Mitsubishi SCMT120404 UE6020 Carbide Insert | MMC Japan Genuine
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SCMT120404 UE6020
Mitsubishi Materials | General Purpose Steel Machining Specialist
The Mitsubishi SCMT120404 UE6020 is a highly versatile indexable turning insert engineered for stable performance across a wide range of steel machining applications. Featuring the tough UE6020 CVD coating, this insert excels in both continuous and slightly interrupted CNC turning of carbon and alloy steels. Its 0.4mm nose radius provides precision for finishing while maintaining the structural integrity needed for medium-duty precision machining.
ISO Designation Decoded
Square 90°
7° Relief Angle
M-Class Tolerance
Countersink Hole
12.7mm Size
4.76mm Thick
0.4mm Radius
Technical Specifications
| Feature | Metric Designation | Inch (ANSI) Designation |
|---|---|---|
| Model Name | SCMT120404 | SCMT 431 |
| Inscribed Circle ($IC$) | 12.7 mm | 1/2" |
| Thickness ($S$) | 4.76 mm | 3/16" |
| Nose Radius ($R_e$) | 0.4 mm | 1/64" |
UE6020 Grade Strength
The UE6020 grade is a flagship CVD (Chemical Vapor Deposition) coating optimized for P-class materials. It features a robust multi-layer coating that balances wear resistance and fracture toughness. This makes it the first choice for general steel turning, providing stability even in unpredictable conditions or when machining parts with slight variations in hardness.
Precision Finishing Geometry
As an S-Type (Square) insert with a 90° angle, it provides a very strong edge. The 04 (0.4mm) radius is specifically designed for finishing work, helping to achieve tight tolerances and superior surface finish. The positive rake angle reduces cutting resistance, preventing workpiece deformation on thinner parts.
Recommended Cutting Parameters
General Steel Turning (P20 - P35)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Mild Steel / Low Carbon | 150 - 300 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Alloy Steel (4140/8620) | 120 - 250 m/min | 0.08 - 0.20 mm/rev | 0.3 - 2.0 mm |
LATHE TOOL HOLDER COMPATIBILITY
The SCMT1204 series is designed for Mitsubishi SSDCN or SSBCR/L external turning holders and large boring bars.
Find Your Tool Holder →
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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.