Mitsubishi CNMG120404 NX2525 Cermet Finishing Insert for Steel (10pcs)
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CNMG120404 NX2525
High-Speed Finishing Master | NX2525 Cermet Grade | Mirror Finish
The Cermet Advantage: NX2525 Grade
NX2525 Cermet Grade: Mitsubishi’s NX2525 is a high-performance Cermet grade (Titanium Carbonitride based). Because cermet has a low affinity for workpiece materials like steel and stainless steel, it eliminates the "sticking" effect. This ensures that the insert maintains a sharp cutting edge for much longer than coated carbide, delivering superior surface brightness (Ra values) and high-speed stability.
Standard CNMG Chipbreaker: This insert features a precision-engineered chipbreaker designed for finishing and semi-finishing operations. It effectively controls chip flow at shallow depths of cut, preventing long, stringy chips from tangling around the workpiece or tool holder.
0.4mm (1/64") Radius: The 04 radius is the specialist for Precision Finishing. It generates lower radial cutting forces, which is essential for machining thin parts or maintaining tight tolerances without vibration or chatter.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404 | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431 | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Cermet thrives at high surface speeds. For best results, use dry cutting or flood coolant; avoid intermittent cooling to prevent thermal shock.
| Material Group | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel / Alloy Steel | 150 - 400 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Stainless Steel (Finishing) | 120 - 250 m/min | 0.05 - 0.15 mm/r | 0.20 - 1.00 mm |
Compatible Tool Holders
Engineered for DCLNR/L 12 and MCLNR/L 12 series Turning Tools:
Shop DCLNR 12 HoldersPro-Tip: Cermet vs. Coated Carbide
NX2525 (Cermet): The Finishing Specialist. Use this when your priority is the highest surface finish quality and dimensional precision. It excels in stable, high-speed continuous cuts.
VP15TF (Coated Carbide): The Toughness King. Switch to coated carbide if you are performing heavy roughing or dealing with interrupted cuts, as Cermet is more brittle than carbide.
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