Korloy CNMG120408-HM NC3030 Heavy-Duty Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy CNMG120408-HM NC3030 (ANSI Standard: CNMG 432) is the ultimate choice for high-efficiency steel roughing. Designed with a robust 0.8mm (1/32") nose radius, this insert is built to handle high feed rates and significant depths of cut. The NC3030 grade features a thick CVD coating that excels in demanding environments, providing the perfect balance between wear resistance and the toughness required for interrupted cuts and scaly surfaces.
Power User Tip: The CNMG 432 (R0.8) radius offers significantly higher edge strength than the R0.4 version, making it the industry standard for removing large amounts of material in the shortest time.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG120408-HM |
| ANSI Code | CNMG 432 |
| Grade | NC3030 (Heavy CVD Steel Specialist) |
| Nose Radius | 0.8 mm (1/32") - High Strength |
Core Performance Benefits:
- Maximum Metal Removal: The R0.8 radius allows for aggressive feed rates, reducing cycle times for large-diameter steel parts.
- Shock Absorption: The specialized NC3030 substrate is designed to prevent chipping even during heavy interruptions or when cutting through weldments.
- Double-Sided Efficiency: With 4 usable cutting edges, the CNMG series provides excellent economic value for high-volume workshops.
- Advanced CVD Technology: A thick alumina layer acts as a thermal shield, extending tool life during high-heat dry machining or high-pressure coolant applications.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 150 - 320 m/min | 0.20 - 0.50 mm/rev | 1.5 - 6.0 mm |
| Alloy Steel (4140) | 120 - 240 m/min | 0.15 - 0.40 mm/rev | 1.0 - 5.0 mm |
Compatible Tool Holders:
To fully utilize the 0.8mm radius of the CNMG 432, we recommend high-rigidity D-Type or M-Type holders:
- External Turning: PCLNR/L 2020K12 / PCLNR/L 2525M12 / DCLNR/L 2525M12
- Heavy Boring Bars: S32T-PCLNR12 / S40T-PCLNR12
Steel Shop Guide: NC3030 vs. PC5300
Which toughness leader do you need?
Best for Steel only. Superior heat resistance for high-speed roughing and heavy removal on larger CNC lathes.
Best for Steel & Stainless. Better for smaller machines or jobs where versatility across materials is needed.
Machinist's Tip: If your chip looks too blue or your edge is melting, the CVD-coated NC3030 is the upgrade you need for better heat management.
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.