Korloy TNMG160404-HS PC5300 (TNMG 331-HS) Universal Precision Turning Insert (10pcs)
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The Original Korloy TNMG160404-HS PC5300 (ANSI: TNMG 331-HS) is the ultimate Universal Turning Insert for modern machine shops. Engineered with the legendary PC5300 PVD Grade, it offers a unique combination of high toughness and oxidation resistance, allowing it to perform across Steel, Stainless Steel, and Cast Iron. The HS (High-Sharpness/Semi-Finish) chipbreaker and 0.4mm radius ensure minimal cutting resistance and excellent dimensional accuracy on delicate parts.
One Insert, Many Materials: Tired of switching inserts between steel and stainless jobs? PC5300 is Korloy's "General Purpose" champion. It features a specialized fine-grained substrate and a smooth PVD coating that prevents chip welding, making it perfect for precision semi-finishing and finishing tasks.
Technical Specifications (Metric & Imperial):
| ISO Designation | TNMG 160404-HS |
| ANSI Designation | TNMG 331-HS |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | PC5300 (Multi-Purpose PVD Coating) |
Core Performance Benefits:
- Ultra-Smooth PVD Coating: Reduces friction and prevents built-up edge (BUE), especially in "gummy" materials like stainless steel.
- HS Chipbreaker Geometry: Designed for low cutting forces. It breaks chips effectively even at very light depths of cut.
- Sub-Micron Substrate: High edge toughness prevents micro-chipping in interrupted cuts or hardened materials.
- Precision Finishing: The 0.4mm (331) radius is the industry standard for achieving mirror-like surface finishes and tight tolerances.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon/Alloy Steel | 150-250 m/min | 0.05-0.20 mm/rev | 0.3-2.5 mm |
| Stainless Steel (304/316) | 100-180 m/min | 0.08-0.18 mm/rev | 0.3-2.0 mm |
| Ductile Cast Iron | 120-200 m/min | 0.10-0.22 mm/rev | 0.5-2.5 mm |
Compatible Tooling Systems:
- Precision External Holders: MTJNR 2020K16 / MTJNR 2525M16 (ANSI 12-4B / 16-4D)
- Precision Boring Bars: S20R-WTJNR16 / S25S-WTJNR16
Machinist Tip: The PC5300 Advantage
When to use PC5300 vs PC9030:
Best for Versatility. If you switch between steel, stainless, and iron frequently, or if you are running small batches, PC5300 is the best "all-around" performer. It is significantly tougher than standard CVD steel grades.
Best for 100% Stainless. If you are ONLY machining 304/316 stainless steel all day, PC9030 will offer slightly better chemical resistance against built-up edge. But for everything else, PC5300 is the king of general shops.
Pro Advice: The HS chipbreaker is very sharp. Avoid extremely deep roughing cuts (over 3mm) as this might overload the edge. Use HS for what it's best at: Precision, Surface Finish, and Tolerance control.
Packaging: 10 pieces per box.
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