CNMG120408MS CA6525 (10pcs)
CNMG120412PT CA5525 (10pcs)
CNMG120412HQ CA5525 (10pcs)
CNMG120412GS CA5525 (10pcs)
CNMG120408PT CA5525 (10pcs)
Kyocera CN 80° Diamond Negative Inserts — CNMG, CNMA Heavy-Duty Steel
Kyocera 80° diamond negative inserts provide the strongest cutting-edge support among standard turning geometries. With 4 usable cutting edges per insert, deep negative-rake pocket, and 80° point angle, CN inserts excel at heavy roughing, profiling, and general turning on steel and stainless.
This catalog covers 53 Kyocera SKUs across CNMG and CNGA geometries. Available in IC 12.7 mm (CNMG 12), IC 15.875 mm (CNMG 16), and IC 19.05 mm (CNMG 19) sizes with cermet (TN60), CVD steel (PR930, PR1125), CVD stainless (CA5525, CA6525), CVD cast iron (CA4515), and ceramic (LX11) grades.
Browse the full Kyocera CN 80° diamond negative catalog, or jump to: About · Featured SKUs · All Categories · Grades · FAQ.
Kyocera-Original Inserts from Japan
All 53 inserts in this catalog are 100% genuine Kyocera — manufactured by Kyocera Corporation in Kyoto, Japan. Each insert is sourced through Kyocera's authorized distribution channels and ships in original Kyocera factory packaging with full Kyocera grade and lot traceability. Kyocera's premium carbide substrates, CVD/PVD coatings, and edge-preparation processes are specified across the full PR / TN / PV / CA / KW grade families — providing the consistent performance and reliability that has made Kyocera the leading Japanese cutting-tool brand.
About Kyocera CN 80° Diamond Negative Inserts
The CN 80° diamond (rhombic) negative geometry is the workhorse standard for heavy steel and stainless work. With 4 cutting edges per insert, wide 80° point angle, and strong negative-rake edge support, CN inserts deliver maximum productivity on tough roughing applications.
Key advantages of the CN family:
- Strongest cutting edge — 80° point + negative rake for heaviest roughing
- 4 cutting edges per insert — good economy vs 3-edge TN triangles
- Heavy IC sizes — CNMG 19 (19.05 mm) for extreme roughing at high DOC
- Versatile — heavy roughing, profiling, general turning in one geometry
The CN family includes sub-designations:
- CNMG — 80° diamond negative w/ hole + molded chipbreaker. The workhorse standard for general turning.
- CNGA — 80° diamond negative w/ hole + no chipbreaker. Ceramic or special-purpose grades.
Kyocera Corporation (Kyoto, Japan) is one of the world's leading manufacturers of CNC cutting tools, with over 60 years of tooling expertise. The Kyocera PR series (CVD-coated steel), TN series (cermet), PV series (PVD-coated stainless), CA series (CVD stainless / cast iron), and KW series (uncoated aluminum) represent decades of grade development.
Featured Kyocera CN Inserts
Twelve representative selections from our 53-SKU Kyocera CN 80° diamond negative catalog.
CNMG120404MQ PR1125 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNGA120404 A66N (10pcs) | High-Performance Insert for Hardened Materials Machining
Standard CNGA insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNGG120404R TN60 (10pcs)
Standard CNGG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120408PS CA6525 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120404MU PR1535 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120404MQ PR1535 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120404PP PV720 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120402PP PV720 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120408HS CA5515 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120408HQ CA5515 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120404HQ CA5515 | Gold Coated General Purpose Insert for Medium Machining
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
CNMG120408HS TN60 (10pcs)
Standard CNMG insert for heavy steel/stainless roughing. Negative-rake edge support for toughest applications.
View All 53 Kyocera CN Inserts →
All Categories — Organized by Sub-Designation & IC Size
This catalog spans 3 sub-designations with 53 total SKUs. Each sub-designation is engineered for a specific application range:
CNMG — 80° Diamond Negative w/ Hole + Molded Chipbreaker (51 SKUs)
The CN workhorse — heavy-duty molded chipbreaker for roughing and finishing across all materials.
- IC 12.7 mm — 51 SKUs with grades PR1125, CA6525, PR1535, PV720, CA5515, TN60, CA5525
CNGA — 80° Diamond Negative w/ Hole (Light Edge, No Chipbreaker) (1 SKU)
Light edge no-chipbreaker for aluminum and finishing work.
- IC 12.7 mm — 1 SKU with grades A66N
CNGG — 80° Diamond Negative Ground Sharp Edge (1 SKU)
Ground sharp edge precision insert for finishing steel and stainless.
- IC 12.7 mm — 1 SKU with grades TN60
Kyocera Grade Family Reference
| Kyocera Grade | Type | Coating | ISO | Best For |
|---|---|---|---|---|
| CA5525 | CVD | TiCN/Al₂O₃ thick | M15-M30 | Stainless + tough steel |
| CA6525 | CVD | TiCN/Al₂O₃ premium | M20-M35 | Stainless premium |
| PR1125 | CVD | TiCN/Al₂O₃ | P10-P25 | Steel high-speed |
| TN60 | Cermet | TiC/TiN | P05-P15 | Steel finishing |
| PR1535 | CVD | TiCN/Al₂O₃ | P15-P30 | Steel turning |
| CA5515 | CVD | TiCN/Al₂O₃ | P15-P30 | Steel turning |
| PV720 | CVD | TiCN/Al₂O₃ | P15-P30 | Steel turning |
Kyocera vs Sandvik — Grade Cross-Reference
| Application | Kyocera Grade | Sandvik Equivalent |
|---|---|---|
| Stainless + tough steel | CA5525 | GC 2025 |
| Stainless premium | CA6525 | GC 2035 |
| Steel high-speed | PR1125 | GC 4315 |
| Steel finishing | TN60 | GC 1525 |
| Steel | PR1535 | GC 4325 |
| Steel | CA5515 | GC 4325 |
How to Choose the Right Kyocera CN Insert
Selecting the correct CN insert involves four decisions:
- Material → Grade: Steel → PR930 / PR1125. Stainless → CA5525 / CA6525. Cast iron → CA4515. Hardened → LX11 ceramic.
- Operation → Chipbreaker: General → TM. Heavy → TH / THS. Cermet finishing → TS / S.
- IC size → Tool holder: CNMG 12 (12.7 mm) → DCLNR/L 12. CNMG 16 (15.875 mm) → DCLNR/L 16. CNMG 19 (19.05 mm) → 19 mm seat.
- Corner radius: 0.4 mm finish, 0.8 mm general, 1.2 mm heavy, 1.6 mm heaviest.
Tip: For general steel work, start with CNMG120408-TM T9125-grade equivalent. For stainless, use CA5525 grade.
Frequently Asked Questions
Are these genuine Kyocera original inserts?
Yes — all 53 products in this catalog are 100% genuine Kyocera originals manufactured by Kyocera Corporation in Kyoto, Japan. Each insert ships in original Kyocera factory packaging with full traceability.
What is the difference between CN and other turning geometries?
CN 80° has the strongest cutting-edge support among standard turning geometries. Wider than DC 55° (more edge strength) but less profile clearance. Use CN for heavy roughing and general turning where edge strength matters most.
What does the IC size mean in this CN family?
IC sizes: CNMG 12 = 12.7 mm, CNMG 16 = 15.875 mm, CNMG 19 = 19.05 mm. Larger IC = thicker insert = higher cutting forces and depths of cut capability.
What tool holder do I need for CN inserts?
CN 80° diamond negative inserts fit standard DCLNR/L, PCLNR/L external turning holders tool holders. Browse our turning tool holder catalog for compatible options.
What grade should I choose for stainless steel?
For stainless steel work, Kyocera recommends CA5525 (CVD M-grade) or PV720 (PVD grade) — both provide superior wear resistance and edge security on 304/316 stainless. Choose CA5525 for heavier roughing; choose PV720 for finishing operations.
How does CN compare to the negative-rake alternative?
CN is a negative-rake insert (no rake angle, strong edge). Compare with positive-rake CC/DC inserts: CN has stronger edge but higher cutting forces. Use CN for heavy work; use CC/DC for finishing + thin sections.
Need Help Selecting the Right CN Insert?
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Related Kyocera & Cross-Brand Catalogs
Kyocera DN 55° Diamond Negative
The 55° profiling alternative.
Kyocera TN 60° Triangle Negative
The 60° triangle negative — 116 Kyocera SKUs.
Kyocera OEM CNC Carbide Inserts
Full Kyocera master catalog.
Tungaloy CN 80° Diamond Negative
The Tungaloy cross-brand equivalent.
Turning Tool Holders — DCLNR / PCLNR
External turning holders for CN negative inserts.
Sample Catalogs — Kyocera Original
Sample packs and grade cross-reference PDFs.
Kyocera, CNMG, CNGA, PR930, PR1125, TN60, CA4515, CA5525, CA6525, LX11 are trademarks and grade designations of Kyocera Corporation (Kyoto, Japan). Distributed by cnchome-beyond.com — Super Industrial Trading Co., Ltd, Hangzhou, China.