Page 10 - HOLE_MAKING_CATALOG_INCH_2022_P187-P236

Recommended Machining Conditions for SCD-SXC40 & SCD-SXC50 Solid Carbide Drills
SOLID CARBIDE DRILLS
Tensile Material Cutting Feed
Strength Hardness Group Speed f [IPR]
ISO Material Condition [ksi] HB No. vc [SFM] .125-.157 .161-.196 .2-.236 .24-.275 .28-.314
<0.25% C Annealed 61 125 1
≥0.25% C Annealed 94 190 2
Non-alloy steel <0.55% C Quenched and 123 250 3
and cast steel, tempered 180-213 .0023-.0047 .0023-.0055 .003-.0063 .0039-.007 .0047-.0078

free cutting steel Annealed 109 220 4
≥0.55% C Quenched and 145 300 5
tempered
Annealed 87 200 6
Low alloy and cast steel
P 135 275 7
(less than 5% of Quenched and 145 300 8 147-213 .0023-.0039 .0023-.0047 .003-.0055 .0039-.0063 .0047-.007
alloying elements) tempered
174 350 9
Annealed 99 200 10
High alloyed steel, cast Quenched and 114-180 .0015-.003 .0023-.0039 .0023-.0047 .003-.0055 .0039-.0063
steel and tool steel 160 325 11
tempered
Ferritic/ 99 200 12
Stainless steel and cast steel martensitic 98-147 .0015-.003 .0023-.0039 .0023-.0047 .003-.0055 .0039-.0063
Martensitic 119 240 13
Austenitic,
M Stainless steel and cast steel 87 180 14 82-148 .0015-.003 .0023-.0039 .0023-.0047 .003-.0055 .0039-.0063
duplex
Ferritic / 180 15
pearlitic
Gray cast iron (GG) 198-230
Pearlitic /
martensitic 260 16
K Ferritic 160 17 .0039-.007 .0047-.0078 .0055-.0086 .0055-.0094 .0063-.0100
Nodular cast iron (GGG) 180-213
Pearlitic 250 18
Ferritic 130 19
Malleable cast iron 164-198
Pearlitic 230 20
Annealed 200 31
Fe based 98-114 .0015-.003 .0023-.0039 .0023-.0047 .003-.0055 .0039-.0063
High temperature Hardened 280 32
Annealed
33
250
alloys Ni or Co Hardened 350 34 82-98 .0015-.003 .0023-.0039 .0023-.0047 .003-.0055 .0039-.0063
S based Cast 320 35
Pure 58 110 36
Titanium alloys Alpha+Beta 98-114 .0015-.003 .0023-.0039 .0023-.0047 .003-.0055 .0039-.0063
alloys, 152 310 37
hardened

Recommended Drilling Procedure for Deep Hole Drilling
1 Drill a pilot hole 1-2xD deep with a short drill. The pilot drill
should be .001”-.002” larger than the long drill and its point 1
angle should 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.

- 40xD & 50xD must utilize a 20xD intermediary drill along with pilot drill.
- In through holes, the tool exit should not exceed .078”-.118”.

194 ISCAR