Sumitomo TNMG160404N-SU AC530U Carbide Insert (TNMG 331-SU)
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Sumitomo TNMG160404N-SU AC530U Carbide Insert | ISO TNMG 160404-SU (ANSI TNMG 331-SU)
1. Product Overview
Which turning insert is best for low cutting resistance, preventing notch wear, and turning stainless steel or heat-resistant superalloys?
The Sumitomo TNMG160404N-SU AC530U (ANSI Designation: TNMG 331-SU) is a double-sided 60° triangular indexable turning insert engineered specifically for high-efficiency turning of ISO M (stainless steel) and ISO S (heat-resistant superalloys). Featuring Sumitomo’s proprietary AC530U PVD Coating Grade, it combines a high-toughness carbide substrate with a high-adhesion PVD TiAlN ultra-multi-layer Absotech® coating to prevent micro-chipping, notch wear, and built-up edge (BUE) under severe machining strain.
Paired with the SU Low Resistance / Light Cutting Chipbreaker, this insert incorporates an optimized rake face gradient and high inclination angle. It dramatically lowers cutting forces, accelerates heat dissipation from the cutting zone, and provides superb chip control on gummy materials such as 304/316 austenitic stainless steel, duplex stainless steel, and Inconel alloys at shallow depths of cut (ap: 0.3mm – 2.5mm).
2. Product Key Features
- 6 Double-Sided Cutting Edges: Negative 60° geometry offers 6 usable cutting corners, maximizing tooling cost efficiency per edge.
- PVD Absotech® AC530U Grade: Extreme edge toughness and thermal shock resistance, ideal for light interruptions, wet turning, and stainless steel work-hardening tendencies.
- SU Low-Force Chipbreaker: High-rake sharp shearing angle minimizes cutting pressure, workpiece deflection, and surface chatter on thin-walled components.
- Exceptional Notch Wear Resistance: Prevents premature failure at the depth-of-cut line when turning work-hardening austenitic stainless steels.
- Dual ISO / ANSI Standard Compliance: Fully interchangeable across all standard ISO 1832 and ANSI B212.4 toolholders.
ISO / ANSI Code Nomenclature Breakdown
Detailed geometric interpretation of the TNMG160404N-SU specification standard:
3. Technical Parameters & Metric vs Imperial Comparison
| Specification Parameter | Metric Value (ISO Designation) | Imperial Value (ANSI Designation) |
|---|---|---|
| Product Model Code | TNMG160404N-SU AC530U | TNMG 331-SU AC530U |
| Inscribed Circle (i.C.) | 10.0 mm | 0.375" (3/8") |
| Thickness (S) | 4.76 mm | 0.1875" (3/16") |
| Corner Radius (re) | 0.4 mm | 0.0156" (1/64") |
| Fixing Hole Diameter (d1) | 3.81 mm | 0.150" |
| Insert Substrate Grade | Sumitomo AC530U (PVD TiAlN Absotech®) | Sumitomo AC530U (PVD TiAlN Absotech®) |
Recommended Speeds & Feeds (Cutting Parameters)
| Workpiece Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| ISO M: Austenitic Stainless (304 / 316L) | 120 - 240 m/min (390 - 785 SFM) |
0.08 - 0.25 mm/rev (0.003 - 0.010 IPR) |
0.3 - 2.5 mm (0.012 - 0.098 in) |
| ISO M: Duplex Stainless (2205 / 2507) | 90 - 180 m/min (295 - 590 SFM) |
0.08 - 0.20 mm/rev (0.003 - 0.008 IPR) |
0.3 - 2.0 mm (0.012 - 0.079 in) |
| ISO S: Superalloys (Inconel 718 / Titanium) | 35 - 80 m/min (115 - 260 SFM) |
0.06 - 0.18 mm/rev (0.002 - 0.007 IPR) |
0.3 - 1.8 mm (0.012 - 0.071 in) |
Fits all standard ISO turning toolholders with a 60° negative pocket design:
MTJNR / MTJNL 2020K16 Holder MTJNR / MTJNL 2525M16 Holder WTJNR / WTJNL 2020K16 Holder DTJNR / DTJNL 2525M16 Holder Boring Bar: S25S-MTJNR164. Applications & Industrial Operations
- Medical & Food-Grade Components: Precision turned 316L stainless steel fittings, valve bodies, and pump shafts requiring Ra < 1.6 μm fine surface finishes.
- Aerospace & Chemical Processing: Turning nickel-based alloys and titanium shafts with reduced cutting forces and zero work-hardening layer creation.
- Thin-Walled Tubing & Long Shafts: Low-resistance shearing action prevents component chatter and dimensional tapering on flexible workpieces.
5. Compatibility & Machine Integration
Seamlessly compatible with all CNC lathes, turning centers, multi-tasking machines, and Swiss-type automatics. Direct drop-in replacement for standard ISO TNMG160404 / ANSI TNMG 331 turning pockets from Sandvik Coromant, Kennametal, Iscar, Kyocera, Tungaloy, Walter, and Seco.
6. Grade Comparison & Equivalent Models Matrix
| Brand | Equivalent Grade | Equivalent Chipbreaker | ISO Material Application |
|---|---|---|---|
| Sumitomo Electric | AC530U | SU | ISO M15-M35 / S15-S30 |
| Sandvik Coromant | GC2015 / GC1115 | MF / MM | ISO M15-M30 |
| Kennametal | KCU10 / KC5010 | MS / FS | ISO M15-M30 |
| Iscar | IC907 / IC908 | SF / SM | ISO M15-M35 |
| Kyocera | PR1125 / PR1225 | MS / MQ | ISO M15-M30 |
7. Why Choose Us?
- 100% Genuine Sumitomo Guarantee: Factory-direct sourcing ensures authentic AC530U inserts with verified lot numbers and batch performance consistency.
- Technical Machining Support: Technical support from experienced CNC tooling specialists ready to assist with speeds and feeds calculation.
- Rapid International Shipping: Sealed industrial 10-piece box packaging ready for immediate worldwide dispatch.
Verified Customer Reviews
Unbeatable on 316L stainless steel pumps
"We had major notch wear issues at the depth of cut line on 316L forgings using our old brand. switched to Sumitomo AC530U and doubled our tool life instantly. SU chipbreaker controls long stringy chips perfectly."
— Dave K., CNC Machine Shop Owner (United States 🇺🇸)Hervorragende Standzeit bei V4A Edelstahl
"Sehr gute Spanbrechung und lange Standzeit bei der Bearbeitung von Edelstahl. Kein Ausbröckeln der Schneidkante mehr."
— Thomas B., Fertigungsleiter (Germany 🇩🇪)Eccellente su acciaio inox e titanio
"Finitura superficiale fantastica. L'inserto lavora benissimo e non genera vibrazioni sui pezzi sottili."
— Luca M., Officina Meccanica (Italy 🇮🇹)SUS304加工で切りくずが綺麗に分断される
"粘り強いステンレス材料の加工でもノッチ磨耗が発生しにくく、SUブレーカのおかげで切削抵抗が非常に低いです。"
— Kenji S., Precision Tooling Engineer (Japan 🇯🇵)Great for Inconel light finishing passes
"Consistently holds tight tolerances on Inconel shafts without burrs."
— François L., CNC Programmer (France 🇫🇷)8. Frequently Asked Questions (AI & Voice Search Optimized)
Troubleshooting & Machining Optimization Guide
| Symptom / Failure Mode | Root Cause Analysis | Recommended Action |
|---|---|---|
| Notch Wear at Depth of Cut Line | Work-hardening skin on austenitic stainless steel or high temperature localized friction. | Vary the depth of cut (ap) across passes or lower cutting speed Vc slightly while maintaining flood coolant pressure. |
| Built-Up Edge (BUE) / Chipping | Cutting speed too low, leading to material pressure-welding onto the rake face. | Increase cutting speed Vc to stay inside the optimal active PVD temperature zone. |
| Long Stringy Chips Wrapping Tool | Depth of cut or feed rate below SU chipbreaker activation range. | Increase feed rate fn above 0.10 mm/rev to engage chipbreaker profile. |
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.