SUMITOMO TCMT110208N-SU AC530U Carbide Turning Insert | TCMT21.52 (7° Positive Triangular)
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1. Product Overview
Which positive triangular indexable turning insert offers maximum thermal wear resistance, notch toughness, and chip control when machining aerospace-grade Superalloys, Titanium alloys, and difficult Stainless Steels?
The SUMITOMO TCMT110208N-SU AC530U (ANSI designation: TCMT21.52) is an industrial-grade, 7° positive clearance triangular turning insert manufactured by Sumitomo Electric Hardmetal. Powered by SUMITOMO's breakthrough AC530U Super-PVD (TiAlSiN + AlTiN multi-layer) Coating Grade, this insert is specifically engineered for high-heat, high-stress machining across ISO S05–S25 (Exotic Superalloys & Titanium) and ISO M10–M25 (Stainless Steels) application spectrums.
Featuring an engineered 0.8 mm (1/32") nose radius, neutral edge preparation, and the 3D SU General Medium-Cut Chipbreaker, the TCMT110208N-SU excels at preventing work-hardening notch wear, suppressing chatter on low-rigidity setups, and curling stringy, ductile alloys into compact C-shaped chips for clean evacuation in Swiss-type CNC lathes and internal boring bars.
ISO / ANSI Model Code Breakdown
2. Key Features
- Super-PVD Absotech® Coating Technology: Advanced multi-layer TiAlSiN / AlTiN structure provides exceptional thermal barrier protection up to 1,100°C, preventing crater wear and thermal fatigue.
- High Thermal Shock Resistance: Formulated for continuous or light-interrupted cutting with or without high-pressure coolant without micro-cracking.
- Optimized 0.8 mm Nose Strength: Delivers superior corner durability under heavy radial pressure while enabling smooth feed rates up to 0.22 mm/rev.
- SU Low-Force Chipbreaker: Formed 3D rake geometry shears ductile material cleanly, drastically reducing work hardening on heat-resistant superalloys.
- Universal ISO/ANSI Fit: Fits standard metric STGCR/STFCR turning holders and A/S-STFCR internal boring bars.
3. Specifications & Dual-Unit Comparison
| Specification Parameter | Metric Unit (ISO Standard) | Imperial Unit (ANSI Standard) |
|---|---|---|
| Insert Designation | TCMT110208N-SU | TCMT21.52 |
| Inscribed Circle (IC) | 6.35 mm | 0.250" (1/4") |
| Thickness (S) | 2.38 mm | 0.094" (3/32") |
| Corner Radius (RE) | 0.8 mm | 0.0312" (1/32") |
| Hole Diameter (D1) | 2.8 mm | 0.110" |
| Relief Angle | 7° Positive | 7° Positive |
| Coating Structure | Super-PVD (TiAlSiN / AlTiN) | Super-PVD (TiAlSiN / AlTiN) |
| Manufacturer / Origin | SUMITOMO / Japan | SUMITOMO / Japan |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Titanium Alloys (Ti-6Al-4V, Ti-6242) | 40 - 90 m/min (130 - 295 SFM) |
0.08 - 0.20 mm/rev (0.003 - 0.008 ipr) |
0.4 - 2.2 mm (0.016 - 0.086") |
| Inconel & Ni-Base Superalloys (Inconel 718/625, Hastelloy) | 25 - 60 m/min (80 - 195 SFM) |
0.06 - 0.16 mm/rev (0.002 - 0.006 ipr) |
0.3 - 1.8 mm (0.012 - 0.070") |
| Duplex & Austenitic Stainless (304, 316L, 2205) | 100 - 180 m/min (330 - 590 SFM) |
0.08 - 0.22 mm/rev (0.003 - 0.009 ipr) |
0.5 - 2.5 mm (0.020 - 0.098") |
Recommended Compatible Turning Holders & Boring Bars:
Fits all standard ISO screw-clamp external holders: STGCR/L 1212H11, STFCR/L 1616H11, and Internal Boring Bars: A12M-STFCR11, S12M-STFCR11
Workpiece Material Matrix (ISO 513 Standard)
| ISO Material Group | Suitability | Common Grade Examples | Performance Rating |
|---|---|---|---|
| S (Superalloys / Ti) | Primary Choice | Ti-6Al-4V, Inconel 718, Hastelloy C276, Waspaloy | ★★★★★ (Optimal) |
| M (Stainless Steel) | Primary Choice | AISI 304, 316L, 17-4PH, Duplex 2205, 2507 | ★★★★★ (Optimal) |
| P (Steel Alloys) | Secondary Choice | High-Temp Alloy Steels, Hardened Steel (<45 HRC) | ★★★☆☆ (Good) |
| K (Cast Iron) | Conditional | Ductile Iron, Ni-Resist Cast Iron | ★★☆☆☆ (Limited) |
4. Applications
- Aerospace Component Turning: High-precision turning of titanium turbine components, engine rings, and aerospace fasteners.
- Medical & Chemical Valves: Machining corrosion-resistant 316L and Inconel pump shafts, flanges, and valve seats.
- Small-Bore Internal Boring: High-clearance internal profile turning in tough alloys using 12mm and 16mm carbide boring bars.
5. Compatibility
Fully compliant with ISO 1832 and ANSI B212.4 international standards. Directly mounts into positive screw-clamp toolholders and boring bars from Sumitomo, Kennametal, Sandvik Coromant, Iscar, Tungaloy, and Kyocera utilizing standard M2.5 Torx screws.
6. Grade Comparison & Equivalent Models
| Manufacturer | Equivalent Grade | Equivalent ISO Insert Designation |
|---|---|---|
| SUMITOMO (Original) | AC530U (Super-PVD) / AC520U | TCMT110208N-SU |
| Sandvik Coromant | GC1105 / GC1115 | TCMT 11 02 08-SM / -MF |
| Iscar | IC806 / IC907 | TCMT 110208-SM |
| Kyocera | PR1535 / PR1225 | TCMT 110208HQ |
| Tungaloy | AH8015 / AH630 | TCMT110208-PSS |
7. Why Choose Us
We supply 100% factory-original SUMITOMO Electric Hardmetal cutting tools imported directly from Japan. Every shipment comes in factory-sealed anti-counterfeit packaging with guaranteed dimensional lot tolerances and certified coating thickness.
Verified Customer Reviews
We perform continuous turning on Ti-6Al-4V aerospace fittings. The AC530U grade from Sumitomo holds notch wear back far better than any grade we have tested. The 0.8mm corner is rock solid.
Hervorragende Leistung bei Inconel 718. Die PVD-Beschichtung AC530U zeigt extrem hohe Thermoschockbeständigkeit beim Nasstrehen.
Inserti eccezionali per la lavorazione di duplex e super duplex. Il rompituciolo SU controlla perfettamente il truciolo e riduce i tempi fermo macchina.
チタン合金およびインコネル加工においてAC530Uは絶大な信頼性があります。TCMT110208N-SUの切削抵抗の低さと耐境界摩耗性は素晴らしいです。
Great insert for small bore boring bars in Hastelloy C276. Holds radius profile extremely well over long production runs.
8. AI-Style FAQ & Troubleshooting
Troubleshooting Quick Reference
| Problem Encountered | Probable Cause | Recommended Solution |
|---|---|---|
| Notch Wear at Depth-of-Cut Line | Work-hardened outer layer on Inconel or Titanium wearing the edge line | Vary the depth of cut (ap) across passes or use a lead angle holder like STGCR (91°). |
| Thermal Cracking / Micro-Chipping | Intermittent coolant flow causing rapid heating and cooling thermal shock | Ensure constant high-flow flood coolant, or run dry with air blast if cutting speeds are low. |
| Built-Up Edge (BUE) / Material Welding | Cutting speed Vc is too low for the Super-PVD coating activation | Increase Vc by 15-20% to generate sufficient shear heat for smooth chip sliding. |
Under ISO 513:2012 classification standards, SUMITOMO AC530U Super-PVD grade falls under ISO S05–S25 for heat-resistant alloys/titanium and ISO M10–M25 for stainless steel, serving as the benchmark choice for high-reliability aerospace manufacturing.
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.