Korloy CNMG120404-HM NC3030 Steel Roughing Turning Insert (10pcs)
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The Original Korloy CNMG120404-HM NC3030 (ANSI Standard: CNMG 431) is the ultimate workhorse for medium to heavy steel turning. Engineered for reliability in unpredictable conditions, the NC3030 grade features a thick, heat-resistant CVD coating and a highly reinforced substrate. Whether you are facing interrupted cuts, heavy scale, or unstable machine setups, this insert provides the impact resistance needed to keep your production running without unexpected downtime.
Proven Performance: The CNMG1204 size offers maximum structural rigidity, making it the primary choice for larger CNC lathes and heavy-duty industrial components.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG120404-HM |
| ANSI Code | CNMG 431 |
| Grade | NC3030 (Heavy CVD Steel Specialist) |
| Chipbreaker | HM (Medium-Roughing) |
Core Performance Benefits:
- Maximum Fracture Toughness: Specialized NC3030 substrate absorbs high-frequency vibrations and mechanical shocks during interrupted cuts.
- Double-Sided Value: Features 4 usable cutting edges, offering the best cost-per-part ratio for high-volume manufacturing.
- HM Chipbreaker: Designed for wide-ranging chip control, effectively breaking chips in both medium finishing and heavy roughing depths of cut.
- Thermal Barrier Coating: The thick CVD Alumina layer allows for machining at high temperatures without compromising edge geometry.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel | 160 - 320 m/min | 0.15 - 0.45 mm/rev | 1.0 - 5.0 mm |
| Alloy Steel / Die Steel | 130 - 260 m/min | 0.12 - 0.35 mm/rev | 0.8 - 4.0 mm |
Compatible Tool Holders:
Maximize your machine's potential by pairing these inserts with high-performance D-Type or M-Type holders:
- External Turning: MCLNR/MCBNR/MCKNR/MCFNR/MCMNN/MCGNR
- Large Boring Bars: S32T-MCLNR12 / S40T-MCLNR12
Steel Grade Pro-Tip: NC3030 vs. NC3120
Selecting the best tool for your production line:
Optimized for toughness. Use this for interrupted cuts, rough outer surfaces, and unstable clamping setups.
Optimized for wear resistance. Best for high-speed, continuous finishing on stable machines.
Machinist's Tip: For CNMG 431 inserts, always ensure the seat (shim) of your tool holder is clean and flat, as heavy roughing with NC3030 creates significant downward pressure.
Packaging: 10 pieces per box.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.