Sumitomo General Catalog 2025-2026

Turning 80˚ Diamond Negative Inserts

Indexable Insert

CN 80° Diamond Neg. With Hole CN ¢¢ 86 ˜ Dimensions (inch) Cutting Edge Length L 1.0157 Thickness S .3750 Inscribed Circle IC 1.0000 Hole Dia. D1 .3622

RE

Information in "Shape" column

IC

EFL

Name of Chipbreaker

.12

Application Range

.08

Recommended Part Material

.04

Chipbreaker Rake Angle

0

.008 .016 .024

10 °

Feed Rate (f) (inch/rev)

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

Applicable External Holders

Nose Radius

Application Range

Shape

Sumitomo Cat. No.

ISO Cat. No.

RE

EMU

CNMG866EMU CNMG250924N-MU .0938 ●★●★

Q ★★★

QQQQQ QQ

FF

( a p )

.08 .16 .24

( f )

0

.008 .016 .024

EEM

CNMG866EEM CNMG250924N-EM .0938 ★★★★

Q ★★●

QQQQQ QQ

F

●●

.40 ( a p )

.20

( f )

0

0 °

.020

.040

EME

CNMG866EME CNMG250924N-ME .0938 ●★●★ FFF

C

Q

QQQQQ QQ

( a p )

★★●

.16 .32 .24 .08

( f )

0

.016

.032

ENP

CNMM866ENP CNMM250924N-MP .0938

Q

QQQQQ QQ

.20 .40 .60 ( a p )

D

( f )

0

0 °

.020 .040 .060

R

EHF

CNMM866EHF CNMM250924N-HF CNMM868EHF CNMM250932N-HF

Q Q

QQQQQ QQ QQQQQ QQ

FF

.0938 .1250

★★ ★★

( a p )

.20 .40 .60

( f )

0

.020 .040 .060

-15°

S

T

V

W

B30

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