Korloy VCMT160408-HMP NC3120 (ANSI VCMT 332-HMP) Upgraded CVD Steel Turning Insert (10pcs)
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The Original Korloy VCMT160408-HMP NC3120 (ANSI Cross Reference: VCMT 332-HMP) is the industry's new benchmark for Efficient Steel Profiling. As the successor to the NC3020, the NC3120 Grade features an upgraded CVD coating and a specialized substrate designed to handle higher temperatures and mechanical loads. The robust 0.8mm (1/32") radius allows for increased feed rates and improved edge security, making it perfect for semi-finishing and medium turning of carbon, alloy, and tool steels.
The Professional Choice: By upgrading to NC3120, users experience a significant reduction in flank wear and chipping. The 160408 configuration provides the extra mass needed to dampen vibrations in long-reach internal boring operations.
Technical Specifications (Metric & ANSI):
| ISO Designation | VCMT 160408-HMP |
| ANSI Designation | VCMT 332-HMP |
| 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 Generation CVD) |
| Target Materials | Steel (P15 - P35) |
Core Performance Benefits:
- Optimized CVD Nanotechnology: NC3120’s refined multi-layer coating provides superior heat insulation, extending the life of the 35° sharp geometry during high-speed cuts.
- Reinforced R0.8 Edge: The 0.8mm radius offers much better resistance to mechanical shock and heat concentration than the 0.4mm version, enabling higher feed rates (up to 0.28 mm/rev).
- HMP Chipbreaker Versatility: "Harmony Medium-Positive" geometry excels in controlling chips across varying depths of cut, preventing scratches on the workpiece surface.
- Predictable Stability: The thick 4.76mm base and V-bottom design ensure rigid clamping, essential for maintaining tight tolerances in precision profiling.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 180 - 360 m/min | 0.12 - 0.28 mm/rev | 0.5 - 3.5 mm |
| Alloy Steel (4140) | 150 - 300 m/min | 0.10 - 0.25 mm/rev | 0.5 - 3.0 mm |
Compatible Internal Boring Bars:
- S32T-SVUCR16: 32mm Diameter Steel Shank, 93° Lead Angle (Right-hand).
- S40U-SVQCR16: 40mm Diameter Steel Shank, 107.5° Lead Angle (Right-hand).
Why Upgrade to NC3120?
The evolution from NC3020 to NC3120:
NC3120 is designed to be more "forgiving." It handles slightly harder materials and minor surface scale better than the older NC3020, making it a more universal grade for your shop.
The combination of the NC3120's high speed capability and the 0.8mm radius's high feed capacity allows you to push for maximum productivity without sacrificing tool life.
Packaging: 10 pieces per box.
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