Mitsubishi DCMT11T308 NX2525 Cermet Turning Insert for Steel Finishing (10pcs)
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DCMT11T308 NX2525
High-Speed Cermet | Robust 0.8mm Radius | Mirror Finish Grade
High-Efficiency Cermet Finishing
NX2525 Grade (Titanium-Based Cermet): Mitsubishi's NX2525 is a micro-grain cermet grade designed for finishing. Unlike carbide, Cermet has a very low chemical affinity for steel, which prevents "Built-up Edge" (BUE). This results in a glossy, mirror-like finish and exceptional dimensional stability. It is the premier choice for high-speed continuous cutting where surface aesthetics are critical.
DCMT Geometry (Positive 55° Diamond): The 55-degree diamond shape provides excellent clearance for profiling and facing. The positive rake angle significantly reduces cutting resistance and heat generation, protecting the workpiece from thermal distortion during the final pass.
0.8mm Radius (Increased Productivity): The 0.8mm (08) radius offers superior edge toughness compared to smaller radii. It allows for higher feed rates while maintaining a high-quality surface finish, making it ideal for larger components or semi-finishing applications where speed is essential.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | DCMT11T308 | 9.525 mm | 3.97 mm | 0.80 mm |
| Imperial | DCMT32.52 | 3/8" | 5/32" | 0.0315" (1/32") |
Recommended Cutting Parameters
*Cermet requires high spindle speeds to prevent chipping. The 0.8mm radius allows for more aggressive feeds than smaller radii.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045) | 200 - 450 m/min | 0.10 - 0.30 mm/r | 0.30 - 2.00 mm |
| Alloy Steel (4140) | 150 - 350 m/min | 0.08 - 0.25 mm/r | 0.30 - 1.50 mm |
Compatible Tool Holders
Ensure maximum rigidity with SDJCR/L or SDUCR/L 11-series holders:
Shop SDJCR 11 HoldersGrade Comparison: NX2525 vs. Carbide
NX2525 (Cermet): Specifically optimized for high-speed continuous finishing. It provides a superior "Mirror" finish compared to any coated carbide. However, it is more brittle than carbide and should not be used for heavy interrupted cuts.
VP15TF (PVD Carbide): Use this when toughness is required, such as in interrupted cuts, machining through scale, or when working with stainless steels and superalloys.
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