Mitsubishi SPMN120308 UTI20T | General Purpose Carbide Insert
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
SPMN120308 UTI20T
Mitsubishi Materials | The Workhorse of Conventional Machining
The Mitsubishi SPMN120308 UTI20T is a time-tested, general-purpose carbide insert renowned for its reliability in milling and turning operations. Utilizing the high-toughness UTI20T grade (PVD uncoated), this insert is specifically engineered to handle the demands of stainless steel, alloy steel, and cast iron. With its flat-top design and sharp cutting edge, it provides excellent stability in manual and CNC setups.
Genuine Mitsubishi Carbide | Box of 10 Inserts
Code Specification Decoded
Square Shape
11° Relief Angle
M-Class Tolerance
No Chipbreaker
12.7mm IC
3.18mm Thick
0.8mm Radius
Unit Comparison Table
| Dimension | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SPMN120308 | SPMN 422 |
| Width (IC) | 12.7 mm | 0.500" |
| Thickness (S) | 3.18 mm | 0.125" |
| Radius (RE) | 0.8 mm | 0.031" |
UTI20T: The Tough Grade
The UTI20T grade is a non-coated carbide alloy that offers a perfect balance of wear resistance and fracture toughness. It is the go-to grade for general milling where vibration or intermittent cutting may occur. This grade excels in stainless steel machining and produces stable results in Cast Iron (ISO K) and carbon steels.
Flat-Top (No Chipbreaker)
As an "N" type insert, the SPMN has no molded chipbreaker on the top face. This provides a high-strength cutting edge designed for light-to-medium loads. It is ideal for conventional face milling where the chip formation is naturally controlled by the tool's approach angle, or for use in legacy tool holders with mechanical chip deflectors.
Milling & Turning Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Stainless Steel (304/316) | 80 - 150 m/min | 0.1 - 0.3 mm/rev | 0.5 - 3.5 mm |
| Gray Cast Iron | 100 - 180 m/min | 0.15 - 0.4 mm/rev | 1.0 - 4.0 mm |
COMPATIBLE TOOLING
Compatible with standard SPM 422 tool holders and conventional face mills.
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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.