Mitsubishi TPGH090204L-FS AP25N | Left-Hand Cermet Turning Insert
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TPGH090204L-FS AP25N
Mitsubishi Materials | High-Speed Steel Finishing Cermet (Left-Hand)
Ultra-Precision Finishing Cermet
The Mitsubishi TPGH090204L-FS AP25N is a high-performance Left-Hand (L) Cermet turning insert. Specifically engineered for the high-speed finishing of steel, the AP25N Cermet grade provides exceptional chemical stability and wear resistance. This prevents the "built-up edge" common in carbon steels. Combined with the FS chipbreaker, it is the premier choice for CNC boring and finishing where a mirror surface and tight tolerances are mandatory.
Advanced Cermet Grade | 11° Positive Relief | FS Precision Breaker
Technical Code Identification
Triangular Shape
11° Positive Relief
G-Class Tolerance
Hole/Chip Feature
9mm Edge Length
2.38mm Thick
0.4mm Radius
Left-Hand
Finish Breaker
ISO (Metric) vs ANSI (Inch) Reference
| Specification | ISO Model (Metric) | ANSI Model (Inch) |
|---|---|---|
| Part Number | TPGH090204L-FS | TPGH 21.51L FS |
| Inscribed Circle (IC) | 5.56 mm | 0.219" (7/32") |
| Nose Radius | 0.4 mm | 0.016" (1/64") |
AP25N Cermet Technology
AP25N is a TiCN-based Cermet grade. Because of its low affinity for steel, it resists chemical wear and built-up edge even during long finishing cycles. This long-tail precision insert is specifically tuned for maintaining glossy, high-integrity surface finishes in carbon and alloy steels.
FS Chipbreaker Design
The FS chipbreaker features a high positive rake angle with a specialized finish land. It is optimized for low feed rates and shallow depths of cut, ensuring excellent chip evacuation and preventing the "bird-nesting" of chips that can damage delicate surface finishes.
Recommended Cutting Parameters
| Material | Speed ($v_c$) | Feed ($f$) | DOC ($a_p$) |
|---|---|---|---|
| Carbon Steel | 150 - 350 m/min | 0.05 - 0.15 mm/rev | 0.1 - 1.0 mm |
| Alloy Steel | 120 - 300 m/min | 0.05 - 0.12 mm/rev | 0.1 - 0.8 mm |
REQUIRED LEFT-HAND HOLDERS
Designed for Left-Hand (L) tool paths. Use with STFPL or STGPL boring bars and tool holders.
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.