Korloy TNMX160408R NC3120 (Right Hand) High-Efficiency Alloy Steel Insert (10pcs)
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The Original Korloy TNMX160408R NC3120 is a premium Right-Hand Triangular Turning Insert engineered for High-Efficiency Steel Machining (P-Group). Optimized with the NC3120 Grade, this insert features a robust CVD coating tailored for high-speed, medium-duty operations. The TNMX geometry offers a perfect balance between edge strength and sharp cutting action, making it a favorite for semi-finishing alloy steels where both material removal rate and surface finish are critical.
Maximize Your Cycle Times: NC3120 is designed for high-heat environments. Its specialized TiCN + Al2O3 coating layers provide extreme resistance to crater wear and plastic deformation, ensuring your TNMX160408R maintains dimensional accuracy through long production cycles in 4140 or pre-hardened steels.
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 | NC3120 (Elite High-Efficiency CVD) |
Core Performance Benefits:
- Enhanced Edge Toughness: The 0.8mm radius provides a significantly stronger edge compared to 0.4mm versions, ideal for light interruptions or scale.
- Advanced Thermal Barrier: NC3120 coating prevents heat transfer to the carbide substrate, allowing for higher SFM (Surface Feet per Minute).
- High-Efficiency Chip Breaking: TNMX geometry is optimized to break chips effectively at both shallow and medium depths of cut.
- Superior Wear Resistance: Specifically tuned for abrasive alloy steels that cause rapid tool wear in general-purpose grades.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Alloy Steel (4140, 4340) | 160-310 m/min | 0.15-0.38 mm/rev | 0.5-3.5 mm |
| Carbon Steel (1045) | 200-360 m/min | 0.18-0.45 mm/rev | 1.0-4.0 mm |
Compatible Tooling Systems:
Ensure you use a Right-Hand (R) or Neutral (N) holder designed for 16-size triangular inserts:
- External Holders: MTJNR 2020K16 / MTJNR 2525M16 (ANSI 16-4D)
- Boring Bars: S25S-WTJNR16 / S32T-WTJNR16
Machinist Tip: The Power of 0.8mm & TNMX
Why the TNMX160408R is a workshop workhorse:
NC3120 is harder than the general-purpose NC3020. It thrives at high cutting speeds. If you feel your current inserts are "smearing" or losing the tip too fast in alloy steel, NC3120 is the upgrade you need.
The 0.8mm radius is the most popular choice for a reason. It is robust enough for light roughing but sharp enough (with TNMX geometry) to leave an Ra 1.6 - 3.2 finish effortlessly.
Pro Advice: To maximize the benefits of TNMX, ensure your depth of cut (ap) is at least twice the feed rate (fn). This keeps the chipbreaker engaged and ensures the heat flows into the chip, not the workpiece.
Packaging: 10 pieces per box.
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