Chipbreaker and Grade Selection Guide for Turning Steel
Steel
Grades AC8015P / AC8020P / AC8025P / AC8035P / AC1030U
Covers a wide range of machining applications from high-speed to interrupted cutting and small lathes AC8015P : Development of crater damage is suppressed by controlling the orientation of the alumina crystal grains. Achieves long, stable tool life during high-speed and high feed cutting. AC8020P: Alumina coating with even higher strength balances outstanding stability and wear resistance in turning mill-scale on forged material. Gold-colored coating makes used corners easily identifiable. AC8025P : Our 1st recommended grade for turning steel. Surface smoothing technology significantly suppresses adhesion of work material components. Achieves long, stable tool life with various cutting speeds and work materials. AC8035P : Tensile stress removal of the coating layer greatly improves fracture resistance. Achieves long, stable tool life during heavy interrupted cutting. AC1030U : E mploys a new PVD coating, and a dedicated tough carbide substrate. High-quality cutting edge grade suppresses adhesion and micro-chipping, realizing excellent machined surface quality.
A
Performance
AC8015P
AC8020P
D Alumina crystal grain orientation control technology suppresses crater damage due to chip abrasion
D Alumina coating with even higher strength suppresses chipping
AC8015P
AC8020P
Conventional Tool
Conventional Tool
5min
5min
400 impacts
400 impacts
TiCN layer exposed
Minimal chipping
Minor wear
Minor damage
14min
17min
1600 impacts
1600 impacts
Tool life
Tool life
TiCN layer exposed
Minor damage
29min
Crater damage progression due to peeling of alumina layer Work Material: SUJ2 (External Continuous) Insert: CNMG120408N-GU Cutting Conditions: vc=985 SFM, f=.012 IPR , ap=.060”, Wet
Chipping
4000 impacts
Tool life
Minimal chipping
Work Material: SCM435 (Includes Intermittent Forged Sections) Insert: CNMG120408N-GU Cutting Conditions: vc=820 SFM, f=.012 IPR, ap=.060”, Wet
Twice the crater wear resistance
Chipping resistance improved 2.5 times or more
Suppresses crater damage due to chip scraping
Balance of high wear resistance and stability
AC8025P D Surface smoothing treatment significantly suppresses adhesion and chipping
AC8035P D Special surface treatment reduces tensile stress in the coating layer, significantly suppressing breakages
AC8025P
Conventional Tool
AC8035P
Conventional Tool
2min
2min
0.20
0.20
0.25
0.25
Normal wear
Adhesion
0.30
0.30
70min
70min
0
250
500
0
250
500
No. of Impacts
No. of Impacts
Minor damage only, able to continue
Chipping
120min
Unable to continue
All corners able to continue
Unable to continue
Minor damage only, able to continue
Work Material: SCM415 (Face) Insert: CNMG120408N-GU Cutting Conditions: vc=330-985 SFM, f=.012 IPR , ap=.060”, Wet
Work Material: SCM435 (External Interrupted) Insert: CNMG120408N-GU Cutting Conditions: vc=525 SFM, f=.008-.012 IPR , ap=.080”, Dry
At least twice the adhesion/fracture resistance
At least twice the fracture resistance
Suppresses adhesion with ultra-smooth surface
Suppresses crack growth and breakages by reducing tensile stress
A12
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