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.
Shop 22mm Boring Bars →
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.