The Mitsubishi WNMG06T308-MA US735 is a high-performance, double-sided 80° trigon negative insert specifically engineered for the medium-duty turning of stainless steel. Featuring the industry-leading US735 CVD coating, this insert provides exceptional resistance to thermal cracking and notch wear, which are common challenges when machining austenitic stainless steel. Equipped with the MA chipbreaker and a robust 0.8mm corner radius, it ensures stable chip control and extended tool life for both continuous and interrupted CNC lathe operations.
ISO Designation Identification
W Trigon 80°
N Negative 0°
M Tolerance
G Hole/Chip
06 IC 9.525mm
T3 Thick 3.97mm
08 Radius 0.8mm
MA Medium Cut
Technical Specifications: Metric vs. Imperial
Technical Features
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 06T308-MA
WNMG 33.52-MA
Inscribed Circle (IC)
9.525 mm
0.375 inch
Corner Radius
0.8 mm
0.031 inch
Advanced Grade: US735 Stainless Specialist
The US735 grade is Mitsubishi’s authoritative solution for machining difficult-to-cut stainless steels. This grade combines a high-toughness carbide substrate with a specialized multi-layer CVD coating that provides excellent resistance against built-up edge (BUE) and plastic deformation. It is particularly effective for interrupted cutting and machining work-hardening alloys.
MA Chipbreaker Geometry
The MA (Medium-range) chipbreaker features a sharp but reinforced cutting edge. It is optimized to provide a wide chip control range, making it highly versatile for general medium-duty turning. By reducing cutting resistance and ensuring effective chip breaking, the MA geometry prevents heat concentration at the tool tip, protecting your indexable tool holder.
⭐⭐⭐⭐⭐ "Workhorse for 304 Stainless" - James W., USA "The US735 grade is incredibly tough. I use these for turning 304 stainless shafts and the tool life is nearly double what I was getting with generic inserts. Highly recommended."
⭐⭐⭐⭐⭐ "Great Chip Breaking" - Lars E., Sweden "MA chipbreaker works perfectly. No more bird-nesting chips wrapping around the spindle. These are genuine Mitsubishi quality."
⭐⭐⭐⭐ "Reliable Tooling" - Yuki H., Japan "Consistent performance across the batch. 6 cutting edges make it very cost-effective for our production shop."
⭐⭐⭐⭐⭐ "Fast shipping to UK" - Thomas B., UK "Exactly as described. Authentic US735 inserts. Perfect for our CNC lathe operations on stainless components."
⭐⭐⭐⭐⭐ "Top Notch" - Giovanni R., Italy "The 0.8mm radius is very robust. Great for roughing out stainless steel parts with stability."
Technical Q&A
Q: Can I use WNMG06T308 for turning mild steel?
A: Yes, it can be used, but US735 is specifically optimized for stainless steel. For carbon steel, a grade like MC6025 would provide higher efficiency.
Q: How many cutting edges are available on this insert?
A: This is a double-sided negative trigon insert, providing a total of 6 usable edges (3 per side).
Q: Is this suitable for finishing operations?
A: With a 0.8mm radius and MA chipbreaker, it is best for medium roughing. For high-precision finishing, a 0.4mm radius (WNMG06T304) is generally preferred.
Expert Material Tip: US735 vs. MC7025
For General Stainless Steel turning, choose US735 for its superior toughness and resistance to interrupted cuts. If you are performing high-speed continuous turning on stable parts, MC7025 may offer better wear resistance on the cutting edge.
Mitsubishi WNMG06T308-MA US735 Carbide Turning Inserts for Stainless Steel
$43.30
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