Sumitomo General Catalog 2025-2026

Chipbreaker and Grade Selection Guide for Turning Steel

Steel

■ Application Guide

*Chipbreaker dimensions in mm

EGU Type Chipbreaker 1st Recommended 2.05 0.25 7° 25°

1st Recommended Grade AC8025P

A

Chipbreakers for High-efciency Machining

Main Chipbreakers Strong Cutting Edge Chipbreakers

EFE Type

ESE Type

ESU Type

ESX Type

1.3

1.40

1.35

1.5

0.2

0.1 5 °

Finishing to Shallow Depth of Cut

13°

0.70

15°

17 °

20°

EGE Type

EGU Type

EUX Type

2.0

2.05

2.0 15°

0.25

0.25

0.25

25°

General-purpose

23°

1st Recommended

EME Type

EMX Type

EMU Type

2.3 0.2 0.4 -15 °

2.5

2.4

0.3

Roughing to Large Depth of Cut

0.3 4°

20 °

20 °

4 °

AC8015P High-speed Machining Better Wear Resistance

AC8035P Interrupted Machining Better Toughness

EGU Type

EFE Type

1.40

2.05

0.25

To improve tool life

To improve tool life

0.70

25°

20°

EUX Type

ESE Type

1.5

2.0 15°

To improve machining efciency

To improve machining stability

0.1 5 °

0.25

17 °

Better Performance

AC8020P

High Efficiency

EGU Type

EGE Type

2.0

2.05

To increase feed rate

To increase cutting speed

0.25

0.25

25°

23°

Dimensions in mm

Recommended Cutting Conditions

Steel

(Red text indicates 1st recommendation)

Workpiece Material

Cutting Process

Cutting Conditions

Min. - Max.

Chipbreaker

Grade

Depth of Cut a p (inch)

Cutting Speed v c (SFM)

Feed Rate f (IPR)

T1500Z

Fine Finishing EFB Finishing EFE

.008 - .040 .020 - .060 .040 - .160 .060 - .240 .008 - .040 .020 - .060 .040 - .160 .060 - .240 .008 - .040 .020 - .060 .040 - .160 .060 - .240

.002 - .010 .004 - .016 .008 - .020 .012 - .024 .002 - .010 .004 - .016 .008 - .020 .012 - .024 .002 - .010 .004 - .016 .008 - .020 .012 - .024

330 - 1500 850 - 1600 650 - 1200 450 - 800 330 - 1100 700 - 1400 500 - 850 350 - 600 160 - 900 550 - 1100 400 - 750 300 - 550

AC8015P

Mild Steel (SS400 and others)

EGU AC8025P

Medium

AC8035P

Rough EMU Fine Finishing EFB Finishing EFE

T1500Z

Carbon Steel Alloy Steel (S45C, SCM435, and others) Hard Steel Alloy Steel (SCM440H and others)

AC8015P

EGU AC8020P

Medium

AC8035P

Rough EMU Fine Finishing EFB Finishing EFE

T1500Z

AC8015P

EGU AC8020P

Medium

AC8035P

Rough EMU

A13

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