Korloy VCMT160404-HMP NC3030 (ANSI VCMT 331-HMP) Tough CVD Insert for Interrupted Steel Cutting (10pcs)
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The Original Korloy VCMT160404-HMP NC3030 (ANSI Cross Reference: VCMT 331-HMP) is a high-toughness 35° Rhombic Positive Insert engineered for Demanding Steel Turning. While other inserts chip under pressure, the NC3030 Grade is built to withstand mechanical shocks, interrupted cuts, and unstable setups. Combined with the HMP (Harmony Medium-Positive) chipbreaker and a precise 0.4mm radius, it is the premier choice for internal and external profiling of steels with rough surfaces or cross-holes.
Maximum Edge Security: If you are experiencing sudden insert breakage during internal boring or while profiling shafts with keyways, the NC3030 grade provides the extra insurance needed to complete the part without tool failure.
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 | NC3030 (Maximum Toughness CVD) |
| Application | Steel (P25 - P40) - Interrupted Cuts |
Core Performance Benefits:
- Impact-Absorbing Substrate: NC3030 uses a specialized carbide matrix that prevents cracks from propagating, making it ideal for the most difficult interrupted cuts.
- Refined CVD Coating: Provides excellent thermal protection while maintaining a smooth surface to reduce friction and cutting forces.
- Precise Profiling: The 35° geometry combined with a 0.4mm radius allows for intricate contouring and sharp corners, even in tough materials.
- HMP Chipbreaker Stability: Optimized to maintain consistent chip control even when cutting conditions are less than ideal.
Recommended Cutting Parameters:
| Workpiece Condition | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Heavy Interrupted Cut | 100 - 220 m/min | 0.08 - 0.20 mm/rev | 0.5 - 2.0 mm |
| Rough Surface / Forging | 80 - 180 m/min | 0.10 - 0.22 mm/rev | 0.5 - 2.5 mm |
Compatible Tooling Systems:
- External Profiling: SVJCR 2020K16 / SVJCR 2525M16
- Internal Boring Bars: S32T-SVUCR16 / S40U-SVQCR16
NC3020 vs. NC3030: The Choice
Choose for continuous turning on clean bar stock. Prioritizes wear resistance and high surface speeds.
Choose for interrupted cuts or unstable parts. Prioritizes toughness to prevent catastrophic tool failure.
Packaging: 10 pieces per box.
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