Korloy TNMX160408R NC3030 (Right Hand) Tough Semi-Finishing Insert for Interrupted Cuts (10pcs)
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The Original Korloy TNMX160408R NC3030 is a heavy-duty Right-Hand Triangular Turning Insert specifically engineered for High-Impact Steel Machining (P-Group). Utilizing the ultra-tough NC3030 Grade, this insert excels where others fail: heavy interrupted cuts, scaly surfaces, and unstable machine setups. The TNMX geometry coupled with a robust 0.8mm radius provides the ultimate structural integrity for the cutting edge, ensuring reliable performance in the most demanding environments.
The Impact Specialist: NC3030 features a thick, multi-layered CVD coating and a specialized substrate designed to arrest crack propagation. If your inserts are chipping due to cross-holes, keyways, or uneven surfaces, the TNMX160408R NC3030 is your go-to reliability specialist.
Technical Specifications (Metric & Imperial):
| ISO Designation | TNMX 160408R |
| Hand of Tool | Right Hand (R) |
| 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 (Maximum Toughness Steel Specialist) |
Core Performance Benefits:
- Maximum Edge Reliability: Engineered to withstand severe mechanical shocks without catastrophic chipping.
- Enhanced Structural Strength: The 0.8mm radius offers a wide, strong contact zone for medium-depth cuts.
- High Heat Insulation: The CVD Al2O3 coating layer protects the substrate from the thermal spikes found in dry machining.
- Active Chip Control: TNMX geometry ensures chips are broken quickly, even in gummy low-carbon steels.
Recommended Cutting Parameters:
| Material & Condition | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Steel (Heavy Interrupted) | 110-220 m/min | 0.15-0.40 mm/rev | 0.5-3.5 mm |
| Rough Cast Steel Skin | 90-180 m/min | 0.18-0.35 mm/rev | 1.0-4.0 mm |
Compatible Tooling Systems:
Fits all standard Right-Hand (R) or Neutral (N) tool holders designed for 16-size inserts:
- Heavy Duty External Holders: MTJNR 2020K16 / MTJNR 2525M16 (ANSI 16-4D)
- Large Diameter Boring Bars: S32T-WTJNR16 / S40U-WTJNR16
Machinist Tip: Why Toughness (NC3030) Matters
When to upgrade from NC3020 to NC3030:
Maximum Shock Resistance. Ideal for old machines with play in the spindle, or when machining non-round bars. It stays intact where harder grades like NC3120 would shatter.
Best for Stability. Use NC3020 for clean, continuous turning at higher speeds. It is more wear-resistant than NC3030 but less durable against impact.
Pro Advice: If you are machining hexagonal or square bars, reduce your cutting speed (Vc) by 20% compared to round bars to allow the NC3030 grade to absorb the cyclic impacts effectively.
Packaging: 10 pieces per box.
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