Mitsubishi TNMG220408 UC5115 | Heavy-Duty Cast Iron Insert
30-Day Free Returns
Free Worldwide Shipping
TNMG220408 UC5115
Mitsubishi Materials | The Heavy-Duty Cast Iron Powerhouse
The Mitsubishi TNMG220408 UC5115 is a large-format CVD coated carbide insert designed for high-performance turning of Gray and Ductile Cast Iron. Utilizing the UC5115 grade with an ultra-thick thermal barrier coating, this insert provides industry-leading flank wear resistance. As a long-tail precision tool for large CNC lathes, it is optimized for stable turning of abrasive cast surfaces where smaller inserts fail to provide sufficient tool life.
K-Class Turning | Size 22 Robustness | Thick Alumina Coating
Code Identification Breakdown
Triangular Shape
0° Relief Angle
M-Class Tolerance
Cylindrical Hole
22mm Edge
4.76mm Thick
0.8mm Radius
Global Standard Comparison
| Specification | ISO (Metric) | ANSI (Inch) Equivalent |
|---|---|---|
| Model Number | TNMG220408 | TNMG 432 |
| Inscribed Circle (IC) | 12.7 mm | 0.500" |
| Nose Radius (RE) | 0.8 mm | 0.031" |
UC5115 Grade Performance
The UC5115 grade is a specialized CVD turning insert technology featuring Mitsubishi's exclusive coating adhesion treatment. It provides superior heat resistance for high-speed cast iron turning. The thick Alumina layer acts as a thermal shield, extending tool life in abrasive gray and ductile iron environments.
Size 22 Robust Geometry
The TNMG 6-edged insert at the Size 22 (12.7mm IC) platform offers massive edge strength. This indexable turning insert is built for larger workpieces, providing a high heat-sink capacity and preventing the thermal cracking common in smaller geometry inserts during long finishing passes.
Recommended Cutting Parameters
| Material Group | Speed ($v_c$) | Feed per Rev ($f$) | DOC ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC300) | 180 - 450 m/min | 0.20 - 0.50 mm/rev | 1.0 - 5.0 mm |
| Ductile Cast Iron (FCD) | 120 - 350 m/min | 0.15 - 0.40 mm/rev | 1.0 - 4.5 mm |
TOOL HOLDER COMPATIBILITY
Optimized for high-rigidity MTJNR/L or WTJNR/L tool holders (Size 22).
Shop Size 22 Tool Holders →