99 200 12
Stainless steel and cast steel 190-230 .003-.0055 .0039-.007 .0047-.0078 .0055-.0086 .0063-.0094
Martensitic 119 240 13
M Stainless steel and cast steel Austenitic, duplex 87 180 14 180-220 .0023-.0055 .003-.0063 .0039-.007 .0047-.0078 .0055-.0094
Ferritic / pearlitic 180 15
Gray cast iron (GG)
Pearlitic / martensitic 260 16
Ferritic 160 17
K Nodular cast iron (GGG) 260-330 .0055-.0094 .0063-.01 .007-.0118 .0078-.0137 .0098-.0177
Pearlitic 250 18
Ferritic 130 19
Malleable cast iron
Pearlitic 230 20
Annealed 200 31
Fe based 110-150 .0023-.0047 .003-.0063 .0039-.007 .0047-.0078 .0055-.0086
High Hardened 280 32
temperature Annealed 250 33
alloys Ni or Co Hardened 350 34 100-130 .0023-.0047 .003-.0063 .0039-.007 .0047-.0078 .0055-.0086
S based
Cast 320 35
Pure 58 190 36
Titanium alloys Alpha+Beta alloys, 110-150 .0023-.0047 .003-.0063 .0039-.007 .0047-.0078 .0055-.0086
hardened 152 310 37
TIPS & TRICKS for DEEP HOLE DRILLING
Using a G73 peck cycle helps Chip evacuation in deep hole drilling & materials which have poor chip formation
16xD - 50xD must utilize a Pilot hole drill
40xD - 50xD can utilize a 20xD intermediary drill if deemed necessary
TIR & tool alignment with material are the most important factors in deep hole drilling
Use high pressure coolant when deep hole drilling
Slow the feedrate to 50% when breaking through the material
In through holes, the tool exit should not exceed .078”-.118”.
Recommended Drilling Procedure for Deep Hole Drilling

1 Drill a pilot hole 1-2xD deep with a short drill. The pilot drill should be
.0011”-.0019” larger than the long drill and its point angle should 1
also be larger (over 135°).
2 Enter the pre-hole using low feed and rotate at low speed 2
(50-100 RPM) until it engages the material.
3 Activate the coolant system and increase rotation speed to the
recommended cutting parameter, maintain for 2-3 seconds, then 3
continue at recommended drilling feed. No pecking is required.
4 After having reached the required depth, reduce speed to 4
50-100 RPM before retracting from the hole.

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