Korloy VCMT160404-HMP NC3120 (ANSI VCMT 331-HMP) New Gen CVD Steel Profiling Insert (10pcs)
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The Original Korloy VCMT160404-HMP NC3120 (ANSI Cross Reference: VCMT 331-HMP) is the latest technological standard for High-Performance Steel Profiling. Built on the new NC3120 Grade, this 35° Rhombic Positive Insert offers superior resistance to crater wear and plastic deformation compared to its predecessors. Combined with the HMP (Harmony Medium-Positive) chipbreaker and a sharp 0.4mm radius, it provides unmatched precision for semi-finishing carbon steels, alloy steels, and tool steels.
Next-Gen Performance: NC3120 is designed to broaden your machining window. It offers the high-speed capability of NC3020 but with the enhanced edge security of a much tougher grade, reducing downtime and increasing parts per edge.
Technical Specifications (Metric & ANSI):
| ISO Designation | VCMT 160404-HMP |
| ANSI Designation | VCMT 331-HMP |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | NC3120 (New Era CVD Coated) |
| Target Materials | Steel (P15 - P35) |
Core Performance Benefits:
- Upgraded CVD Nano-Coating: Features advanced Al2O3 layer technology that significantly improves heat dissipation, critical for maintaining the 35° sharp tip during long cycles.
- Exceptional Surface Finish: The R0.4 radius and HMP geometry work together to minimize cutting forces and prevent vibration, resulting in a superior Ra value on complex contours.
- Broad Application Range: NC3120 handles everything from clean continuous cuts to light interrupted machining, making it the most versatile steel grade in your shop.
- V-Bottom Precision: The VCMT geometry ensures rigid seating in the holder, maintaining accuracy even during heavy profiling passes.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon/Mild Steel | 180 - 380 m/min | 0.08 - 0.22 mm/rev | 0.3 - 2.5 mm |
| Alloy Steel (4140/SCM440) | 150 - 320 m/min | 0.06 - 0.20 mm/rev | 0.3 - 2.0 mm |
Compatible Tooling:
- External Profile Tool Holders: SVJCR 2020K16 / SVJCR 2525M16
- Internal Boring Bars: S32T-SVUCR16 / S40U-SVQCR16
The Evolution: NC3120 Advantage
Why machinists are switching from NC3020 to NC3120:
While NC3020 was a speed king, it could be brittle. NC3120 keeps the speed but adds a "cushion" of toughness, making it far more reliable for unattended machining cycles.
New interlayer technology ensures the CVD coating stays bonded to the carbide substrate longer, preventing premature flaking that often ruins fine surface finishes.
Packaging: 10 pieces per box.
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