Korloy CNMG120408-HM NC3020 Steel Machining Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy CNMG120408-HM NC3020 (ANSI Standard: CNMG 432) is a high-productivity carbide insert engineered for medium-to-heavy turning of steel. The NC3020 grade features a multi-layer CVD coating designed for superior heat resistance and high-speed wear protection. With a robust 0.8mm (1/32") nose radius, this insert is capable of handling higher feed rates and larger depths of cut, making it the industry benchmark for carbon and alloy steel production.
Efficiency Tip: If you have a rigid setup and a modern CNC machine, NC3020 allows you to push higher surface speeds (Vc) compared to the tougher NC3030, reducing your cycle times significantly.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG120408-HM |
| ANSI Code | CNMG 432 |
| Grade | NC3020 (High-Speed Steel General Purpose) |
| Nose Radius | 0.8 mm (1/32") - High Feed Strength |
Core Performance Benefits:
- Advanced CVD Multi-Layer Coating: Protects against crater wear and high-temperature oxidation, allowing for longer tool life in high-speed applications.
- HM Universal Chipbreaker: Optimized for stable chip control at various depths of cut (ap), effectively breaking chips in both semi-finishing and roughing operations.
- Rigid Edge Strength: The 0.8mm radius provides the structural integrity needed to handle higher feed rates without edge chipping.
- Economic 4-Corner Design: Double-sided negative insert provides 4 usable cutting edges, lowering your cost-per-part in high-volume production.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (e.g., 1045) | 180 - 350 m/min | 0.20 - 0.50 mm/rev | 1.5 - 6.0 mm |
| Alloy Steel (e.g., 4140) | 150 - 300 m/min | 0.15 - 0.40 mm/rev | 1.0 - 5.0 mm |
Compatible Tool Holders:
Ensure maximum clamping force and rigidity with these high-performance D-Type or M-Type holders:
- External Turning: PCLNR/L 2020K12 / PCLNR/L 2525M12 / DCLNR/L 2525M12
- Internal Boring Bars: S32T-PCLNR12 / S40T-PCLNR12
The Professional Choice: NC3020 vs. NC3030
How to choose the right steel turning grade?
Optimized for continuous high-speed turning. Best choice when tool flank wear is the primary concern.
Optimized for interrupted cuts, heavy scale, and unstable machines. Use this if the tool is chipping.
Machinist's Tip: For large volume steel jobs with steady cuts, NC3020 will typically outperform NC3030 in parts-per-edge and surface finish.
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.