List 5171 - EXOCARB® WH70
Hardened Steels
Work Material
D2-S7 55-60 HRC
D2, CPM-9V 60-70 HRC
Drilling Speed Drill Dia.
33-52 SFM
26-42 SFM
Speed RPM
Feed IPR
Speed RPM
Feed IPR
mm 2
2,080 1,375 1,030
0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002
1,670 1,100
0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002 0.001 - 0.002
3 4 5 6 7 8 9
825 660 550 470 410 360 260 300 275 235 220 205 195 180
825 680 590 515 450 410 375 340 290 270 260 240 230
10 11 12 14 15 16 17 18
1. Use a water soluble oil with high density (5 to 10 times dilution). 2. Tight clamping is critical. 3. For drilling depth > 3D, use a step feed. 4. For materials susceptible to chip packing in the flute, apply a step feed.
List 5172 - EXOCARB® XH
Work Material Drilling Speed Drill Dia.
Broken Taps & Drills
65-80 SFM
Speed RPM
mm 2
3,190 - 3,930 2,100 - 2,590 1,580 - 1,940 1,260 - 1,550 1,050 - 1,290 900 - 1,110
3 4 5 6 7 8 9
790 - 970 700 - 860 630 - 780 570 - 705 530 - 650
10 11 12
1. Use a drilling speed of 65-80 SFM. 2. Hand feed of 0.0005~0.001 in/rev is normal. 3. Use a rigid holder. 4. Select a high quality cutting oil and apply in sufficient amounts. 5. This tool should not be used to drill soft steels, aluminum alloys or other soft materials. 6. Resharpening should be done periodically. 7. For through hole processing of heat treated steels, use a spare piece of material underneath the material being drilled as this will prevent breakage caused by sudden torque. 8. Cannot be used to remove forming taps.
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Drilling Technical
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