Korloy VNMG160408-HM NC3120 (ANSI VNMG 332-HM) New Gen CVD Steel Turning Insert (10pcs)
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The Original Korloy VNMG160408-HM NC3120 (ANSI Cross Reference: VNMG 332-HM) represents the next generation of High-Performance Steel Machining. Developed to replace the legendary NC3020, the NC3120 Grade features an advanced CVD nano-coating that offers a superior balance of wear resistance and toughness. Combined with the HM (Harmony Medium) chipbreaker and a robust 0.8mm radius, this insert delivers stable, high-speed performance across carbon and alloy steels.
Technological Evolution: NC3120 provides a wider machining window than its predecessor. It maintains high-speed capability while significantly improving edge security in light interrupted cuts, reducing the risk of sudden chipping.
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 | NC3120 (New Era CVD Coated) |
| Primary Materials | Carbon Steels, Alloy Steels (P15 - P35) |
Core Performance Benefits:
- Advanced CVD Nano-Coating: Features optimized Al2O3 layers for superior heat dissipation, allowing for consistent performance at higher surface speeds.
- Economic 4-Edge Design: The negative VNMG geometry maximizes tool life with four precise cutting edges, lowering your overall cost-per-part.
- Reinforced R0.8 Edge: Provides excellent structural stability for medium-duty turning, enabling higher feed rates than the R0.4 version.
- "Harmony" HM Chipbreaker: Expertly designed to manage chips at depths of cut between 1.0mm and 3.5mm, ensuring a clean work environment and protecting the workpiece.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Medium Carbon Steel | 180 - 380 m/min | 0.12 - 0.32 mm/rev | 0.8 - 3.5 mm |
| Alloy Steel (4140) | 150 - 320 m/min | 0.10 - 0.28 mm/rev | 0.5 - 3.0 mm |
Compatible Tooling:
- External Profile Tool Holders: MVJNR / MVVNN / DVLNR Series (Size 16)
- Internal Boring Bars: S32U-MVQNR16 / S40V-MVUNR16
Upgrade Insight: The NC3120 Edge
NC3120 uses a refined coating adhesion process. This means the coating stays on the carbide longer under extreme heat, preventing the premature crater wear that often ends tool life on alloy steels.
Ideal for automated production. The improved toughness of NC3120 makes it much more predictable than older grades, allowing for longer "unmanned" machining cycles with confidence.
Packaging: 10 pieces per box.
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