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 →
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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.