Sumitomo General Catalog 2025-2026

Turning 80˚ Diamond Negative Inserts

Indexable Insert

CN 80° Diamond Neg. With Hole CN ¢¢ 64 ˜ Dimensions (inch) Cutting Edge Length L .7598 Thickness S .2500 Inscribed Circle IC .7500 Hole Dia. D1 .3126

RE

IC

Grade Selection

A2, A3

Chipbreaker Selection B10 on Insert Grade Selection by Part Material

A10 on

S

80°

L

: Interrupted Cutting 1st Recommended : Interrupted Cutting 2nd Recommended

: General Cutting 1st Recommended : General Cutting 2nd Recommended

: Continuous Cutting 1st Recommended : Continuous Cutting 2nd Recommended

P Steel M Stainless Steel K Cast Iron N Non-Ferrous Metal S Exotic Alloy H Hardened Steel

B

Coated Cermet

Coated Carbide

Carbide

Cermet

C5

E12

Applicable External Holders

Applicable Internal Holders

Nose Radius

Application Range

Shape

Sumitomo Cat. No.

ISO Cat. No.

RE

EGZ

CNMG643EGZ CNMG190612N-GZ CNMG644EGZ CNMG190616N-GZ

Q Q

QQQQQ QQ QQQQQ QQ

( a p )

.0469 .0625

●★● ★★★

.40

.20

( f )

0

0 °

.020

.040

ENP

CNMM642ENP CNMM190608N-MP .0313

QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ QQQQQ QQ

Q ★★★ Q ★★★ Q ★★★ Q ★★★

( a p )

★★

★ ★

.40

CNMM643ENP CNMM190612N-MP .0469 ★★★★ CNMM644ENP CNMM190616N-MP .0625 ★★★★ CNMM646ENP CNMM190624N-MP .0938 ★★★★

.20

★★ ★★

FF

( f )

0 °

0

.020

.040

EHG

CNMM643EHG CNMM190612N-HG .0469 ★★●★ FFF CNMM644EHG CNMM190616N-HG .0625 ●★★★ FFF CNMM646EHG CNMM190624N-HG .0938 ★★★★ FF

Q Q Q Q Q Q Q Q Q

.40 ( a p )

C

.20

( f )

0

0 °

.020

.040

EHP

CNMM642EHP CNMM190608N-HP .0313 CNMM643EHP CNMM190612N-HP .0469 CNMM644EHP CNMM190616N-HP .0625 CNMM646EHP CNMM190624N-HP .0938

( a p ) .40

★★ ★★ ★★ ★★ ★★ ★★

D

.20

( f )

0

0 °

.020

.040

EHF

CNMM644EHF CNMM190616N-HF CNMM646EHF CNMM190624N-HF

.20 .40 .60 ( a p )

.0625 .0938

R

( f )

0

-15°

.020 .040 .060

: Interrupted Cutting 1st Recommended : Interrupted Cutting 2nd Recommended

: General Cutting 1st Recommended : General Cutting 2nd Recommended

: Continuous Cutting 1st Recommended : Continuous Cutting 2nd Recommended

S

P Steel M Stainless Steel K Cast Iron N Non-Ferrous Metal S Exotic Alloy H Hardened Steel

CN ¢¢ 85 ˜ Dimensions (inch)

Cutting Edge Length L 1.0157 Thickness S .3125 Inscribed Circle IC 1.0000 Hole Dia. D1 .3622

T

Coated Cermet

Coated Carbide

Carbide

Cermet

Nose Radius

Application Range

V

Shape

Sumitomo Cat. No.

ISO Cat. No.

RE

ENP

CNMM856ENP CNMM250724N-MP

Q

QQQQQ QQ

.0938

( a p )

.20 .40 .60

W

( f )

0

0 °

.020 .040 .060

B29

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