Korloy VNMG160408-HM NC3030 (ANSI VNMG 332-HM) Impact-Resistant CVD Steel Insert (10pcs)
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The Original Korloy VNMG160408-HM NC3030 (ANSI Cross Reference: VNMG 332-HM) is a high-toughness 35° Rhombic Negative Insert specifically engineered for Heavily Interrupted Steel Machining. Featuring the robust NC3030 CVD Grade, this insert excels in environments where mechanical shock and thermal cycling typically cause edge failure. With 4 usable cutting edges and a reinforced 0.8mm radius, it provides the perfect balance of economic value and extreme reliability in harsh turning conditions.
Maximum Edge Security: NC3030 is Korloy's premier "tough" grade. Choose this over NC3020/NC3120 when your part has cross-holes, keyways, or a raw forging skin that requires the insert to survive repeated heavy impacts.
Technical Specifications (Metric & ANSI):
| ISO Designation | VNMG 160408-HM |
| ANSI Designation | VNMG 332-HM |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.8 mm / (1/32") |
| Grade | NC3030 (Max Toughness CVD) |
| Target Condition | Interrupted Cuts / Rough Surfaces |
Core Performance Benefits:
- Extreme Shock Resistance: The NC3030 substrate is composed of a specialized carbide matrix that prevents micro-cracks from turning into catastrophic failures during interrupted cuts.
- Reinforced R0.8 Edge: The 0.8mm radius provides significantly more structural support than an R0.4, allowing for higher feed rates in challenging profiling tasks.
- HM "Harmony" Chipbreaker: Optimizes chip flow for medium-duty cutting, reducing heat concentration at the tip and preventing chip nesting.
- Premium Multi-Layer CVD: A thick TiCN + Al2O3 coating offers excellent wear resistance while serving as a thermal barrier.
Recommended Cutting Parameters:
| Workpiece Condition | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Heavy Interruption | 100 - 220 m/min | 0.12 - 0.30 mm/rev | 0.8 - 3.5 mm |
| Rough Forged Surface | 80 - 180 m/min | 0.10 - 0.28 mm/rev | 1.0 - 4.0 mm |
Compatible Tooling Systems:
- External Turning Holders: MVJNR / MVVNN / DVLNR Series (Size 16)
- Internal Boring Bars: S32U-MVQNR16 / S40V-MVUNR16
Why Choose NC3030 over NC3020?
Ideal for continuous cuts on clean bar stock. Prioritizes wear resistance at high speeds.
Ideal for broken cuts and scaly parts. Prioritizes toughness to prevent chipping.
Packaging: 10 pieces per box.
VNMG 332-HM Korloy NC3030, VNMG160408 for interrupted steel cutting, Korloy NC3030 vs NC3120 toughness, interrupted profiling inserts for shafts, best insert for scaly carbon steel
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.