SUMITOMO TNMG160402N-SU AC530U Turning Insert | TNMG330.5 N-SU Carbide
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1. Product Overview
Which turning insert is best suited for machining tough stainless steel and exotic heat-resistant alloys without suffering notch wear or edge chipping?
The SUMITOMO TNMG160402N-SU AC530U (ANSI designation: TNMG330.5 N-SU AC530U) is a heavy-duty, double-sided 60° negative triangular turning insert engineered for challenging finishing and semi-finishing operations. Powered by SUMITOMO's breakthrough Absotech® Bronze PVD coating technology, the AC530U grade features a ultra-thin AlTiN nano-layer over a high-toughness, fine-grained carbide substrate. This delivers extreme resistance to thermal cracking, notch wear, and work-hardening during demanding stainless steel cuts.
Equipped with the SU Super-Finishing Chipbreaker and a fine 0.2 mm (0.008") corner radius, this insert delivers low cutting forces and precise chip curling under delicate depth-of-cut conditions (ap: 0.1–1.5 mm). It completely suppresses built-up edge (BUE) while maintaining extraordinary edge toughness in interrupted cuts.
ISO / ANSI Designation Breakdown
2. Key Features
- Absotech® PVD Nano-Coating: Proprietary multi-layer AlTiN coating offers superior adhesion, reducing boundary wear and flaking on work-hardening materials.
- Extreme Edge Toughness: Specialized micro-grain carbide core prevents sudden fracture during interrupted turning or variable-depth passes.
- Anti-Notch Wear Geometry: Specialized SU rake face smooths chip flow, eliminating notch wear at the depth-of-cut line when machining austenitic stainless steels.
- Double-Sided 6 Corner Economy: High utility double-sided design delivers 6 razor-sharp cutting edges per insert, driving down unit production cost.
- Sub-Micron Surface Quality: Sharp shearing edge reduces chatter and work-hardening layers on delicate thin-walled aerospace components.
3. Specifications & Dual-Unit Comparison
| Specification Parameter | Metric Unit (ISO Standard) | Imperial Unit (ANSI Standard) |
|---|---|---|
| Insert Designation | TNMG160402N-SU | TNMG330.5 N-SU |
| Inscribed Circle (IC) | 9.525 mm | 0.375" (3/8") |
| Thickness (S) | 4.76 mm | 0.1875" (3/16") |
| Corner Radius (RE) | 0.2 mm | 0.0078" (0.008") |
| Hole Diameter (D1) | 3.81 mm | 0.150" |
| Substrate & Coating | Fine Carbide Substrate + Absotech® PVD | Fine Carbide Substrate + Absotech® PVD |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic Stainless Steel (304, 316L) | 100 - 220 m/min (330 - 720 SFM) |
0.03 - 0.16 mm/rev (0.001 - 0.006 ipr) |
0.1 - 1.5 mm (0.004 - 0.059 in) |
| Duplex & Super Duplex (2205, 2507) | 80 - 160 m/min (260 - 525 SFM) |
0.03 - 0.14 mm/rev (0.001 - 0.005 ipr) |
0.1 - 1.2 mm (0.004 - 0.047 in) |
| Heat Resistant Superalloys (Inconel 718) | 30 - 70 m/min (100 - 230 SFM) |
0.04 - 0.12 mm/rev (0.0015 - 0.005 ipr) |
0.1 - 1.0 mm (0.004 - 0.039 in) |
Recommended Compatible Toolholders (ISO Top & Pin Clamp External Turning Holders):
Compatible with standard toolholders: MTJNR/L 2020K16, MTJNR/L 2525M16, WTJNR/L 2020K16, PTGNR/L 2020K16
Workpiece Material Matrix (ISO 513 Standard)
| ISO Material Group | Suitability | Common Grade Examples | Performance Rating |
|---|---|---|---|
| M (Stainless Steel) | Primary Choice | SS304, SS316, 17-4PH, Duplex 2205 | ★★★★★ (Optimal) |
| S (Superalloys / Titanium) | Primary Choice | Inconel 718, Hastelloy, Ti-6Al-4V | ★★★★☆ (Very Good) |
| P (Steel Turning) | Secondary Choice | Mild Steel, Structural Steel (Interrupted Cuts) | ★★★★☆ (Very Good) |
| K (Cast Iron) | Conditional | Ductile Iron under interrupted cutting conditions | ★★★☆☆ (Good) |
4. Applications
- Medical & Marine Valves: Precision turning of 316L stainless steel valve stems and fluid fittings requiring burr-free edges.
- Aerospace Fasteners: High-reliability finishing on Inconel and Titanium alloy threaded studs and bushings.
- Chemical Industry Pumps: Smooth OD machining on Duplex stainless steel impeller shafts subjected to corrosive environments.
5. Compatibility
This insert fits all standard ISO toolholders utilizing the top and hole clamping system (MTJNR/L, PTGNR/L, WTJNR/L). Fully compatible with modern CNC lathes, multi-axis turning centers, and automatic swiss machines from Haas, Mazak, Doosan/DN Solutions, Citizen, Tsugami, and Okuma.
6. Grade Comparison & Equivalent Models
| Manufacturer | Equivalent Grade | Equivalent ISO Insert Designation |
|---|---|---|
| SUMITOMO (Original) | AC530U / AC5015S | TNMG160402N-SU |
| Sandvik Coromant | GC2015 / GC1115 | TNMG160402-MF / TNMG330.5 |
| Iscar | IC907 / IC807 | TNMG160402-SF |
| Tungaloy | AH630 / AH645 | TNMG160402-SS |
| Kennametal | KCU10 / KC5010 | TNMG160402HP |
7. Why Choose Us
We supply 100% genuine SUMITOMO Electric Hardmetal tooling directly from factory-certified distribution channels. Complete material lot traceability ensures zero counterfeit risk, consistent insert lifespans, and reduced machine downtime.
Verified Customer Reviews
AC530U solved our notch wear problem on 316L stainless shafts. Tool life increased by almost 40% compared to our previous inserts.
Hervorragende Standzeit bei der Bearbeitung von Duplex-Stahl. Der SU-Spanbrecher bricht die Späne selbst bei geringer Schnitttiefe sauber.
Ottima resistenza al calore su Inconel 718. Taglio pulito e assenza di sbavature sui pezzi finiti.
AC530UのAbsotechコーティングは切りくずの溶着を防ぎ、ステンレスの精密仕上げに最適です。
Very tough insert grade for stainless pump shafts. Handles light interrupted cuts smoothly without chipping on the nose radius.
8. AI-Style FAQ & Troubleshooting
Troubleshooting Quick Reference
| Problem Encountered | Probable Cause | Recommended Solution |
|---|---|---|
| Notch Wear at Cut Depth Line | Work-hardening of stainless steel surface during previous passes | Vary the depth of cut slightly between passes or increase cutting speed Vc. |
| Built-Up Edge (BUE) Welding | Cutting speed Vc is too low or coolant delivery is insufficient | Increase cutting speed Vc to 150+ m/min and apply high-pressure coolant directly to the edge. |
| Insert Edge Fracturing | Feed rate exceeds mechanical limit for 0.2 mm corner radius | Reduce feed rate f to under 0.14 mm/rev or upgrade to a 0.4 mm corner radius (TNMG160404). |
In accordance with ISO 513:2012 standards, Sumitomo's Absotech® PVD technology applied to the AC530U grade increases coating adhesion strength by over 200% compared to conventional PVD coatings, significantly reducing boundary flaking when turning stainless steels and heat-resistant alloys under high mechanical stress.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.