Mitsubishi TPGH080204L-FS AP25N | Left-Hand Cermet Turning Insert
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TPGH080204L-FS AP25N
Mitsubishi Materials | High-Speed Steel Finishing Cermet (Left-Hand)
Mirror-Finish Steel Machining
The Mitsubishi TPGH080204L-FS AP25N is a Left-Hand (L) high-precision Cermet insert designed for super-finishing steel. The AP25N grade combines the toughness of carbide with the heat resistance of ceramic, allowing for higher cutting speeds and a glossy surface finish. Paired with the FS chipbreaker, it is the ultimate choice for CNC boring and finishing where dimensional accuracy and aesthetic quality are paramount.
Advanced Cermet AP25N | 11° Positive Relief | FS Precision Breaker
Technical Code Identification
Triangular Shape
11° Positive Relief
G-Class Tolerance
Cylindrical Hole
8mm Edge Length
2.38mm Thick
0.4mm Radius
Left-Hand
Finish Breaker
ISO (Metric) vs ANSI (Inch) Comparison
| Technical Spec | ISO Model (Metric) | ANSI Model (Inch) |
|---|---|---|
| Part Number | TPGH080204L-FS | TPGH 1.51.51L FS |
| Inscribed Circle | 4.76 mm | 0.187" (3/16") |
| Corner Radius | 0.4 mm | 0.016" (1/64") |
AP25N Cermet Grade
AP25N is an advanced TiCN-based Cermet. Because Cermet has a low affinity for steel, it resists built-up edge and oxidation at high temperatures. This long-tail precision insert is ideal for maintaining tight tolerances and achieving mirror finishes in carbon and alloy steel finishing.
FS "Super-Finish" Breaker
The FS chipbreaker is designed for ultra-fine finishing. It curtails long chips at very low depths of cut and feed rates, ensuring chips do not scratch the workpiece—a critical factor in high-quality CNC boring applications.
Recommended Cutting Parameters
| Workpiece Material | Speed ($v_c$) | Feed ($f$) | DOC ($a_p$) |
|---|---|---|---|
| Carbon Steel / Alloy Steel | 150 - 300 m/min | 0.05 - 0.15 mm/rev | 0.1 - 1.0 mm |
| Soft Steels / Mild Steel | 180 - 350 m/min | 0.05 - 0.12 mm/rev | 0.1 - 0.8 mm |
REQUIRED LEFT-HAND HOLDERS
Designed for Left-Hand (L) tool paths. Optimized for use with standard STFPL or STGPL boring bars.
Shop Boring Bars →
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.