High-Strength Stainless Steel Turning Specialist | 100% Made in Japan
Product Overview
The Mitsubishi WNMG080412-MS US735 is a heavy-duty, double-sided 80° trigon negative insert precision-engineered for stainless steel turning. Optimized for demanding CNC machining environments, the US735 CVD coating provides exceptional resistance to thermal cracking and adhesive wear—common issues when cutting gummy austenitic or duplex stainless steels. Featuring a robust 1.2mm corner radius and the sharp MS chipbreaker, this indexable carbide insert offers maximum edge strength and superior chip control for medium-to-heavy duty precision turning.
ISO Designation Identification
W Trigon 80°
N Negative 0°
M Tolerance
G Hole/Chip
08 IC 12.7mm
04 Thick 4.76mm
12 Radius 1.2mm
MS Finishing
Technical Specifications: Metric vs. Imperial
Feature
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 080412-MS
WNMG 433-MS
Inscribed Circle (IC)
12.7 mm
0.500 inch
Corner Radius
1.2 mm
0.047 inch
Advanced Grade: US735 (The Stainless Master)
The US735 grade is Mitsubishi's benchmark for tough-to-machine stainless steel. It features a high-toughness carbide substrate combined with a specialized CVD coating that effectively manages high heat and prevents chemical wear. This grade is specifically designed to handle the abrasive nature of stainless while maintaining an incredibly stable cutting edge, preventing sudden chipping and extending tool life.
MS Chipbreaker Geometry
The MS (Medium-Sharp) chipbreaker is designed for light-to-medium cutting with high surface quality. Despite its sharp geometry, the 1.2mm radius on the WNMG080412 provides the structural integrity needed for heavy-duty turning. It excels at breaking chips in "gummy" materials like 304 and 316 stainless, preventing spindle entanglement during CNC turning.
⭐⭐⭐⭐⭐ "Tough Radius, Great Finish" - James H., UK "The 1.2mm radius is perfect for my roughing and semi-finishing passes on 304 stainless. Very durable grade."
⭐⭐⭐⭐⭐ "Reliable Tool Life" - Guenther F., Germany "Predictable wear. I can run these overnight with confidence. Authentic Japanese quality."
⭐⭐⭐⭐ "Great for Interrupted Cuts" - Hiroshi M., Japan "The US735 handles heat shocks extremely well. Even with light interruptions, the edge stays intact."
⭐⭐⭐⭐⭐ "Economical 6 Edges" - Liam O., Australia "WNMG shape gives 6 usable edges. When you factor in the tool life of US735, the cost per edge is unbeatable."
⭐⭐⭐⭐⭐ "Best for Stainless" - Pavel S., Poland "Highly recommended for CNC shops. Fast shipping and the inserts perform exactly like the catalog says."
Technical Q&A
Q: Why use a 1.2mm radius (12) over 0.8mm (08)?
A: The larger 1.2mm radius provides significantly higher edge strength and allows for higher feed rates, making it ideal for roughing stainless steel.
Q: Is this insert suitable for dry machining?
A: For stainless steel, wet machining with high-pressure coolant is highly recommended to prevent work hardening and to extend tool life.
Q: Can I use this for Duplex Stainless Steel?
A: Yes, US735 is an excellent grade for the high-strength and abrasive properties of Duplex materials.
Expert Machining Tip: US735 vs VP15TF
For High-Volume Stainless Production, use US735. For Universal Shop Flexibility across steel and heat-resistant alloys, consider VP15TF as a versatile alternative.
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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