Mitsubishi DCMT070208 NX2525 Cermet Turning Insert for High-Feed Finish (10pcs)
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DCMT070208 NX2525
High-Speed Cermet | Robust 0.8mm Radius | Mirror Finish Grade
High-Feed Finishing Technology
NX2525 Grade (Titanium Cermet): Mitsubishi's NX2525 is a micro-grain Cermet grade designed for finishing. Unlike tungsten carbide, Cermet has a very low chemical affinity for steel, which prevents the material from "welding" to the insert edge. This eliminates surface tearing and results in a glossy, mirror-like finish. It thrives at high cutting speeds where standard carbide would fail due to heat.
DCMT Geometry (55° Diamond): The 55-degree shape offers the perfect clearance for profiling and facing. The positive rake angle reduces the cutting torque and heat generation, protecting the structural integrity of your workpiece while providing a clean "peeling" cut.
0.8mm Radius (The "Robust" Choice): The 0.8mm (08) radius is significantly stronger than the 0.2mm or 0.4mm versions. It allows for higher feed rates and provides better edge life when machining parts with slight surface scale or inconsistencies.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | DCMT070208 | 6.35 mm | 2.38 mm | 0.80 mm |
| Imperial | DCMT21.52 | 1/4" | 3/32" | 0.0315" (1/32") |
Recommended Cutting Parameters
*The 0.8mm radius allows for higher productivity. Maintain high surface speeds (Vc) to fully activate the Cermet properties.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045) | 200 - 450 m/min | 0.10 - 0.25 mm/r | 0.30 - 1.80 mm |
| Alloy Steel (4140) | 150 - 350 m/min | 0.08 - 0.20 mm/r | 0.30 - 1.50 mm |
Compatible Tooling
Optimized for use with SDJCR/L or SDUCR/L 07-series screw-lock holders:
Shop 07 Series Tool HoldersCermet Tip: NX2525 vs. Carbide Grade
NX2525 (Cermet): The choice for high-speed continuous finishing. It provides a superior "chrome-like" finish on steel. However, it is sensitive to thermal shock—if using coolant, ensure the flow is high and consistent; otherwise, dry machining is often preferred.
VP15TF (PVD Carbide): Better suited for interrupted cuts, heavy scale, or gummy stainless steel where the toughness of carbide is required.
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