The Ultimate Stainless Steel Specialist | Made in Japan
Product Overview
The Mitsubishi WNMG080408-MA US735 is a premium, double-sided 80° trigon negative insert, globally recognized for its excellence in stainless steel turning. Manufactured in Japan, it features the industry-leading US735 CVD coating, providing extreme toughness and resistance to thermal shock. When your CNC lathe demands reliability for medium-range cutting in austenitic stainless steel, the 0.8mm radius and MA chipbreaker provide the perfect balance of edge strength and chip evacuation efficiency.
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
Technical Features
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
High-Performance Material: US735 CVD Grade
The US735 grade is Mitsubishi's specialized solution for heavy-duty stainless turning. This grade utilizes a toughened carbide substrate combined with a multi-layer CVD coating that provides an effective barrier against the high temperatures generated when machining stainless steel. It excels in interrupted cuts and prevents plastic deformation of the cutting edge.
MA Chipbreaker Profile
The MA (Medium-range) chipbreaker is an industry standard for versatility. It balances sharpness for low cutting resistance with reinforcement for edge longevity. It is highly effective at managing chip control in difficult materials, ensuring that chips are broken into manageable sizes, protecting both the workpiece and the indexable tool holder.
⭐⭐⭐⭐⭐ "Workhorse for our CNC Shop" - Mark R., USA "The US735 is the only grade we use for 304 and 316 stainless. It handles the toughness without the tip chipping out. Highly recommended."
⭐⭐⭐⭐⭐ "Authentic Japan Quality" - Dieter S., Germany "Original Mitsubishi inserts. The tool life is double that of the cheaper alternatives. Excellent for heavy stainless operations."
⭐⭐⭐⭐ "Great Chip Control" - Kenji T., Japan "Consistent performance across all 6 edges. The MA chipbreaker manages chips perfectly in our CNC lathes."
⭐⭐⭐⭐⭐ "Best Price for Original" - Liam J., Australia "Very fast shipping. The WNMG080408-MA is versatile for our general purpose turning on stainless shafts."
⭐⭐⭐⭐⭐ "Stable Performance" - Ricardo G., Brazil "US735 coating holds up well against thermal cracking. Even in interrupted cuts, the reliability is top-notch."
Technical Q&A
Q: Why use the W-shape (Trigon) insert?
A: The 80° trigon shape provides the strength of a square insert with the versatility of a rounder shape, offering 6 usable cutting edges total.
Q: Is this insert suitable for roughing stainless steel?
A: Yes, with a 0.8mm radius and the toughened US735 grade, it is ideal for medium to light roughing and general purpose turning.
Q: Does this work for continuous and interrupted cuts?
A: Absolutely. US735 is specifically engineered to resist the mechanical shock and thermal changes found in interrupted cutting.
Material Specialist Tip: US735 vs. MC7025
For General Stainless Steel turning where toughness is key, stick with US735. If you are doing high-speed continuous turning on stable parts, consider MC7025 for enhanced crater wear resistance.
Mitsubishi WNMG080408-MA US735 Carbide Turning Inserts for Stainless Steel
$92.26
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