Mitsubishi CNMG120404-SH NX2525 Cermet Finishing Insert (10pcs)
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CNMG120404-SH NX2525
High-Gloss Finishing | NX2525 Cermet Technology | SH Stability Geometry
Precision Engineering for Superior Aesthetics
NX2525 Grade (Ultra-Micro Cermet): NX2525 is an uncoated TiCN-based cermet grade. It provides a unique combination of high wear resistance and toughness. Unlike traditional carbide, cermet maintains a chemically inert edge at high speeds, which prevents the workpiece material from welding to the tip. This results in the high-gloss "mirror" finish required in automotive and precision instrument components.
SH Chipbreaker (The Versatile Finisher): The SH geometry is the standard choice for finishing. It features a slightly stronger edge than the FH series, allowing it to handle minor interruptions and fluctuating depths of cut while maintaining excellent chip evacuation and low cutting resistance.
0.4mm (1/64") Precision Radius: The 04 radius is optimized to reduce radial cutting forces. This is critical for preventing chatter on long, slender parts and achieving tight dimensional tolerances on final passes.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404-SH | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431-SH | 1/2" | 3/16" | 0.0157" (1/64") |
Finishing Cutting Parameters
*Cermet performs best at high speeds. Lower speeds may cause edge chipping. Use light depths of cut for best Ra values.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Mild Steel / Carbon Steel | 200 - 450 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Alloy Steel / Tool Steel | 150 - 300 m/min | 0.05 - 0.15 mm/r | 0.20 - 1.20 mm |
Compatible Tool Holders
Maximum rigidity ensures the best cermet performance. Use DCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: NX2525 vs. AP25N
NX2525 (High Precision): Use this uncoated grade for the absolute best surface gloss and when machining soft/sticky steels that prone to sticking.
AP25N (High Production): Switch to AP25N (Coated Cermet) if you need higher wear resistance for longer production runs or slightly more toughness for semi-finishing.
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