Mitsubishi TPMN220408 UTI20T | Heavy-Duty Uncoated Carbide Insert
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TPMN220408 UTI20T
Mitsubishi Materials | Heavy-Duty Uncoated Carbide Specialist
Maximum Edge Toughness for Large-Scale Machining
The Mitsubishi TPMN220408 UTI20T is a powerhouse uncoated carbide insert designed for stability in heavy-duty applications. The UTI20T grade is a classic P-M-K universal carbide known for its extreme resistance to thermal cracking and edge chipping. Featuring a massive 22mm edge and a robust 0.8mm corner radius, this long-tail heavy boring tool is the industrial standard for machining Gray Cast Iron, Ductile Iron, and high-silicon Aluminum alloys.
UTI20T Classic Grade | TPMN Flat-Top Strength | Heavy-Duty 22mm Scale
Technical Code Identification
Triangular Shape
11° Positive Relief
M-Class Tolerance
Flat-Top (No Chipbreaker)
22mm Edge Length
4.76mm Thick
0.8mm Radius
Uncoated Grade
ISO (Metric) vs ANSI (Inch) Comparison
| Feature Spec | ISO (Metric) | ANSI (Inch Equivalent) |
|---|---|---|
| Model Number | TPMN220408 | TPMN 432 |
| Inscribed Circle (IC) | 12.7 mm | 0.500" (1/2") |
| Thickness | 4.76 mm | 0.187" (3/16") |
UTI20T Grade Performance
The UTI20T uncoated carbide is a versatile "workhorse" grade. It is specifically formulated for high red-hardness and toughness. This makes it exceptionally reliable when machining Cast Iron (K-Group) and Non-Ferrous metals (N-Group). Its uncoated nature provides a sharper cutting edge than coated tools, which is essential for reducing cutting pressure in large-diameter boring.
TPMN Flat-Top Geometry
The TPMN series features a flat-top (no chipbreaker) face. This geometry provides the maximum physical support for the cutting edge, allowing the carbide insert to withstand heavy impacts and varied depths of cut. It is ideal for materials that naturally break chips, such as Gray Cast Iron, or for heavy roughing passes in Aluminum.
Recommended Cutting Parameters
| Material Group | Speed ($v_c$) | Feed ($f$) | DOC ($a_p$) |
|---|---|---|---|
| Gray Cast Iron | 50 - 140 m/min | 0.15 - 0.45 mm/rev | 0.5 - 4.0 mm |
| Aluminum Alloys | 150 - 500 m/min | 0.10 - 0.35 mm/rev | 0.2 - 5.0 mm |
COMPATIBLE HOLDERS
Designed for high-rigidity CTGPR/L 22 or CTFPR/L 22 heavy-duty holders.
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