Korloy VBMT160408-HMP NC3030 (ANSI VBMT 332-HMP) Tough CVD Insert for Interrupted Steel Cuts (10pcs)
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The Original Korloy VBMT160408-HMP NC3030 (ANSI Cross Reference: VBMT 332-HMP) is a high-performance 35° Rhombic Positive Insert engineered for Demanding & Interrupted Steel Cutting. While the NC3020 is designed for continuous speed, the NC3030 Grade is the "tough brother" built to survive impacts, vibration, and unstable setups. Combined with the HMP (Harmony Medium-Positive) chipbreaker and a robust 0.8mm radius, this insert excels in turning carbon and alloy steels under harsh conditions.
Built for the Tough Jobs: If your inserts are chipping due to interrupted cuts (keyways, holes) or rough surface scales, NC3030 is the solution. It prioritizes substrate toughness to prevent catastrophic tool failure where other grades shatter.
Technical Specifications (Metric & ANSI):
| ISO Designation | VBMT 160408-HMP |
| ANSI Designation | VBMT 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 | NC3030 (Tough CVD Coated) |
| Application | Steel (P25-P40) - Interrupted Cuts |
Core Performance Benefits:
- Maximum Impact Resistance: NC3030 utilizes a specialized substrate that absorbs mechanical shock, making it the top choice for heavy interruptions.
- Thermal Crack Protection: The CVD coating is optimized to resist thermal fatigue, a common issue in wet-dry alternating cutting cycles.
- Stable HMP Chip Control: Effectively breaks chips even in low-rigidity environments, reducing the risk of chip-related tool damage.
- Extended R0.8 Tool Life: The larger radius provides a massive amount of support behind the cutting edge, perfect for scaly forged parts.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (Interrupted) | 120 - 250 m/min | 0.12 - 0.28 mm/rev | 0.5 - 2.5 mm |
| Forged Steel / Crusty Surface | 100 - 200 m/min | 0.15 - 0.30 mm/rev | 0.8 - 3.0 mm |
Universal Holder Compatibility:
- External Shapers: SVJBR 2020K16 / SVJBR 2525M16
- Large Boring Bars: S32T-SVUBC16 / S40U-SVQBC16
NC3020 vs. NC3030: Which one?
Best for Continuous Turning and high speeds. Maximum wear resistance on clean, smooth surfaces.
Best for Heavy Interruption and rough cast/forged surfaces. High impact resistance to prevent breakage.
Pro Advice: If you are unsure about the stability of your setup, start with NC3030. It is much more forgiving than NC3020.
Packaging: 10 pieces per box.
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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.