Coated Grades for Steel Turning AC8115P/AC8020P/AC8025P/AC8035P
█ AC8020P Cutting Performance
Balance of high wear resistance and stability. Chipping resistance 2.5x or more
AC8020P
High Ef ciency
Standout Chipping Resistance
High Strength Alumina Layer
Alumina layer with even higher strength suppresses chipping
AC8020P
400 impacts
1,600 impacts
4,000 impacts
SEM image
Cracks suppressed through higher strength
Al 2 O 3
Minor damage Minor damage Minimal chipping
Conventional Tool
400 impacts
1,600 impacts
SEM image
Cracks occur due to insufficient impact resistance
Chipping
Al 2 O 3
Minimal chipping End of tool life
Workpiece Material: 4137 Steel (Forged Part With Interrupted Sections) Insert: CNMG432EGU (AC8020P) Cutting Conditions: v c = 820 SFM f = .0118 IPR a p = .059” Wet
█ AC8020P Recommended Cutting Conditions
Min. - Max.
Mild Steel ( A283 , etc.) Low Carbon Steel ( 1018 , etc.) Low-alloy Steel ( 8620 , etc.) 180HB or less
High Carbon Steel ( 1040 , etc.) High-alloy Steel ( 4140 , etc.) 180HB or more
Insert Shape / Cutting Edge Length
Chipbreaker
Depth of Cut a p (Inch)
Feed Rate f (IPR)
Cutting Speed v c (SFM)
Depth of Cut a p (Inch)
Feed Rate f (IPR)
Cutting Speed v c (SFM)
.004 .020 .020 .031 .071 .039 .118 .031 .071 .059 .118 .071 .079 .118
.047 .079 .098 .197 .236 .236 .315 .197 .236 .276 .315 .236 .315 .354
EFE ELU/ESU/ESE ESEW EGU/EGE/EUX EMU EME EHG EGU/EGE/EUX
- - - - - - - - - - - - - -
.004 .004 .004 .004 .008 .008 .014 .006 .008 .008 .014 .008 .008 .014
.016 .016 .024 .018 .024 .028 .031 .018 .024 .028 .031 .024 .028 .031
- - - - - - - - - - - - - -
591 525 525 525 459 459 394 361 394 394 361 394 394 361
1476 1378 1378 1378 1148 1148 1083 1148
- - - - - - - - - - - - - -
427 394 394 394 328 328 328 328 328 328 262 328 328 262
1312 1214 1214 1214
- - - - - - - - - - - - - -
.004 .004 .004 .004 .008 .008 .014 .006 .008 .008 .014 .008 .008 .014
.016 .016 .024 .018 .024 .028 .031 .018 .024 .028 .031 .024 .028 .031
- - - - - - - - - - - - - -
.004 .020 .020 .031 .071 .039 .118 .031 .071 .059 .118 .071 .079 .118
.047 .079 .098 .197 .236 .236 .315 .197 .236 .276 .315 .236 .315 .354
- - - - - - - - - - - - - -
CNM 43 TNM 33 DNM 43 TNM 43 SNM 43 WNM 43
984 984 984 984 820 820 722 820 820 722
EMU EME EHG EMU EME EHG
984 984 886 984 984 886
CNM 54 SNM 54
CNM 64 SNM 64 CNM 86 SNM 86 DNM 54 TNM 54
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