Mitsubishi TPMN160308 UTI20T | Uncoated Carbide Turning Insert
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TPMN160308 UTI20T
Mitsubishi Materials | Uncoated Carbide Tough-Grade Specialist
Rugged Reliability for Non-Ferrous & Cast Iron
The Mitsubishi TPMN160308 UTI20T is a specialized uncoated carbide insert built for stability in demanding materials. The UTI20T grade is renowned for its excellent balance of wear resistance and toughness, specifically when machining Cast Iron, Aluminum alloys, and Copper. With its 16mm triangular edge and robust 0.8mm corner radius, this long-tail industrial insert provides the sharp shearing action required for CNC boring where coated tools might suffer from edge-rounding or adhesion.
UTI20T Uncoated Grade | TPMN Flat-Top | High Thermal Shock Resistance
Technical Code Identification
Triangular Shape
11° Positive Relief
M-Class Tolerance
Flat-Top (No Chipbreaker)
16.5mm Edge Length
3.18mm Thick
0.8mm Radius
Uncoated Grade
ISO (Metric) vs ANSI (Inch) Comparison
| Feature Spec | ISO (Metric) | ANSI (Inch Equivalent) |
|---|---|---|
| Model Number | TPMN160308 | TPMN 322 |
| Inscribed Circle (IC) | 9.525 mm | 0.375" (3/8") |
| Corner Radius | 0.8 mm | 0.0315" (1/32") |
UTI20T Performance Grade
The UTI20T uncoated carbide is a versatile P-M-K grade. It is particularly effective in machining Gray Cast Iron and Ductile Iron due to its high resistance to edge chipping. In non-ferrous applications like Aluminum turning, the uncoated surface prevents "built-up edge" (BUE) adhesion, keeping the cutting action clean and the tool life predictable.
Robust TPMN Flat-Top Geometry
The TPMN geometry is a traditional flat-top design. By removing the molded chipbreaker, the insert gains massive edge strength. This is ideal for rough-to-finish boring in materials that produce short chips (like Cast Iron) or when using high-pressure coolant to manage long stringy chips in non-ferrous alloys.
Recommended Cutting Parameters
| Material | Speed ($v_c$) | Feed ($f$) | DOC ($a_p$) |
|---|---|---|---|
| Gray Cast Iron | 60 - 150 m/min | 0.10 - 0.30 mm/rev | 0.2 - 2.0 mm |
| Aluminum Alloys | 200 - 600 m/min | 0.10 - 0.25 mm/rev | 0.1 - 2.5 mm |
COMPATIBLE HOLDERS
Designed for high-rigidity CTFPR/L 16 or CTGPR/L 16 boring bars.
Shop 16mm 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.