Korloy CNMG090304-HM NC3030 Steel Turning Insert (10pcs)
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The Original Korloy CNMG090304-HM NC3030 (ANSI Standard: CNMG 32.1) is a high-performance CVD-coated carbide insert designed for medium-to-heavy turning of steel. The NC3030 grade is world-renowned for its exceptional balance between wear resistance and fracture toughness. Featuring a thick alumina coating, it provides an excellent thermal barrier, making it the primary choice for machining carbon steels and alloy steels even under unstable conditions or interrupted cuts.
Workshop Essential: Facing tool chipping on rough steel surfaces? The NC3030 grade's reinforced substrate is designed to absorb impact where other finishing grades fail.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG090304-HM |
| ANSI Code | CNMG 32.1 |
| Grade | NC3030 (CVD Steel General Purpose) |
| Chipbreaker | HM (Semi-Roughing / Medium Cut) |
Core Performance Benefits:
- Enhanced Edge Toughness: Specialized CVD coating combined with a high-strength substrate prevents sudden breakage during interrupted machining.
- Superior Thermal Resistance: The thick Al2O3 (Alumina) layer protects the insert from the high temperatures generated during heavy metal removal.
- HM Geometry: The HM chipbreaker is optimized for medium cutting depths, ensuring excellent chip curling and evacuation, which prevents workpiece damage.
- Double-Sided Value: As a negative insert, the CNMG090304 offers 4 usable cutting edges, maximizing your cost-per-edge.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (1018) | 150 - 300 m/min | 0.10 - 0.35 mm/rev | 0.5 - 3.5 mm |
| Alloy Steel (4140/SCM440) | 120 - 250 m/min | 0.08 - 0.30 mm/rev | 0.5 - 3.0 mm |
Compatible Tool Holders:
For high-productivity steel turning, pair these inserts with standard D-Type or M-Type holders:
- External Turning: PCLNR/L 1616H09 / PCLNR/L 2020K09 / DCLNR/L 2525M09
- Boring Bars (Internal): S20R-PCLNR09 / S25S-PCLNR09
Steel Grade Selection: NC3030 vs. NC3120
Optimizing your tool life in steel:
Primary choice for general purpose steel turning. Best for unstable machines, interrupted cuts, and rougher surfaces.
Best for continuous high-speed finishing where surface brightness and high wear resistance are the main goals.
Machinist's Tip: When machining steel with mill scale or "crust," the NC3030 provides the edge toughness needed to penetrate the surface without micro-chipping.
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.