Mitsubishi CNMG120404-MS UE6020 Steel Finishing Insert (10pcs)
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CNMG120404-MS UE6020
Steel Finishing Specialist | UE6020 Tough CVD | MS Precision Geometry
Precision Performance for Steel Applications
UE6020 Grade (The Versatile Toughness): The UE6020 is a specialized CVD-coated grade optimized for P-Class (Steel). It provides an excellent balance of wear resistance and fracture toughness. This grade is particularly effective in general turning where the machine setup may not be perfectly rigid, or when encountering light interruptions in the cut.
MS Chipbreaker (The Sharp Edge): The MS geometry is a high-sharpness chipbreaker designed specifically for finishing. It features a positive rake angle that reduces cutting forces and minimizes heat generation at the tip. This is critical for maintaining dimensional accuracy and achieving a superior surface finish on soft and medium-carbon steels.
0.4mm (1/64") Precision Radius: The small corner radius is the secret to high-precision work. It reduces radial cutting pressure, which prevents vibration (chatter) on slender workpieces or thin-walled tubes, allowing for exceptionally clean finishes.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404-MS | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431-MS | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Optimized for finishing. Use coolant to maximize surface quality and prolong PVD/CVD life.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045) | 180 - 320 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Alloy Steel (4140) | 150 - 280 m/min | 0.08 - 0.18 mm/r | 0.20 - 1.20 mm |
Recommended Tool Holders
Ensure high precision with DCLNR/L 12 series external holders:
Shop DCLNR 12 HoldersPro-Tip: UE6020 vs. MC6015
UE6020 (The Tough One): Use this grade for general-purpose steel machining. It is more forgiving than MC6015 and better for older machines or less stable setups.
MS vs. MA Chipbreaker: Always choose MS for final finishing where depth of cut is shallow. If you need to do light roughing or medium cutting, the MA chipbreaker is a better fit.
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