Mitsubishi WCMT020104 NX2525 Cermet Turning Inserts for Steel Finishing
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MITSUBISHI WCMT020104 NX2525
Uncoated Cermet Series | High-Mirror Surface Finish Specialist
Product Overview
The Mitsubishi WCMT020104 NX2525 is a premium 80° trigon indexable insert designed for the high-precision finishing of steel. Utilizing the legendary NX2525 cermet grade, this insert offers exceptional chemical stability and resistance to oxidation. It is the ideal choice for CNC lathe operations where achieving a mirror-like surface finish and maintaining strict dimensional tolerances are critical. The uncoated cermet substrate prevents material welding, ensuring clean, sharp cuts in carbon, alloy, and tool steels.
ISO Model Designation Guide
Trigon 80°
7° Relief
Tolerance
Hole/Chip
IC 3.97mm
Thick 1.59mm
Radius 0.4mm
Metric vs. Imperial Comparison
| Feature | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Number | WCMT 020104 | WCMT 1.21.21 |
| Inscribed Circle (IC) | 3.97 mm | 0.156 inch |
| Thickness | 1.59 mm | 0.063 inch |
Recommended Cutting Parameters
Optimized for P10-P20 Finishing Steel:
- Cutting Speed (Vc): 120 - 280 m/min (Higher Vc = Better Finish)
- Feed Rate (f): 0.05 - 0.15 mm/rev
- Depth of Cut (ap): 0.1 - 1.0 mm
*Pro Tip: For mirror finishes, ensure high-speed and light feed rate.*
Material Grade: NX2525 Cermet
The NX2525 grade is a non-coated cermet (Ceramic-Metal composite) that bridges the gap between carbide and ceramic. It offers high hardness and chemical stability at high temperatures, preventing built-up edge (BUE). This makes it perfect for precision turning where surface aesthetics are as important as dimensional accuracy.
Positive Rake Geometry
The WCMT geometry provides a 7° relief angle, reducing cutting force and heat generation. This ensures the workpiece remains stable, preventing vibration and ensuring the tool life of your cermet insert is maximized during fine finishing passes.
Essential Tool Holder Compatibility:
Shop Compatible SWLCR / SWGCR Boring BarsWorld-Wide Customer Success
⭐⭐⭐⭐⭐ "Mirror Finish Every Time" - Julien V., France
"I use these for final passes on small steel shafts. The NX2525 grade produces a finish that looks like it's been polished."
⭐⭐⭐⭐⭐ "Authentic and Fast" - Mark S., United Kingdom
"Received original Mitsubishi packaging. The cermet is incredibly tough for finishing passes. Excellent service."
⭐⭐⭐⭐ "Great Precision" - Kenji T., Japan
"Very stable dimensions on long runs. Good value for money compared to local suppliers."
⭐⭐⭐⭐⭐ "Superb Value" - Liam G., Australia
"Found these for my home CNC setup. They cut alloy steel like butter and leave a beautiful shine."
⭐⭐⭐⭐⭐ "Reliable Cermet" - Sofia R., Italy
"NX2525 is my go-to for all steel finishing. Low vibration and clean chips."
Technical Q&A
Q: Can I use cermet for roughing steel?
A: No. Cermet is designed for finishing only. Its high hardness makes it brittle; heavy roughing or interrupted cuts may cause chipping.
Q: Is this insert compatible with boring bars?
A: Yes, it is standard for SWLCR or SWGCR holders designed for 02-size trigon inserts.
Q: Does it require coolant?
A: Cermet can be run dry due to high thermal stability, but light coolant or mist can help with chip evacuation and cooling the workpiece.
Material Choice Tip: Cermet vs. Carbide
Choose NX2525 Cermet when your primary goal is surface aesthetics and dimensional precision. If you are doing bulk material removal or heavy roughing, stick with a CVD Coated Carbide like UE6110 for better toughness.