What does CNMG120412 mean?

CNMG120412 is an ISO 1832 insert designation. It decodes as: C — shape = 80° rhombic (diamond); N — clearance angle = relief angle 0° (negative insert, double-sided use possible); M — tolerance = class M — molded, medium tolerance on inscribed circle and corner point (typically ±0.05–0.13 mm depending on size); G — type = cylindrical fixing hole, chipbreaker on both faces (double-sided insert); 12 — cutting edge length / IC = 12 mm nominal (inscribed circle / edge length class); 04 — thickness = insert thickness 4.76 mm; 12 — corner radius = Rε = 1.2 mm nose radius.

What is CNMG120412 used for?

CNMG120412 is a turning insert. The brand-equivalents table on this page lists each maker's grade and its ISO application window (the P, M, K and similar ranges). Match the geometry first, then choose the grade for your material and operation, and verify on a sample part.

What is the equivalent of CNMG120412 across brands?

CNMG120412 is a shared ISO 1832 geometry, so Sandvik, ISCAR, Kennametal, Walter and other makers each offer it in their own grades and coatings. A cross-reference matches the geometry, not the process, so treat equivalents as starting points and verify on a sample part.

Is CNMG120412 a negative or positive insert?

CNMG120412 has 0° clearance, so it is a negative, usually double-sided insert run in a negative holder: strong and economical for general turning and roughing.

Insert cross-reference · 80° Diamond · 0° clearance · 12mm IC · 1.2mm Rε · heavy roughing

CNMG120412 Cross Reference

Equivalent CNMG120412 inserts across 7 brands — Sandvik, ISCAR, Kennametal, Walter, Tungaloy, Seco, Mitsubishi. Same ISO 1832 geometry class; grades, coatings and application windows differ by manufacturer. Treat equivalents as starting points and verify on a sample part: a cross-reference matches the geometry, not the process.

This is the roughing size of the family: the larger nose radius gives a stronger corner for heavier depths of cut and interrupted work, but raises radial force and the tendency to chatter on slender parts.

Brand equivalents — CNMG120412

Brand	Designation / grade	Coating	Application
Sandvik	CNMG 12 04 12-PR 4335	Inveio® CVD	P30–P40
ISCAR	CNMG120412 IC8350	SUMO TEC® CVD Al₂O₃	P30–P40
Kennametal	CNMG120412 KCP30B	KENGold™ CVD	P30–P40
Walter	CNMG120412 WPP30S	Tiger·tec® Silver CVD	P30–P40
Tungaloy	CNMG120412 T9235	CVD TiCN/Al₂O₃	P30–P40
Seco	CNMG120412 TP3500	Duratomic® CVD	P30–P40
Mitsubishi	CNMG120412 MC6035	CVD Al₂O₃	P30–P40

Grades used Sandvik GC4335 · ISCAR IC8350 · Kennametal KCP30B · Walter WPP30S · Tungaloy T9235 · Seco TP3500 · Mitsubishi MC6035

Catalog availability — who makes CNMG120412

22 brands list CNMG120412 in their published standard programs, with 2,815 catalog variants across chipbreakers, grades and coatings. Variant count shows how deep each maker's standard range goes for this geometry. It is not a quality ranking.

Brand	Catalog variants
Sumitomo	545
Mitsubishi Materials	275
Kennametal	273
Kyocera	264
Sandvik-Coromant	215
Widia	166
Walter	157
Tungaloy	145
Ingersoll	136
SECO Tools	128
Korloy	101
Hoffmann Group	87
Ceratizit	72
ZCC Cutting Tools	67
Iscar	63
Boehlerit	56
WNT	28
Ceramtec	19
Hahn+Kolb	11
Misumi	4
MOLDINO Tool Engineering	2
NTK Cutting Tools	1

Hoffmann Group and Hahn+Kolb are distributor private-label programs (GARANT, ATORN). Counts are catalog listings, not stock levels. Availability varies by region and distributor.

ISO designation decoded — what CNMG120412 means

C — shape: 80° rhombic (diamond)
N — clearance angle: relief angle 0° (negative insert, double-sided use possible)
M — tolerance: class M — molded, medium tolerance on inscribed circle and corner point (typically ±0.05–0.13 mm depending on size)
G — type: cylindrical fixing hole, chipbreaker on both faces (double-sided insert)
12 — cutting edge length / IC: 12 mm nominal (inscribed circle / edge length class)
04 — thickness: insert thickness 4.76 mm
12 — corner radius: Rε = 1.2 mm nose radius

Cross-reference a grade at its ISO position

Type any maker's grade (e.g. GC4325, AC820P, T9215) to see grades other brands publish at the same ISO application position. VERIFIED = multi-source consensus; 2+ CHARTS = placement independently confirmed by two or more manufacturer charts; SINGLE-SOURCE = one chart only. Comparable at ISO position — not identical performance. Verify on a sample part.

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Related designations

CNMG120404 CNMG120408 DCGT11T304 DCMT11T304 DNMG150604 DNMG150608 All designations →