Mitsubishi CNMG120404-MA UE6020 Carbide Insert for Steel Finishing (10pcs)
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CNMG120404-MA UE6020
Steel Finishing Specialist | UE6020 CVD Grade | Precision 0.4mm Radius
Optimized for Steel Precision
UE6020 Grade (CVD Coating): UE6020 is Mitsubishi’s premium CVD-coated grade optimized for P-Class (Steel) turning. It features a triple-layer coating (TiCN-Al2O3-TiN) that provides exceptional resistance to crater wear and plastic deformation. This grade is designed for stable, high-speed continuous turning where tool life consistency is paramount.
MA Chipbreaker (Finishing to Medium Cut): The MA geometry is engineered with a specialized chip-curling ridge. It excels at breaking chips at shallow depths of cut, which is critical during finishing passes to prevent surface scratching and "bird-nesting" on the workpiece.
0.4mm (1/64") Precision Radius: The 04 radius is the professional's choice for reducing cutting resistance. By minimizing the contact area between the tool and the part, it significantly reduces the risk of chatter in long-overhang boring or thin-walled turning.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404-MA | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431-MA | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Optimized for finishing. High speeds (Vc) are necessary to maximize the benefits of the CVD coating.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045 / S45C) | 180 - 350 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Alloy Steel (4140 / SCM440) | 150 - 300 m/min | 0.08 - 0.18 mm/r | 0.20 - 1.20 mm |
Required Tool Holders
Maximum clamping stability for DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UE6020 vs. VP15TF
UE6020 (Steel Master): Best for continuous steel turning at high speeds. The thick CVD coating offers superior tool life in dry or high-heat environments.
VP15TF (The Generalist): Choose VP15TF for interrupted cuts, stainless steel, or when you are alternating between multiple material types in small batches.
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