Chipbreaker and Grade Selection Guide for Turning Cast Iron
Cast Iron
Grades Coated Grades for Cast Iron AC4010K / AC4015K / AC4125K
Coated SUMIBORON BNC500
SUMIBORON BN7000
Solid SUMIBORON BNS800
L7
Chipbreaker Selection
● FC (Gray Cast Iron)
● FCD (Ductile Cast Iron)
EGU
Our 1st recommended grade for machining cast iron AC4015K General finishing breaker that is both sharp and strong Our 1st recommended breaker AC4125K 1st recommended grade for Interrupted Cutting with excellent cutting edge strength and high versatility Roughing breaker that Low-resistance breaker suitable for machining workpieces with low rigidity such as ones that are narrow and long demonstrates both sharpness and strength in high-feed machining Excellent cutting edge strength, ideal for large depths of cut and interrupted machining
6,000
2.05
0.25
25°
1,500
7°
A
No Chipbreaker
EME
High-speed Continuous Cutting AC4010K 1.9 14°
3,000
ENZ
BN7000 ENZ
0.25
BNS800
4°
1,000
High-speed Continuous Cutting AC4010K
1,500
EGZ
1.9
BNC500
0.25
16°
600
1000
Our 1st recommended grade for machining cast iron AC4015K EGU
AC4125K 1st recommended grade for Interrupted Cutting
EME
EGZ
600
2.4
0.3
4°
Low
High
AC8025P
300
AC8025P No Chipbreaker
Work Material Rigidity
300
Finishing
Roughing
Finishing
Roughing
Partially Interrupted
Interrupted
Continuous
Partially Interrupted
Interrupted
Continuous
Chipbreaker Application Range
Chipbreakers
D Negative
D Positive
Negative Type
Positive Type
No Chipbreaker
.24
.24
EME
EME
No Chipbreaker
No Chipbreaker
.240
.240
EME Type
EME No Chipbreaker
No Chipbreaker No Chipbreaker
EME Type
.16
.16
EGZ
EGU
No Chipbreaker
GEGUU
ENZ
EGZ
.160
.160
EGZ Type
No Chipbreaker EMU
EGZ Type
EMU
EGZ
EMU Type
ENZ
.08
.08
EMU Type
ENZ
ENZ Type EGU
EMU Type
.080
.080
EGU Type
EGU Type
Feed Rate f (IPR) .008 .016
.024
Feed Rate f (IPR) .008 .016
.024
0
0
Sharp Edge Strong Cutting Edge
Sharp Edge Strong Cutting Edge
ENZ Type
0
0
.008
.016
.024
Feed Rate f (IPR) .008 .016
.024
Sharp Edge
Strong Cutting Edge
Sharp Edge
Strong Cutting Edge
Feed Rate f (IPR)
Recommended Cutting Conditions
Cast Iron
(Red text indicates 1st recommendation) (Red text indicates 1st recommendation)
Recommended Cutting Conditions
Cutting Conditions
Min. - Max.
Work Material
Grade
Application
Depth of Cut ap (inch)
Cutting Speed (vc) (SFM)
Feed Rate f (IPR)
.020 - .236 .020 - .236 .020 - .236 .020 - .236 .020 - .236 .020 - .236 .020 - .236 .020 - .236 .020 - .236
.004 - .016 .004 - .020 .004 - .024 .004 - .016 .004 - .020 .004 - .024 .004 - .016 .004 - .020 .004 - .024
655 - 2300 590 - 1475 490 - 985 590 - 1475 525 - 1310 395 - 820 525 - 1310 460 - 1150 260 - 720
AC4010K AC4015K AC4125K AC4010K AC4015K AC4125K AC4010K AC4015K AC4125K
Continuous to General Interrupted Heavy Interrupted Continuous General to Interrupted Heavy Interrupted Continuous General to Interrupted Heavy Interrupted
Gray Cast Iron (example: FC250)
Ductile Cast Iron (example: 60-40-18)
High-strength Ductile Cast Iron (example: 100-70-03)
A16
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