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.
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