Korloy TNMG160408-HA NC3020 (TNMG 332-HA) Steel Turning Insert (10pcs)
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The Original Korloy TNMG160408-HA NC3020 (ANSI: TNMG 332-HA) is a high-performance Double-Sided Triangular Insert optimized for General Steel Turning (P-Group). Utilizing the robust NC3020 CVD Coating, this insert is designed to withstand high-speed continuous cutting in carbon and alloy steels. The HA Geometry provides an exceptionally sharp cutting action, making it the ideal choice for reducing power consumption and preventing vibration on smaller or less rigid CNC lathes.
Efficiency Meets Sharpness: While most steel inserts feature blunt, heavy-duty edges, the HA geometry on the NC3020 grade allows for a "slicing" effect. This is particularly effective for Low Carbon Steels (A3, 1018, 1020) where preventing built-up edge and maintaining a bright surface finish is critical.
Technical Specifications (Metric & Imperial):
| ISO Designation | TNMG 160408-HA |
| ANSI Designation | TNMG 332-HA |
| 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 for Steel) |
Core Performance Benefits:
- Wear-Resistant CVD Coating: Thick Al2O3 coating layer provides superior heat insulation and crater wear resistance during high-speed turning.
- Sharp HA Geometry: Reduces chip thickness and cutting temperature, extending tool life in gummy low-carbon steels.
- Reinforced R0.8 Edge: The 0.8mm radius (332) offers the necessary strength for interrupted cuts and medium-duty roughing.
- 6 Cutting Edges: Maximizes economic value with three edges on each side of the triangular insert.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (1018/1020) | 200-350 m/min (650-1150 sfm) | 0.15-0.45 mm/rev (.006-.018 ipr) | 0.5-4.0 mm (.020-.157") |
| Alloy Steel (4140/4340) | 150-280 m/min (490-920 sfm) | 0.12-0.35 mm/rev (.005-.014 ipr) | 0.5-3.0 mm (.020-.118") |
Compatible Tooling Systems:
- External Toolholders: MTJNR 2020K16 / MTJNR 2525M16 (ANSI 12-4B / 16-4D)
- Boring Bars: S25S-WTJNR16 / S32T-WTJNR16
Machinist Tip: NC3020 vs PC9030
Matching the grade to your workpiece:
Best for Speed. CVD coatings are thicker and harder than PVD. If you are machining standard steel at high RPMs, NC3020 will last significantly longer due to its superior resistance to heat and friction.
Best for Toughness. If you switch to Stainless Steel, NC3020 may fail due to chemical adhesion. Switch to PC9030 for M-Group materials to prevent the edge from chipping.
Pro Advice: The HA geometry is very sharp for a steel-cutting insert. It is excellent for "chatter-prone" setups. However, if you are performing very heavy, interrupted roughing on hard scale, consider switching to the HM or GR geometry for maximum edge strength.
Packaging: 10 pieces per box.
TNMG 160408-HA for mild steel, Korloy NC3020 grade properties, best carbide inserts for 1018 steel, TNMG 332-HA cutting speeds and feeds, low cutting force inserts for steel CNC
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.