Korloy VBMT160408-HMP NC3120 (ANSI VBMT 332-HMP) Upgraded CVD Steel Turning Insert (10pcs)
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The Original Korloy VBMT160408-HMP NC3120 (ANSI Cross Reference: VBMT 332-HMP) is a high-performance 35° Rhombic Positive Insert engineered for Optimized Steel Machining. Featuring the latest NC3120 Grade, it offers a significant upgrade over the classic NC3020 by improving coating adhesion and substrate toughness. The robust 0.8mm (1/32") radius allows for higher feed rates and increased productivity in semi-finishing and medium cutting of carbon and alloy steels.
The Performance Edge: The NC3120 series provides a wider "sweet spot" for machining. It maintains high wear resistance during continuous cuts while offering the toughness needed to handle slight interruptions and varying surface conditions without chipping.
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 | NC3120 (New Era CVD) |
| Workpiece Material | Steel (P15 - P35) |
Core Performance Benefits:
- Advanced CVD Nanotechnology: NC3120’s refined multi-layer coating provides superior thermal protection and prevents crater wear during high-speed operation.
- Stronger R0.8 Edge: The 0.8mm radius offers much better resistance to mechanical shock and heat concentration than the 0.4mm version, enabling more aggressive cutting.
- HMP Harmony Chipbreaker: Excellent chip breaking across a wide range of feed rates, specifically designed to reduce radial cutting forces and prevent vibration.
- Predictable Tool Life: The upgraded substrate and coating combination ensures consistent performance, part after part.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045/S45C) | 160 - 350 m/min | 0.12 - 0.28 mm/rev | 0.5 - 3.5 mm |
| Alloy Steel (4140/SCM440) | 140 - 280 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
Tool Holder Compatibility:
Precision-matched for VBMT 1604 tool holders:
- External Shapers: SVJBR 2525M16 / SVVBN 2020K16
- Internal Boring Bars: S32T-SVUBR16 / S40U-SVQBR16
Machinist Tip: Efficiency & Surface Finish
Why choosing the R0.8 (VBMT 332) pays off:
With the R0.8 radius and NC3120 grade, you can often push feed rates significantly higher than with an R0.4, directly cutting down your machining time per part while maintaining a robust edge.
The larger radius creates a better "wiper effect" at higher feed rates compared to an R0.4. If you need a clean finish but don't want to crawl at low feed speeds, the 160408 is your best candidate.
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.