Mitsubishi TPGH090204L-FS AP25N | Left-Hand Cermet Turning Insert
30-Day Free Returns
Free Worldwide Shipping
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 →