Korloy VCMT160408-HMP NC3020 (ANSI VCMT 332-HMP) CVD Carbide Insert for Steel (10pcs)
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The Original Korloy VCMT160408-HMP NC3020 (ANSI Cross Reference: VCMT 332-HMP) is a high-performance 35° Rhombic Positive Insert engineered for Productive Steel Turning. With its reinforced 0.8mm (1/32") Corner Radius and robust 1604 substrate (4.76mm thickness), this insert is designed to handle higher material removal rates while maintaining exceptional edge integrity. The NC3020 CVD Grade provides the wear resistance needed for continuous high-speed operation in carbon and alloy steels.
Built for Strength: The R0.8 corner radius offers significantly higher edge security than the R0.4 version. It is the preferred choice for rough-to-medium profiling where the cutting depth varies or where the material has a slightly harder surface skin.
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 | NC3020 (CVD Coated) |
| Primary Material | Steel (P10 - P30) |
Core Performance Benefits:
- Premium CVD Grade (NC3020): Features a specialized TiCN+Al2O3 multi-layer coating that acts as a thermal barrier, preventing plastic deformation and flank wear.
- HMP Chipbreaker Versatility: The "Harmony Medium-Positive" geometry is optimized for medium-duty cutting, providing reliable chip breaking and reducing tool pressure.
- Reinforced Edge: The 0.8mm radius allows for increased feed rates (up to 0.25 mm/rev), drastically reducing cycle times while maintaining a strong cutting tip.
- Enhanced Stability: The thick 4.76mm base provides excellent resistance to vibration, especially critical in long-reach boring operations.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon / Alloy Steel | 160 - 360 m/min | 0.12 - 0.28 mm/rev | 0.8 - 3.0 mm |
| Hardened Steel (<35HRC) | 120 - 240 m/min | 0.10 - 0.22 mm/rev | 0.5 - 2.0 mm |
Compatible Tooling Systems:
Fits all standard tool holders designed for V-bottom 35° inserts with a 7° relief angle:
- External Profile Tooling: SVJCR 2020K16 / SVJCR 2525M16
- Internal Boring Bars: S32T-SVUCR16 / S40U-SVQCR16
Machinist Tip: Maximizing Tool Life
Why choose the R0.8 (VCMT 332) for steel?
The 0.8mm corner radius allows you to "push" the tool harder. If you are experiencing premature tip wear with an R0.4, switching to the R0.8 provides more carbide mass to dissipate heat, extending the life of each edge.
While R0.8 is tougher, it generates higher radial cutting forces. Ensure your workpiece setup is rigid. For long, slender shafts, monitor for vibration and adjust speed accordingly.
Packaging: 10 pieces per box.
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