Cast Iron Machining Specialist | High Wear Resistance | Made in Japan
Product Overview
The Mitsubishi WNMG080404 UC5115 is a high-performance double-sided 80° trigon insert specifically engineered for the demanding environment of Cast Iron turning (K-Class). Featuring the specialized UC5115 CVD coating, this insert excels in providing maximum wear resistance against the abrasive nature of gray and ductile cast iron. With a sharp 0.4mm corner radius, it is designed for precision machining and light to medium finishing passes. These indexable carbide inserts are a staple for CNC machining shops looking to increase tool life and productivity in industrial casting applications.
ISO Designation Identification
W Trigon 80°
N Negative 0°
M Tolerance
G Hole/Chip
08 IC 12.7mm
04 Thick 4.76mm
04 Rad 0.4mm
Technical Specifications: Metric vs. Imperial
Technical Feature
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 080404
WNMG 431
Inscribed Circle (IC)
12.7 mm
0.500 inch
Corner Radius
0.4 mm
0.016 inch
Grade: UC5115 (The Cast Iron Expert)
The UC5115 grade features a specialized CVD coating that targets the unique challenges of Cast Iron (K-Class) turning. Gray and ductile irons are highly abrasive and generate significant heat. UC5115 uses a tough carbide substrate paired with a coating that resists thermal cracking and flank wear, maintaining dimensional stability during long runs. This ensures that your CNC turning operations remain uninterrupted and cost-effective.
Precision 0.4mm Radius
The 0.4mm corner radius is perfect for finishing and semi-finishing passes. It minimizes cutting pressure and vibration, which is crucial for achieving high surface Ra quality on cast iron parts. When utilized in CNC machining, this geometry provides a clean cut and excellent chip management.
*Pro Tip: For gray cast iron, higher speeds (Vc) can be used to improve productivity. For ductile iron, keep speeds moderate to preserve edge toughness.*
⭐⭐⭐⭐⭐ "King of Cast Iron" - David L., USA "We struggle with flank wear on our ductile iron housings. Switched to UC5115 and tool life nearly doubled. Incredible quality."
⭐⭐⭐⭐⭐ "Stable and Fast" - Heiko M., Germany "Running these at 280 m/min on gray iron with zero issues. Mitsubishi is always consistent with their coatings."
⭐⭐⭐⭐ "Great Precision" - Kenji S., Japan "The 0.4mm radius is perfect for our final finishing passes. Very stable dimensions."
⭐⭐⭐⭐⭐ "Unbeatable ROI" - Steve B., UK "6 edges on a trigon insert designed specifically for iron. The cost-per-edge is fantastic for our shop."
⭐⭐⭐⭐⭐ "Authentic Product" - Pavel S., Czech Republic "Genuine Mitsubishi. Packaged well and arrived fast. These are the real deal for iron turning."
Technical Q&A
Q: Can I use UC5115 for Steel?
A: While it can cut steel, it is optimized for Cast Iron (K-Class). For steel applications, we recommend the MC6025 or UE6020 grades.
Q: Why is UC5115 better for iron?
A: It has a specialized layer that prevents the abrasive dust of cast iron from eating away the carbide substrate, which is the main cause of tool failure in iron turning.
Q: How many edges does the WNMG have?
A: The WNMG trigon shape is double-sided, giving you 6 usable cutting edges, making it 50% more economical than standard diamond inserts.
Expert Machining Tip: UC5115 vs. UC5105
Use UC5115 for versatile cast iron turning, including interrupted cuts. If you are doing continuous, Ultra-High-Speed turning on gray iron only, UC5105 offers even higher wear resistance.
Mitsubishi WNMG080404 UC5115 Carbide Turning Inserts for Cast Iron (10pcs)
$92.26
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