Korloy TNMX160408L NC3020 (Left Hand) General Purpose Steel Turning Insert (10pcs)
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The Original Korloy TNMX160408L NC3020 is a highly versatile Left-Hand Triangular Turning Insert designed for General Purpose Steel Machining (P-Group). Utilizing the industry-standard NC3020 Grade, this insert provides an exceptional balance of wear resistance and impact toughness. The TNMX geometry is specifically engineered to improve chip breaking and reduce cutting resistance, making it ideal for semi-finishing and light roughing of carbon and alloy steels.
The Industry Standard for Steel: NC3020 is Korloy’s most popular CVD grade for a reason. It features a multi-layered coating that handles a wide range of cutting speeds and material hardness, making it the "set-and-forget" solution for daily steel turning tasks.
Technical Specifications (Metric & Imperial):
| ISO Designation | TNMX 160408L |
| Hand of Tool | Left Hand (L) |
| 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 (Universal Steel Specialist CVD) |
Core Performance Benefits:
- Universal Application: Excels in everything from soft low-carbon steels to tougher alloy steels.
- Robust 0.8mm Radius: Offers excellent edge strength for varied depths of cut and moderate feed rates.
- Superior Chip Evacuation: The TNMX design creates smaller, manageable chips, preventing tool damage and surface scratching.
- Thermal Stability: The Al2O3 CVD coating layer provides a strong shield against heat, even during dry machining.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 150-320 m/min | 0.15-0.40 mm/rev | 0.5-3.5 mm |
| Alloy Steel (4140) | 130-280 m/min | 0.12-0.35 mm/rev | 0.5-3.0 mm |
Compatible Tooling Systems:
Ensure use with Left-Hand (L) or Neutral (N) tool holders designed for 16-size inserts:
- External Holders: MTJNL 2020K16 / MTJNL 2525M16
- Boring Bars: S25S-WTJNL16 / S32T-WTJNL16
Machinist Tip: Choosing the Right Steel Grade
Korloy NC3020 vs. NC3120:
Maximum Stability. If you don't know the exact hardness of the steel or have a mix of materials, NC3020 is the best choice. It is tougher and more forgiving of machine vibration or unstable setups.
Maximum Wear Resistance. Switch to NC3120 only if you are cutting at very high speeds or dealing with pre-hardened alloy steels where the NC3020 is wearing out too quickly.
Pro Advice: For left-hand (L) inserts, always verify your CNC program's spindle rotation. Using an "L" insert on a standard "R" setup without reversing rotation will result in immediate tool failure.
Packaging: 10 pieces per box.
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