Korloy TNMX160404R NC3020 (Right Hand) General Steel Finishing Insert (10pcs)
30-Day Free Returns
Free Worldwide Shipping
The Original Korloy TNMX160404R NC3020 is a highly reliable Right-Hand Triangular Turning Insert designed for Precision Steel Machining (P-Group). Featuring the legendary NC3020 Grade, this insert offers a perfect harmony of wear resistance and edge toughness. The TNMX geometry is engineered to excel in finishing operations, providing low cutting resistance and superior chip evacuation to ensure a flawless surface on your steel components.
The Versatility Champion: Whether you are machining low-carbon mild steel or tough alloy steel, NC3020 provides a stable performance window. It is the "safe bet" for operators who need consistent results across various steel grades without constantly changing tool offsets.
Technical Specifications:
| ISO Designation | TNMX 160404R |
| Hand of Tool | Right Hand (R) |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | NC3020 (Universal Steel Specialist CVD) |
Core Performance Benefits:
- Balanced CVD Coating: Thick Al2O3 layer provides excellent heat insulation and resistance to crater wear.
- Precision Finishing: The 0.4mm radius allows for intricate details and high surface brightness (Ra 0.8 - 1.6).
- Lower Cutting Pressure: The TNMX design "slices" through the material, reducing the risk of vibration on small diameter parts.
- Long-Term Stability: NC3020 substrate is toughened to handle the occasional interrupted cut often found in real-world steel turning.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045/S45C) | 180-350 m/min | 0.08-0.20 mm/rev | 0.2-2.0 mm |
| Alloy Steel (4140/SCM440) | 150-280 m/min | 0.06-0.18 mm/rev | 0.2-1.8 mm |
Compatible Tool Holders:
Fits all standard Right-Hand (R) or Neutral (N) tool holders designed for 16-size inserts:
- External Holders: MTJNR 2020K16 / MTJNR 2525M16 (ANSI 12-4B / 16-4D)
- Boring Bars: S25S-WTJNR16 / S20R-WTJNR16
Machinist Tip: Why choose NC3020 for Finishing?
Optimizing your workflow between NC3020 and NC3120:
Maximum Stability. If you are running multiple steel grades (e.g., switching from 1018 to 4140), NC3020 provides the toughest edge to handle varying hardness without chipping.
Maximum Productivity. Choose NC3120 if you are running mass production on pre-hardened steels at very high RPMs. It offers slightly higher wear resistance but is more brittle than NC3020.
Pro Advice: The TNMX geometry works best when you maintain a feed rate (fn) that is at least 0.1mm/rev to ensure the chipbreaker is fully engaged, preventing long, stringy chips from damaging the finished surface.
Packaging: 10 pieces per box.
TNMX 160404R for precision steel turning, Korloy NC3020 vs NC3120 performance, right hand finishing inserts for 1045 steel, best value CNC inserts for steel, TNMX series precision lathe inserts