High-Precision PVD Stainless Steel Specialist | 100% Made in Japan
Product Overview
The Mitsubishi WNMG080408-MA MP735 is a next-generation, double-sided 80° trigon negative insert optimized for the precision turning of stainless steel. Engineered in Japan, it utilizes the advanced MP735 PVD coating, which provides a sharper cutting edge and higher adhesion resistance compared to traditional CVD grades. Featuring the MA chipbreaker and a robust 0.8mm radius, this indexable carbide insert is ideal for medium-duty CNC machining where maintaining tight tolerances and a superior surface finish on austenitic stainless steels is critical.
ISO Designation Identification
W Trigon 80°
N Negative 0°
M Tolerance
G Hole/Chip
08 IC 12.7mm
04 Thick 4.76mm
08 Radius 0.8mm
MA Medium Cut
Technical Specifications: Metric vs. Imperial
Feature
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 080408-MA
WNMG 432-MA
Inscribed Circle (IC)
12.7 mm
0.500 inch
Corner Radius
0.8 mm
0.031 inch
Advanced Grade: MP735 (PVD Technology)
The MP735 grade represents a breakthrough in PVD (Physical Vapor Deposition) coating. While CVD grades focus on thickness, MP735 focuses on edge toughness and the prevention of built-up edge (BUE). This makes it the superior choice for high-precision stainless steel machining, where material "sticking" can ruin surface quality. It maintains a sharper edge for longer, reducing cutting forces and vibrations.
MA Chipbreaker Geometry
The MA chipbreaker is an all-purpose medium-cutting geometry. It balances a sharp cutting action with a land that reinforces the edge against chipping. It is specifically designed to handle the difficult chip control requirements of gummy stainless steels, ensuring chips break cleanly and do not wrap around the CNC turning tool holder.
⭐⭐⭐⭐⭐ "PVD makes the difference" - James H., USA "I was using US735, but the MP735 gives me a much better finish on 316 stainless. The edge stays sharper for precision work."
⭐⭐⭐⭐⭐ "Authentic Japan Tooling" - Lars E., Sweden "Exactly what I needed for our CNC lathe production. These Mitsubishi inserts are incredibly consistent."
⭐⭐⭐⭐ "Great Chip Breaking" - Sato K., Japan "The MA geometry works very well. No bird-nesting on the spindle even with higher feed rates."
⭐⭐⭐⭐⭐ "Solid Value" - Andrej B., Poland "6 usable edges per insert makes these very cost-effective. Shipping was fast and product is 100% original."
⭐⭐⭐⭐⭐ "Best for Stainless" - Giovanni R., Italy "Zero issues with notch wear. The MP735 coating is the best I've tried for medium-duty stainless turning."
Technical Q&A
Q: Can I use this for roughing?
A: It is excellent for medium roughing and general turning. For extremely heavy, interrupted roughing, a CVD grade like US735 might be more robust, but MP735 offers better precision.
Q: Is this insert compatible with standard MWLNR holders?
A: Yes, it is a standard ISO WNMG 080408 insert and fits all MWLNR/DWLNR turning holders of the corresponding size.
Q: What makes this better for stainless than carbon steel?
A: The MP735 coating is chemically formulated to resist the adhesive nature of stainless steel, whereas carbon steel grades focus more on crater wear resistance.
CNC Expert Tip: CVD vs. PVD for Stainless
Use MP735 (PVD) for high surface finish and sharp precision. Use US735 (CVD) for heavy metal removal and deep interrupted cuts. Matching the coating to your cut type can extend tool life by 30-50%!
Mitsubishi WNMG080408-MA MP735 Carbide Turning Inserts for Stainless Steel (10pcs)
$92.26
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