High-Toughness Cast Iron Specialist | MW Wiper Chipbreaker | Made in Japan
Product Overview
The Mitsubishi WNMG080408-MW UC5115 is a premium double-sided 80° trigon negative insert engineered for the most demanding Cast Iron turning applications. Featuring the legendary UC5115 CVD coating, this insert provides a unique combination of high hardness and extreme impact toughness, making it the ideal choice for interrupted cuts in gray and ductile iron. The MW wiper chipbreaker is optimized for medium-to-heavy cutting with high-feed capabilities, allowing you to achieve superior surface finishes even at double the feed rate on your CNC lathe.
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
MW Cast Wiper
Technical Specifications: Metric vs. Imperial
Technical Feature
Metric (ISO)
Imperial (ANSI)
Model Number
WNMG 080408-MW
WNMG 432-MW
Inscribed Circle (IC)
12.7 mm
0.500 inch
Corner Radius
0.8 mm
0.031 inch
Advanced Grade: UC5115 (The Tough Iron Specialist)
The UC5115 grade is Mitsubishi's dedicated solution for high-productivity Cast Iron turning. Unlike standard grades, UC5115 utilizes a specialized CVD coating that offers incredible resistance to thermal cracking and adhesive wear. This makes it exceptionally durable in heavy interrupted cutting and machining of parts with "sand pockets" or casting crust, ensuring a long and predictable tool life.
MW Wiper Geometry: Double the Productivity
The MW chipbreaker features a Wiper edge. In CNC machining, this allows you to either double your feed rate while maintaining the same surface finish, or achieve a significantly smoother finish at standard feed rates. It is the perfect indexable carbide insert for high-volume production of cast iron components like brake discs, engine blocks, and flywheels.
⭐⭐⭐⭐⭐ "Incredible Feed Rates" - Daniel M., USA "The MW wiper edge is a game changer. I've doubled my feed on G2 cast iron parts and the finish is still better than standard inserts."
⭐⭐⭐⭐⭐ "Handles Interrupted Cuts" - Stefan K., Germany "UC5115 is extremely tough. We have zero chipping issues on parts with heavy cross-holes. Very stable Japanese quality."
⭐⭐⭐⭐ "Great for Ductile Iron" - Takumi Y., Japan "Consistent performance on ductile iron. The tool life is very predictable, which is great for our production runs."
⭐⭐⭐⭐⭐ "Value for Money" - George P., UK "6 edges on a trigon insert is just smart economics. Paired with this durability, it's our shop's first choice for iron."
⭐⭐⭐⭐⭐ "Authentic Mitsubishi" - Ricardo G., Italy "Product arrived in original packaging. These perform exactly like the ones from our local distributor but at a better price."
Technical Q&A
Q: Can I use UC5115 for Steel?
A: UC5115 is optimized for Cast Iron (K-Class). For steel turning, we recommend UE6110 or MC6025 for the best performance.
Q: What is a Wiper (MW) insert?
A: A Wiper insert has a flattened contact area on the radius. This "wipes" the surface smooth, allowing for high-feed machining without sacrificing surface quality.
Q: How many cutting edges are available?
A: WNMG is a double-sided trigon, providing a total of 6 usable cutting edges, making it highly cost-efficient.
Expert Machining Tip: UC5115 vs. MC5015
For Continuous High-Speed iron turning, MC5015 is your winner. For Heavy Interrupted Cuts or older machines where toughness is the priority, UC5115 is the better choice.
Mitsubishi WNMG080408-MW UC5115 Heavy Duty Cast Iron Turning Inserts (10pcs)
$92.26
Need Help With BEYOND Inserts?
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When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
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