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.
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