High-Performance Stainless Steel Turning | 100% Made in Japan
Product Overview
The Mitsubishi WNMG080408-MS MP735 is a premium, double-sided 80° trigon negative insert specifically engineered for the challenges of stainless steel turning. Utilizing the advanced MP735 PVD coating technology, this insert excels in preventing built-up edge and thermal cracking. Combined with the sharp MS chipbreaker and a versatile 0.8mm corner radius, this indexable carbide insert provides world-class chip control and an exceptional surface finish on austenitic, duplex, and heat-resistant stainless steels.
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
MS Medium-Sharp
Technical Specifications: Metric vs. Imperial
Feature
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 080408-MS
WNMG 432-MS
Inscribed Circle (IC)
12.7 mm
0.500 inch
Corner Radius
0.8 mm
0.031 inch
Specialized Grade: MP735 (PVD Coated Toughness)
The MP735 grade represents Mitsubishi's advanced PVD coating solution for stainless steel. Unlike traditional CVD coatings, the PVD process allows for a thinner, smoother, and sharper cutting edge. MP735 is specifically formulated to handle the high heat and stickiness of stainless steel, providing superior resistance to built-up edge (BUE) and maintaining a sharp edge for much longer, which significantly extends tool life in precision machining.
MS Chipbreaker Geometry
The MS (Medium-Sharp) chipbreaker is designed for finishing and light-to-medium cutting. It balances edge strength with sharpness, making it ideal for materials that tend to work-harden. The MS geometry ensures that chips are broken effectively even at low depths of cut, preventing long, stringy chips from interfering with your CNC lathe operations.
⭐⭐⭐⭐⭐ "Great for 316 Stainless" - David R., USA "The MP735 grade is very impressive. Much better than the older grades on gummy 316. Sharp and durable."
⭐⭐⭐⭐⭐ "Authentic Mitsubishi" - Lars M., Germany "Exactly what I needed for my CNC job shop. The MS chipbreaker keeps the chips short and the finish shiny."
⭐⭐⭐⭐ "Sharp Cutting Edge" - Kenji T., Japan "Very low cutting force compared to CVD inserts. Great for thin-walled stainless parts where vibration is an issue."
⭐⭐⭐⭐⭐ "Long Lasting" - Liam S., Australia "6 usable edges with the WNMG shape make this very economical. MP735 lasts twice as long as the generic brands."
⭐⭐⭐⭐⭐ "Perfect for Production" - Pavel D., Poland "Consistent performance across thousands of parts. Fast shipping and the real deal. Highly recommended."
Technical Q&A
Q: Why use PVD (MP735) over CVD (US735) for stainless?
A: PVD MP735 provides a sharper edge and better resistance to adhesion, making it superior for finishing and machining thin parts or gummy alloys.
Q: Is this insert compatible with standard WNMG holders?
A: Yes, it fits all standard MWLNR / DWLNR 2020 or 2525 tool holders designed for WNMG08 (WNMG 43) inserts.
Q: What is the maximum depth of cut for the MS breaker?
A: For the WNMG080408-MS, we recommend a maximum depth of cut of 3.0 mm for optimal stability and chip breaking.
Expert Choice Tip: MP735 vs MC7025
For Interrupted Cuts and difficult-to-machine stainless, MP735 is your best bet. If you have a Stable Setup and want higher speeds for mass production, consider MC7025.
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
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