Mitsubishi DCMT070204 NX2525 Cermet Turning Insert for Mirror Finish (10pcs)
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DCMT070204 NX2525
High-Velocity Cermet | Mirror Finish Grade | 55° Diamond Precision
The Cermet Advantage: High-Gloss Finishing
NX2525 Grade (Titanium-Based Cermet): The NX2525 is a premium micro-grain Cermet. Unlike carbide, Cermet can withstand much higher cutting speeds while maintaining a sharp edge. Its superior resistance to thermal cracking and oxidation makes it the industry standard for achieving reflective, high-gloss surface finishes on carbon steels, alloy steels, and ductile irons.
Standard Chipbreaker (Versatile Finisher): This DCMT geometry features a positive rake angle that reduces cutting forces and heat. It is optimized for light to medium finishing depths, ensuring excellent chip evacuation and preventing the "re-cutting" of chips that often ruins surface quality.
Nose Radius (0.4mm): The 0.4mm radius (04) provides excellent edge toughness. It is robust enough to handle the pressures of finishing while producing a superior Ra value (surface roughness) compared to larger radii.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | DCMT070204 | 6.35 mm | 2.38 mm | 0.40 mm |
| Imperial | DCMT21.51 | 1/4" | 3/32" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Cermet requires high spindle speeds to work effectively. Avoid slow speeds and heavy interrupted cuts.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Mild / Carbon Steel | 150 - 400 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Alloy Steel / SCM | 120 - 300 m/min | 0.05 - 0.15 mm/r | 0.20 - 1.20 mm |
Compatible Tooling
Maximum stability for finishing with SDJCR/L or SDUCR/L holders:
Shop 07 Series Tool HoldersPro-Tip: Cermet (NX2525) vs. Carbide (VP15TF)
NX2525 Cermet: The "Finish Specialist." Choose this when you want the part to look like a mirror. Best for dry or wet finishing on steels at high RPM.
VP15TF Carbide: The "All-Rounder." Choose this for toughness, interrupted cuts, or when machining stainless steel and exotic alloys where cermet might chip.
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