Mirror Finishing Cermet Specialist | Precision Steel Turning | Made in Japan
Product Overview
The Mitsubishi WNMG080404 NX2525 is a high-performance double-sided 80° trigon insert designed for the ultimate surface finish in Steel turning. Unlike traditional carbide, the NX2525 Cermet grade (Ceramic + Metal) offers exceptional chemical stability and resistance to built-up edge. This makes it the ideal tool for precision machining where a mirror-like Ra finish and strict dimensional tolerances are required. Optimized for light finishing to semi-finishing, this indexable cermet insert excels in high-speed CNC machining of carbon, alloy, and mild steels.
ISO Designation Identification
W Trigon 80°
N Negative 0°
M Tolerance
G Hole/Chip
08 IC 12.7mm
04 Thick 4.76mm
04 Rad 0.4mm
Technical Specifications: Metric vs. Imperial
Technical Feature
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 080404
WNMG 431
Inscribed Circle (IC)
12.7 mm
0.500 inch
Corner Radius
0.4 mm
0.016 inch
Advanced Grade: NX2525 (Cermet Excellence)
The NX2525 grade is a non-coated Cermet that provides an ideal combination of hardness and thermal stability. Because Cermet has a low affinity for steel, it drastically reduces "built-up edge" (welding of the workpiece material to the insert). This property allows the WNMG080404 to maintain sharp cutting edges for longer periods, resulting in superior long-tail keywords performance and high-gloss finishes that coated carbides simply cannot match.
Precision Finishing Geometry
With a 0.4mm corner radius, this insert is tailored for fine finishing passes. It reduces cutting forces and heat generation, which is critical for preventing workpiece distortion in thin-walled parts. Used widely in CNC turning for automotive and aerospace components where high surface Ra quality is a non-negotiable requirement.
⭐⭐⭐⭐⭐ "Like a Mirror" - Alex T., Canada "Switched from coated carbide to this NX2525 cermet for the final pass on alloy steel shafts. The finish is literally like a mirror. No polishing needed!"
⭐⭐⭐⭐⭐ "Great Stability" - Satoshi W., Japan "Original Mitsubishi quality. The dimensional stability over a 500-piece run was impressive. Highly recommend for precision work."
⭐⭐⭐⭐ "No Built-up Edge" - Gunter H., Germany "Excellent resistance to welding when cutting mild steel. The edges stay sharp much longer than expected."
⭐⭐⭐⭐⭐ "Best for Finishing" - Liam J., Australia "If you are doing semi-finishing or finishing on a CNC, this is the insert. The 6 edges on WNMG make it very cost-effective too."
⭐⭐⭐⭐⭐ "Authentic Japanese Product" - Andrei S., Romania "100% genuine. Performance is top-tier. Shipping was fast and packaging was perfect."
Technical Q&A
Q: What is Cermet (NX2525) and when should I use it?
A: Cermet is a hybrid material of Ceramic and Metal. Use it for high-speed finishing of steel when you need a high-quality surface Ra finish and high wear resistance.
Q: Is this insert suitable for interrupted cuts?
A: Cermet is more brittle than carbide. It is best used for continuous cutting. For heavy interruptions, we recommend CVD coated grades like UE6020.
Q: How many edges do I get?
A: The WNMG shape is a double-sided trigon, providing 6 usable cutting edges, making it highly economical for machine shops.
Expert Machining Tip: Cermet vs. Coated Carbide
Choose NX2525 Cermet for high surface speed and superior finish. Choose MC6025 Coated Carbide for versatility, toughness, and heavy metal removal rates.
Mitsubishi WNMG080404 NX2525 Cermet Turning Inserts for Steel Finishing (10pcs)
$92.26
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