Sumitomo General Catalog 2025-2026

Chipbreaker Selection

ST Type

GX Type

UM Type

ST Type

GX Type

UM Type

■ Insert Series ● Insert Precision Selection Guide 1.65 0.15 1.65 1.50 0.15 15 °

1.50

2.00

2.00

1.2

1.2

0.15

0.15

15 °

14

14

°

°

● Chipbreaker Selection

Finishing to Light Cutting

Features

M Class

G Class

E Class

FX

Best suited for general- purpose O.D. finishing with larger depths of cut. Burrs are less likely with undercutting. Chatter is less likely with external and face machining. 3D chipbreaker with good chip control and sharp cutting edge. MEFC is for fine finishing, and the MESI is for varying depths of cut. Breaker for aluminum alloy machining. Sharp edge and low adhesion. 1.65 0.15 ST Type

Insert Class

FYS

FY

FP Type

FP Type

Thickness Tolerance

D

±0.005"

±0.005"

±0.001

15

2.15

1.40

Side surfaces are ground. Thickness tolerances are smaller than G-class inserts

1.40

MEFC MESI

Side surfaces have a sintered finish 10 ° 10 °

Side surfaces are ground

Features

4 °

14 °

Roughing to Light Cutting CCMT32.51ELU DCMT21.52ESU

Finishing to Light Cutting CCGT32.51RFX DCGT32.50.5MESI(*)

High-precision to Finishing

FT Type

SJ Type

GX

Applications

NAG

CCET32.50.5RFX 1.35

1.2

Cat. No.

0.15

0.18

(*) A catalog number with a feed direction symbol prefixed with “M” means that the product has a nose radius with negative tolerance.

■ Application Range of Chipbreakers for Finishing to Light Cutting

R

S

C D

T

V

W

UJ Type

RD Type

AW Type

UJ Type

RD Type

AW Type

● M Class Finishing to Light Cutting

● G Class Ground Type

● G Class Chipbreaker

1.5

1.5

10.5

10.5

2.0

2.0

1.15

0.1

0.1

R

S

C D

T

V

W

25°

25°

0.16

0.16

0.16

MESI Type

R

S

C D

T

V

W

EFK Type ESU Type

FX Type MM Type

C Type

FP Type

SD Type

0.08

0.08

0.08

SDW Type

R

2.15 S

C D

T

V

W

W Type

ELUW Type

2.95

1.40

EFP Type

0.15

0.15

FYS Type

EFC Type

ELU Type

10 °

FY Type

10 °

14 °

0 C D

0

0

R

S

R

S

0.008 R

S

R

S

C D

C D

C D

T

V

0.008 W

T

V

W

T

0.016 V

W

T

0.008 V

W

0.016

0.016

Feed Rate f (IPR)

Feed Rate f (IPR)

Feed Rate f (IPR)

AY Type

AY Type C D

■ Chipbreakers for Finishing to Light Cutting

Dimensions (mm)

R

S

R

S

R

S

R

S

C D

C D

C D

T

V

W

T

V

W

T

V

W

T

V

W

Positive Type M Class

5

2.5

2.5

2.5

PMK N S ELU 15° 15° C D T R S

EFP Fine cutting breaker with two-step breaker structure PMK N S C D T R V S

ELUW High-performance finishing breaker with wiper edge PMK N S C D T R V S W

EFK Finishing breaker with sharp edge and good chip control PMK N S C D T R V S

ESU General-purpose PMK N S

30°

W

W

W

V

Chip control significantly improved in fine cutting

breaker with sharp edge

1.45 8°

0.8

1.1

1.4

1.5

FW Type W V C D

SS Type W C D

UJ Type

RD T

R

S

R

S

R

S

R

S

C D

C D

T

V

W

T

T

V

T

V

W

15°

10°

0.7

Wiper Insert

10°

1.5

7° Relief Angle 0.90

1.15

5° 7° 11° Relief Angle

7° 11° Relief Angle

11° Relief Angle

7° 11° Relief Angle 0.1

TPMT33 ○○

CCMT32.5 ○○

CCMT32.5 ○○

CCMT32.5 ○○

TPMT33 ○○

5° T

5° T

R

S

R

S

R

S

R

S

R

S

C D

C D

C D

C D

C D

T

V

W

T

V

W

V

W

V

W

T

V

W

15 °

(mm) EFB FB Type 6

Depth of Cut ELB (mm)

(mm)

PMK N S

Relief Angle 7° Pos. 11° Pos. Light-cutting breaker with sharp edge and good chip control PMK N S T V S

(mm)

Relief Angle 5° Pos. 7° Pos. 11° Pos. W V

6

6 LB Type

4 FB Type C D

LB Type C D R

Relief Angle 11° Pos.

6

Relief Angle 7° Pos. 11° Pos. V

Depth of Cut Chipbreaker for finishing of mild steel achieves good chip control and excellent machined surface quality T R S

Depth of Cut C D 4

R

S

R

S

R

S

C D

4 C D

W

T

V

W

T

V

W

T

W

Depth of Cut

4

0

2

0.5

0.5

0.8

2

0.8

2

2

15°

15°

0

0

0.2

0.4

0.6

0.2

0.4 20°

0.6

0

0

20°

15° V

15° W

R

S

R

S

R

S

R

S

R

S

0.2 C D

C D

C D

C D

C D

T

V

W

T

V

W

T

T

V

W

T

V

W

0.4

0.6

0.2

0.4

0.6

Feed Rate (mm/rev)

Feed Rate (mm/rev)

Feed Rate (mm/rev)

Feed Rate (mm/rev)

5° 7° 11° Relief Angle

5° 7° 11° Relief Angle

CCMT32.5 ○○

CCMT32.5 ○○

Positive G Class Ground Chipbreaker

R

S

R

S

R

S

R

S

R

S

C D

C D

C D

C D

C D

T

V

W

T

V

W

T

V

W

T

V

W

T

V

W

FYS

FX

FY

SD

AY

PMK N S

PMK N S

Wide breaker with sharp edge PMK N S S T V

Stepped parallel ground type PMK N S S T V

PMK N S High-quality ground aluminum breaker achieving excellent machined surface quality W T V S

EM Type

AX Type C D

AY Type C D R

Fine cutting breaker with sharp edge R V S T

Parallel breaker with sharp edge R V S T

R

R

C D

C D

C D

W

W

W

W

0.9

0.5 15°

1.5 15°

0.9

2.50

2.5

2.5

0.05

15°

15°

30°

R

S

R

S

R

S

R

S

R

S

C D

C D

C D

C D

C D

T

V

W

T

V

W

T

V

W

T

V

W

T

V

W

0.4

5° 7° 11° Relief Angle

7° 11° Relief Angle

5° 7° 11° Relief Angle

5° 7° 11° Relief Angle

5° 7° Relief Angle

CCGT04X1 ○○

TPGT22 ○○

TPGT22 ○○

TPGT22 ○○

CCGT32.5 ○○

25°

25°

C D K N S H (M)EFM R W V

(mm) (M)EFF 6 C D R

(mm) C D Peripheral grinding 3D breaker with good chip control and sharp edge PMK N S H (M)EFC 6 T R S

(mm) (M)ESI 6 C D R

(mm) (M)ESL PM 6 C D R S

PM N S H Sharp edged breaker for a wide range of applications from finishing to light cutting. W T V S K

W Two-step breaker for light cutting PMK N S H T V S

W Outstanding chip evacuation in fine cutting conditions PMK N S H 0.45 T V S

Relief Angle 5° Pos. 7° Pos. 11° Pos. W V

T

Slant edged breaker for excellent suppresion and chip control at multiple depths.

Relief Angle 5° Pos. 7° Pos. 11° Pos.

Relief Angle 5° Pos. 7° Pos. 11° Pos.

Relief Angle 7° Pos. 11° Pos.

Depth of Cut

4

Depth of Cut

Depth of Cut

Depth of Cut

4

4

4

0.9

1.0

0.5 15°

0.8 15°

2

T 15°

R

S

R

S

R

S

R

S

R

S

C D

C D

C D

C D

2 C D

V

W

T

V

W

T

V

W

T

V

W

T

V

W

2

2

0.4 15° CCGT32.5 SS

0

0.6 GH Type

0.6 RH Type 7° 11° Relief Angle

0.6 FB Type 7° Relief Angle

LB T

0.2

0.4

0

0

0

0.2

0.6

0.2

0.4

0.2

0.4

Feed Rate (mm/rev)

7° 11° Relief Angle

7° 11° Relief Angle

5° 7°

CCGT32 ™

CCGT32 ™

CCGT32 ™

CCGT22 ™

Feed Rate (mm/rev)

Feed Rate (mm/rev)

Feed Rate (mm/rev)

C D (mm) 6

R

S

R

S

R

S

R

S

R

S

C D

C D

C D

C D

T

V

W

T

V

W

T

V

W

T

V

W

T

V

W

Relief Angle 7° Pos. 11° Pos.

0.30

0.5

3.5

15°

Applicable Part Material: P Steel M Stainless Steel K Cast Iron N Non-Ferrous Metal S Exotic Alloy Depth of Cut 4

D7

(mm)

-15°

6

20°

Relief Angle 7° Pos.

nded Breaker d Breaker

C D 2

R

S

R

S

R

S

R

S

R

S

C D

C D 4

C D

C D

T

V

W

T

V

W

T

V

W

T

V

W

T

V

W

Depth of Cut

0

For Chamfering

For Chamfering

0.2

0.4

0.6

2

Feed Rate (mm/rev)

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