Cast Iron Machining Specialist | MK Medium Chipbreaker | Made in Japan
Product Overview
The Mitsubishi WNMG080408-MK MC5015 is a high-performance double-sided 80° trigon negative insert precision-engineered for Cast Iron turning. Featuring the specialized MC5015 CVD coating, this insert offers extreme wear resistance against the abrasive nature of gray and ductile iron. The MK chipbreaker is designed for medium cutting, ensuring this indexable carbide insert provides exceptional surface finishes and extended tool life even in high-speed CNC machining environments. Ideal for heavy-duty industrial components where reliability is paramount.
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
MK Cast Iron Med
Technical Specifications: Metric vs. Imperial
Technical Feature
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 080408-MK
WNMG 432-MK
Inscribed Circle (IC)
12.7 mm
0.500 inch
Corner Radius
0.8 mm
0.031 inch
Advanced Grade: MC5015 (The Cast Iron Expert)
The MC5015 grade is a specialized CVD coated carbide designed primarily for K-Class materials (Cast Iron). Its thick, hard coating provides a thermal barrier that resists the high heat generated during high-speed machining. This grade significantly reduces flank wear, which is the most common failure mode when turning abrasive cast iron, leading to ultra-stable precision machining.
MK Chipbreaker Geometry
The MK chipbreaker is specifically tuned for Cast Iron medium cutting. It features a stable land and optimized rake angle to handle the short, brittle chips typical of iron. In the CNC turning process, this geometry minimizes cutting resistance while maximizing edge strength, preventing chipping during interrupted cuts.
⭐⭐⭐⭐⭐ "Incredible Wear Resistance" - Mark T., USA "We turn ductile iron pulleys all day. These MC5015 inserts last 30% longer than our previous supplier's grade. Remarkable stability."
⭐⭐⭐⭐⭐ "Smooth Cutting" - Jürgen H., Germany "The MK chipbreaker handles cast iron beautifully. No edge chipping even with the hard crust on the castings."
⭐⭐⭐⭐ "Great Consistency" - Kenji S., Japan "Consistent Japanese quality. Very predictable tool life, which helps us automate our CNC shifts with confidence."
⭐⭐⭐⭐⭐ "Economic and Tough" - Liam W., Australia "6 usable edges on a trigon insert is a game changer for cost-per-part in iron turning. Highly recommend."
⭐⭐⭐⭐⭐ "Fast Shipping" - Piotr A., Poland "Authentic Mitsubishi inserts. Performance is exactly as stated in the manual. Perfect for our hydraulic component production."
Technical Q&A
Q: Can I use MC5015 for Steel?
A: While it can cut steel, it is optimized for Cast Iron (K-Class). For steel, UE6110 or MC6025 will offer better performance and economy.
Q: What is the benefit of the MK chipbreaker?
A: It provides excellent edge security and stability for medium turning of cast iron, preventing premature edge breakdown in abrasive conditions.
Q: How many edges does this insert have?
A: WNMG is a double-sided trigon, giving you 6 usable cutting edges, providing 50% more value than standard 4-edge diamond inserts.
Expert Machining Tip: MC5015 vs. UC5115
For High-Speed, Continuous iron turning, MC5015 is superior. For Heavy Interrupted Cuts or older machines with less stability, consider the UC5115 grade for its extreme toughness.
Mitsubishi WNMG080408-MK MC5015 Cast Iron Turning Carbide Inserts (10pcs/box)
$92.26
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