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 →
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This Mitsubishi insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
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.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.