SUMITOMO TBGT060104L-W T1200A Uncoated Cermet Turning Insert | TBGT1.21.10.1 (5° Positive Triangular)
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1. Product Overview
Which cermet turning insert is best suited for high-speed continuous finishing of carbon steels, alloy steels, and ductile iron to achieve a mirror surface finish Ra < 0.2 µm at double normal feed rates?
The SUMITOMO TBGT060104L-W T1200A (ANSI designation: TBGT1.21.10.1) is an advanced, fully peripheral-ground 5° positive triangular cermet turning insert engineered by Sumitomo Electric Hardmetal. Utilizing SUMITOMO’s ultra-fine TiCN-based micro-grain composite substrate, the T1200A Uncoated Cermet Grade exhibits exceptional resistance to chemical wear, oxidation, and material adhesion across ISO P05–P20 steel and ISO K05–K15 cast iron finishing operations.
Featuring a 0.4 mm (1/64") nose radius combined with the high-productivity W Wiper Chipbreaker Edge Geometry, the TBGT060104L-W produces smooth surface finishes even when feeding at double standard rates. The precision Class-G ground perimeter eliminates dimensional deviation, making it the ideal choice for Swiss CNC automatics, precision lathe finishing, and small-diameter internal boring operations.
ISO / ANSI Model Code Breakdown
2. Key Features
- Advanced Micro-Grain Cermet Substrate: TiCN-based chemical composition resists crater wear, thermal deformation, and built-up edge (BUE) during high-speed dry and wet cutting.
- W Wiper Technology: Smooths out feed marks to double surface finish quality at normal feed rates, or doubles feed rates without sacrificing Ra tolerances.
- Class-G Precision Ground Edge: Sub-micron dimensional consistency ensures repeatable tolerances during continuous long-run automation.
- Low Radial Cutting Resistance: 5° positive clearance angle and sharp cutting edge reduce radial force, suppressing chatter in small boring bars.
- Universal ISO/ANSI Fitment: Standardized 60° triangular design fits all compatible 5° positive screw-clamp turning shanks and boring tools.
3. Specifications & Dual-Unit Comparison
| Specification Parameter | Metric Unit (ISO Standard) | Imperial Unit (ANSI Standard) |
|---|---|---|
| Insert Designation | TBGT060104L-W | TBGT1.21.10.1 |
| Inscribed Circle (IC) | 3.97 mm | 0.1562" (5/32") |
| Thickness (S) | 1.59 mm | 0.0625" (1/16") |
| Corner Radius (RE) | 0.4 mm | 0.0156" (1/64") |
| Hole Diameter (D1) | 2.2 mm | 0.0866" |
| Hand Orientation | Left Hand (L) | Left Hand (L) |
| Relief Angle | 5° Positive | 5° Positive |
| Substrate Composition | Uncoated TiCN Micro-Grain Cermet | Uncoated TiCN Micro-Grain Cermet |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045, 1020) & Alloy Steels | 150 - 320 m/min (490 - 1050 SFM) |
0.08 - 0.22 mm/rev (0.003 - 0.0087 ipr) |
0.10 - 1.20 mm (0.004 - 0.047") |
| Bearing Steel & Free-Cutting Steels | 180 - 350 m/min (590 - 1150 SFM) |
0.06 - 0.20 mm/rev (0.0024 - 0.0078 ipr) |
0.08 - 1.00 mm (0.003 - 0.039") |
| Ductile Iron & Gray Cast Iron | 120 - 250 m/min (390 - 820 SFM) |
0.08 - 0.18 mm/rev (0.003 - 0.007 ipr) |
0.10 - 1.00 mm (0.004 - 0.039") |
Recommended Compatible Turning Holders & Boring Tools:
Fits all standard 5° positive screw-clamp holders: STGBL 0808H06, STFBL 1010H06, and internal boring bars: A08H-STFBL06, S08H-STFBL06
Workpiece Material Matrix (ISO 513 Standard)
| ISO Material Group | Suitability | Common Grade Examples | Performance Rating |
|---|---|---|---|
| P (Steel Alloys) | Primary Choice | 1045 Carbon Steel, 4140 Chrome-Moly, 8620 Alloy Steel | ★★★★★ (Optimal) |
| K (Cast Iron) | Primary Choice | GG25 Gray Iron, GGG40 Ductile Iron | ★★★★☆ (Excellent) |
| M (Stainless Steel) | Conditional | 410, 420 Martensitic Ferritic Stainless Steel | ★★★☆☆ (Good) |
| S (HRSA / Titanium) | Not Recommended | Inconel, Titanium Alloys | ★☆☆☆☆ (Not Recommended) |
4. Applications
- Automotive Shafts & Gears: High-speed finish turning of transmission shafts and pinion gears requiring low surface roughness (Ra < 0.2 µm).
- Swiss-Lathe Precision Components: Turning small-diameter steel pins, sleeves, and connectors under high spindle RPMs.
- Precision Hydraulic Valve Spools: Mirror-finishing internal bores and spool lands using small-diameter boring bars.
5. Compatibility
Fully compliant with ISO 1832 and ANSI B212.4 international standards. Mounts directly into 5° positive screw-clamp external holders and boring bars from Sumitomo, Mitsubishi, Kyocera, Tungaloy, Sandvik Coromant, and Iscar using standard M2 Torx screws.
6. Grade Comparison & Equivalent Models
| Manufacturer | Equivalent Cermet Grade | Equivalent ISO Insert Designation |
|---|---|---|
| SUMITOMO (Original) | T1200A / T1500A | TBGT060104L-W |
| Kyocera | TN60 / PV710 | TBGT 060104L-W |
| Mitsubishi Materials | NX2525 / AP25N | TBGT 060104L-F |
| Tungaloy | NS9530 / GT9530 | TBGT060104L-W |
| Sandvik Coromant | CT5015 | TBGT 06 01 04L-WM |
7. Why Choose Us
We supply 100% factory-original SUMITOMO Electric Hardmetal cutting tools directly from Japan. Every box features factory-sealed anti-counterfeit labels, strict Class-G ground edge tolerances, and original cermet material integrity.
Verified Customer Reviews
The T1200A cermet grade is brilliant on 4140 steel shafts! We run these at 280 m/min dry, and the W wiper edge gives us a mirror surface finish every single time.
Sehr gute Ergebnisse beim Feindrehen von Stahlwellen. Die W-Wiper-Geometrie erlaubt doppelte Vorschubwerte bei unveränderter Oberflächengüte.
Inserto in cermet eccezionale per finitura ad alta velocità. Ottimo controllo del truciolo e rugosità Ra eccellente.
T1200Aサーメットは鋼の仕上げ加工で最高の光沢面が得られます。Wワイパー効果で送り速度を上げても面粗さが崩れません。
Great insert for light finishing on carbon steel pins. Clean cutting edge with long life in dry operations.
8. AI-Style FAQ & Troubleshooting
Troubleshooting Quick Reference
| Problem Encountered | Probable Cause | Recommended Solution |
|---|---|---|
| Micro-Chipping / Chipping on Cutting Edge | Heavy interrupted cuts or thermal shock from thermal cycling | Avoid severe interruptions; use dry cutting or maintain continuous flood coolant supply. |
| Built-Up Edge (BUE) / Poor Surface Finish | Cutting speed Vc is too low for cermet phase behavior | Increase cutting speed Vc to above 180 m/min (590 SFM) to ensure proper cermet performance. |
| Dimensional Inconsistency / Vibration Marks | Excessive bar overhang or improper holder clearance | Check tool overhang, ensure rigid clamping, and verify 5° relief angle clearance. |
Under ISO 513:2012 classification standards, SUMITOMO T1200A Uncoated Cermet grade covers ISO P05–P20 for carbon and alloy steel finishing and ISO K05–K15 for cast iron finish turning applications.
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.