Korloy VNMG160408-HM NC3020 (ANSI VNMG 332-HM) Double-Sided CVD Insert for Steel (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy VNMG160408-HM NC3020 (ANSI Cross Reference: VNMG 332-HM) is a heavy-duty 35° Rhombic Negative Insert optimized for High-Productivity Steel Machining. By leveraging the Double-Sided VNMG geometry, this insert provides 4 robust cutting edges, making it one of the most cost-effective profiling solutions on the market. The NC3020 CVD Grade ensures maximum protection against heat and wear, while the HM (Harmony Medium) chipbreaker handles medium-duty cuts with reliable chip evacuation.
Built for Strength: The R0.8 (0.8mm) corner radius provides significantly more carbide mass at the tip compared to R0.4 versions. This reinforcement allows for heavier feed rates and offers higher resistance to chipping, even when encountering slight surface irregularities on steel workpieces.
Technical Specifications (Metric & ANSI):
| ISO Designation | VNMG 160408-HM |
| ANSI Designation | VNMG 332-HM |
| 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 (Premium CVD Coated) |
| Target Material | Steel (P15 - P35) |
Core Performance Benefits:
- Economic 4-Edge Design: The negative rake design utilizes both top and bottom faces, giving you 4 cutting edges per insert, reducing tool inventory costs.
- NC3020 Multi-Layer Coating: Features a specialized TiCN + Al2O3 coating structure that prevents flank wear and cratering during high-speed continuous turning.
- HM "Harmony" Chipbreaker: Optimized for a wide range of medium machining. It provides consistent chip breaking at depths of cut between 1.0mm and 3.5mm.
- High Feed Stability: The R0.8 corner radius allows for faster cycle times (up to 0.35 mm/rev) without risking premature tip failure.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 160 - 360 m/min | 0.12 - 0.32 mm/rev | 0.8 - 3.5 mm |
| Alloy Steel (4140) | 140 - 280 m/min | 0.10 - 0.28 mm/rev | 0.8 - 3.0 mm |
Compatible Tooling:
- External Profile Tool Holders: MVJNR / MVVNN / DVLNR Series (1604)
- Internal Boring Bars: S32U-MVQNR16 / S40V-MVUNR16
Machinist Tip: Why R0.8 over R0.4?
If you are experiencing premature tip wear or the 35° point is breaking during profiling, the R0.8 (VNMG 332) provides the extra strength needed to handle the pressure of alloy steel turning.
The 0.8mm radius can produce a very good finish if you match the feed. Try a feed rate around 0.15-0.20 mm/rev for a clean surface that stays within tolerance.
Packaging: 10 pieces per box.
VNMG 332-HM Korloy NC3020, VNMG160408 steel turning, NC3020 CVD grade performance, double sided 35 degree profiling, VNMG 160408 R0.8 steel, HM chipbreaker range
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.