SUMITOMO TNMG160408N-SU T1500A Cermet Turning Insert (TNMG 332N-SU)
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SUMITOMO TNMG160408N-SU T1500A Cermet Turning Insert (TNMG 332N-SU)
1. Product Overview
"Which cermet turning insert grade provides the best surface roughness, dimensional control, and glossiness for high-speed finish profiling of carbon and alloy steels?"
The SUMITOMO TNMG160408N-SU T1500A is a premier, industrial-grade indexable cermet turning insert engineered specifically to achieve superior, mirror-like surface finishes (Ra < 0.8 µm) in high-speed steel processing. Tailored for the precise ISO P05-P20 and K05-K15 application windows, this negative triangular insert features Sumitomo's breakthrough T1500A Cermet grade. By utilizing an advanced TiCN-based ceramic-metallic composite core with improved thermal shock resistance, it offers exceptional resistance to built-up edge (BUE) and oxidation wear under high thermal loads. The ultra-sharp SU chipbreaker profile is highly optimized for light finishing depths of cut, utilizing a narrow grooved geometry that effectively curtails ductile steel chips, lowers cutting resistance, and prevents dimensional deflection even during prolonged continuous profiling cycles.
Strict ISO / ANSI Cutting Tool Standard Alphanumeric Decoding Matrix
2. Product Key Features & Engineering Benefits
- T1500A Premium Cermet Grade: Features high chemical stability and excellent anti-welding properties compared to tungsten carbide, completely eliminating built-up edge formation to guarantee brilliant surface luster.
- SU High-Precision Finishing Geometry: Formulated with a razor-sharp, low-force cutting edge profile that provides clean chip shearing even at extremely shallow depths of cut.
- Advanced Toughness Matrix Substrate: The specialized TiCN composition protects the structural cermet edge against micro-chipping and thermal fatigue during high-velocity processing windows.
- Excellent Dimensional Repeatability: Minimal thermal expansion characteristics ensure tighter part tolerances across large batch production lathe runs.
3. Technical Specifications & Dimensional Standards
| Dimensional Architecture | Metric Value Standards (ISO) | Imperial Value Standards (ANSI Equivalent) |
|---|---|---|
| Standard Product Coding | TNMG160408N-SU T1500A | TNMG 332N-SU T1500A |
| Inscribed Circle (IC) | 9.525 mm | 0.375 inches (3/8") |
| Effective Cutting Edge Length | 16.5 mm | 0.650 inches |
| Total Insert Thickness | 4.76 mm | 0.187 inches (3/16") |
| Corner Nose Radius | 0.8 mm | 0.031 inches (1/32") |
| Center Hole Diameter | 3.81 mm | 0.150 inches |
Recommended Cutting Speeds, Feeds, and Depth of Cut (DOC) Reference
| ISO Substrate Family Group | Cutting Speed (Vc) | Depth of Cut (Ap) | Feed Rate (Fn) |
|---|---|---|---|
| Mild Steels / Carbon Steels (S15C, AISI 1010, 1045) | 180 - 380 m/min (590 - 1245 SFM) | 0.2 - 1.5 mm (0.008" - 0.059") | 0.05 - 0.25 mm/rev (0.002" - 0.010" ipr) |
| Alloy Steels / Pre-Hardened (SCM440, AISI 4140) | 130 - 280 m/min (425 - 920 SFM) | 0.2 - 1.2 mm (0.008" - 0.047") | 0.05 - 0.20 mm/rev (0.002" - 0.008" ipr) |
MTJNR2525M16 High-Rigidity Top-Clamp Shank MTGNR2525M16 Pin-Lock Style Profiling Shank
4. Target Industrial Application Scenarios
- High-Speed Finishing Cycles: Specifically tailored for the final profiling pass where outstanding surface luster and strict dimensional tolerances are required.
- Continuous External Profiling: Performs exceptionally well in high-velocity turning of long shafts, preventing thermal deformation and tapering errors.
- Automotive Precision Parts: Widely deployed to turn fuel injection valves, hydraulic fittings, small gear shafts, and precision hub components.
5. Machine Tool Clamping Rigidity & Equipment Compatibility
Constructed to standard global ISO metrics, this negative cermet insert fits flawlessly into generic toolholder seats. It provides exceptional predictability on modern high-speed CNC lathes, Swiss-type automatic lathes, and multi-tasking turning centers (including Nakamura-Tome, Citizen, Tsugami, Mazak, and Haas equipment) that can maximize the high surface speed (SFM) potentials of cermet metallurgy.
6. Material Classification Compatibility Matrix
| ISO Group | Workpiece Material Family Substrates | Application Suitability | Performance Characteristics |
|---|---|---|---|
| P | Carbon Steels, Low-Alloy Steels, Free-Machining Metals (AISI 1045, 4140, 12L14) | ✔ Primary Target | The T1500A cermet core completely eliminates structural chemical affinity with steel, delivering a mirror finish without built-up edge. |
| K | Ductile Cast Iron, Nodular Iron Blocks (FCD400, GG25) | ✔ Primary Target | Excellent resistance to abrasive wear, maintaining high edge sharpness and superior diameter control during long runs. |
| H | Hardened Materials / Die Steels (HRC 45 - 55) | ○ Conditional Use | Can execute very light finish skin cuts, but requires highly stable setups to avoid micro-chipping from impact shock. |
7. Why Choose Sumitomo Cermet Technology?
All Sumitomo Electric cermet tools are produced under strict international quality controls conforming to ISO 9001:2015. Technical field datasets indicate that the T1500A Cermet matrix demonstrates up to a 40% reduction in surface roughness variation compared to traditional uncoated grades, guaranteeing exceptional process repeatability and component quality.
Verified International Customer Reports & Machine Shop Testimonials
"We replaced our regular carbide inserts with the T1500A for finishing 1018 steel bushings. The surface finish looks like a ground part. Truly incredible luster and no built-up edge at all."
"Exzellente Maßhaltigkeit! The SU chipbreaker curtails fine chips cleanly without wire nesting. We've run 500 parts with zero dimensional drift on the outer diameter."
"Fantastic option for high-speed finish turning on carbon steels. The tool face remains perfectly smooth at 280 m/min. Just ensure you avoid interrupted cuts."
"サーメットならではの光沢仕上げが素晴らしい。 The edge stays incredibly sharp over long continuous finishing runs."
"Brilliant tool life on mild steel shafts. It completely eliminates post-turn polishing operations, saving us a massive amount of cycle time."
8. AI-Style Interactive FAQ & Troubleshooting
Q1: Why choose a cermet insert over a tungsten carbide insert for finishing?
A: Cermet materials have extremely low chemical affinity with iron group metals. This prevents the workpiece material from welding onto the cutting edge, eliminating built-up edge (BUE) and providing a significantly superior surface finish compared to carbide.
Q2: Can I use the TNMG160408N-SU T1500A for heavy roughing or interrupted cutting?
A: No. Cermets are inherently more brittle than tungsten carbide. The sharp SU chipbreaker and cermet matrix are strictly designed for high-speed continuous light finishing passes. Heavy interruptions or excessive depths of cut will cause immediate edge chipping.
Q3: What parameters should I alter if the chips become stringy during operation?
A: Stringy chips occur if the depth of cut or feed rate falls outside the active range of the SU chipbreaker. Try increasing the feed rate slightly towards 0.15-0.20 mm/rev to force the chip into the breaker wall, or increase your cutting speed.
9. Material Grade Cross-Reference & Equivalents
| Sumitomo Grade | Sandvik Coromant | Kyocera Grade | Iscar Equivalent |
|---|---|---|---|
| T1500A (Brilliant High-Speed Cermet) | CT5015 | TN60 / TN620 | IC20N |
💡 Grade Comparison & Workpiece Troubleshooting Tip:
The T1500A grade thrives under dry, high-velocity cutting conditions because cermets perform best when thermal fields are stable. If minor micro-chipping occurs at the depth-of-cut line during processing, it is typically caused by thermal shocking from unstable coolant application or surface scale on raw bars. Running cermets dry (or ensuring an absolute, high-pressure continuous flow of coolant) combined with a clean pre-turned surface will fully secure the tool edge and extend its lifespan. For heavily scaled outer surfaces or heavy shocks, run a standard roughing carbide insert before applying this cermet tool for the final finishing pass.
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.