Korloy VCMT160404-HMP NC3020 (ANSI VCMT 331-HMP) CVD Carbide Insert for Steel (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy VCMT160404-HMP NC3020 (ANSI Cross Reference: VCMT 331-HMP) is a high-rigidity 35° Rhombic Positive Insert engineered for Precision Steel Machining. Designed for stability in profiling and semi-finishing, the 1604 series (4.76mm thickness) minimizes vibration during long-reach operations. The NC3020 CVD Coating ensures the tool maintains a sharp, wear-resistant edge during high-speed production of carbon and alloy steels.
Rigid Profiling Specialist: The VCMT 1604 series provides the critical mass and thickness needed to prevent plastic deformation, making it superior to thinner inserts for high-precision contouring on steel workpieces.
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 | NC3020 (CVD Coated) |
| Application | Steel (P10 - P30) |
Core Performance Benefits:
- Optimized CVD Coating (NC3020): Features a multi-layered TiCN+Al2O3 structure for excellent heat resistance and long tool life in dry or wet cutting conditions.
- HMP Chipbreaker: Specifically designed for "Harmony Medium-Positive" performance, controlling chips effectively at feed rates common in semi-finishing.
- Superior Stability: The 4.76mm thickness allows for higher clamping force and reduces chatter during internal boring operations.
- Enhanced Precision: The V-bottom geometry ensures accurate indexing and repeatability, which is critical for maintaining tight tolerances.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel / Alloy Steel | 150 - 350 m/min | 0.08 - 0.22 mm/rev | 0.5 - 2.5 mm |
| Pre-hardened Steel | 100 - 220 m/min | 0.06 - 0.18 mm/rev | 0.3 - 1.5 mm |
Compatible Tooling Systems:
Commonly used in 7° relief angle tool holders, including:
- External Turning: SVJCR / SVVCN / SVHCR Series (Ensure holder is for 16-size)
- Internal Boring Bars: S32T-SVUCR16 / S40U-SVQCR16
Machinist Tip: VCMT vs. VBMT
Understanding the subtle difference:
VCMT inserts (like this 160404) are often used in tool holders that require a slightly different seating and clamping style than VBMT. They are highly favored for internal boring operations where chip evacuation and clearance are tighter.
With the 0.4mm (R0.4) radius, you get a much finer finish. To avoid work-hardening, ensure your feed is at least 0.1mm/rev to stay engaged with the material.
Packaging: 10 pieces per box.
VCMT 331-HMP Korloy NC3020, VCMT160404 for steel machining, NC3020 CVD grade technical data, HMP chipbreaker precision turning, VCMT inserts for SVUCR boring bars
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.