Insert cross-reference · 80° Diamond · 0° clearance · 12mm IC · 0.8mm Rε
CNMG120408 Cross Reference / ANSI CNMG 432
Equivalent CNMG120408 inserts across 7 brands — Sandvik, ISCAR, Kennametal, Walter, Tungaloy, Seco, Mitsubishi. In US (inch, ANSI B212.4) catalogs this same insert is listed as CNMG 432 — identical geometry, different designation system. 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.
A general-purpose nose radius: a balance of edge strength and finish that suits most first-choice turning before you tune up for finishing or down for roughing.
Brand equivalents — CNMG120408
| Brand | Designation / grade | Coating | Application |
|---|---|---|---|
| Sandvik | CNMG 12 04 08-PM 4325 | Inveio® CVD Al₂O₃ | P20–P30 |
| ISCAR | CNMG120408 IC8250 | SUMO TEC® CVD Al₂O₃ | P20–P30 |
| Kennametal | CNMG120408 KCP25B | KENGold™ CVD | P20–P30 |
| Walter | CNMG120408 WPP20S | Tiger·tec® Silver CVD | P20–P30 |
| Tungaloy | CNMG120408 T9125 | CVD TiCN/Al₂O₃ | P20–P30 |
| Seco | CNMG120408 TP2500 | Duratomic® CVD | P20–P30 |
| Mitsubishi | CNMG120408 MC6025 | CVD Al₂O₃ | P20–P30 |
Grades used Sandvik GC4325 · ISCAR IC8250 · Kennametal KCP25B · Walter WPP20S · Tungaloy T9125 · Seco TP2500 · Mitsubishi MC6025
23 brands list CNMG120408 in their published standard programs, with 3,885 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 | 670 |
| Kyocera | 474 |
| Kennametal | 374 |
| Mitsubishi Materials | 337 |
| Sandvik-Coromant | 263 |
| Tungaloy | 216 |
| Ingersoll | 215 |
| Widia | 203 |
| Walter | 200 |
| SECO Tools | 180 |
| Korloy | 154 |
| Hoffmann Group | 138 |
| Iscar | 115 |
| ZCC Cutting Tools | 88 |
| Ceratizit | 83 |
| Boehlerit | 74 |
| WNT | 38 |
| Hahn+Kolb | 26 |
| Ceramtec | 22 |
| Misumi | 7 |
| NTK Cutting Tools | 4 |
| MOLDINO Tool Engineering | 3 |
| Nikken | 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 CNMG120408 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
- 08 — corner radius
- Rε = 0.8 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 confirmed by two or more manufacturer-published charts; SINGLE-SOURCE = one chart only. Comparable at ISO position — not identical performance. Verify on a sample part.
Frequently asked questions
What does CNMG120408 mean?
CNMG120408 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; 08 — corner radius = Rε = 0.8 mm nose radius.
What is CNMG120408 used for?
CNMG120408 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 CNMG120408 across brands?
CNMG120408 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 CNMG120408 a negative or positive insert?
CNMG120408 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.
Does this cross-reference favour specific brands?
No. Comparable grades appear here only because manufacturer-published comparison charts place them at the same ISO application position. No manufacturer pays for placement, nothing on this page is sponsored, and CuttingToolsAI sells no tools and earns no commission. Placements backed by a single chart are flagged as such, and every comparison ends the same way: verify on a sample part before switching.
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