Mitsubishi CNMG190612-MA UE6020 Heavy Duty Steel Turning Insert (10pcs)
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CNMG190612-MA UE6020
The Steel Roughing Titan | UE6020 CVD Grade | Large-Scale Heavy Machining
Built for Maximum Metal Removal Rates (MRR)
UE6020 Grade (CVD Mastery): The UE6020 is Mitsubishi’s premier CVD-coated grade for P-Class (Steel). In large-scale roughing, heat management is critical. The thick Alumina layer provides a superior thermal barrier, preventing plastic deformation of the carbide substrate during long, aggressive cuts in carbon, alloy, and tool steels.
MA Chipbreaker (Heavy-Medium Duty): The MA geometry is optimized for medium-to-heavy turning. Its design balances a sharp shearing action to lower cutting forces with a reinforced land area that prevents edge chipping when encountering surface scale or rough-cast skins on large workpieces.
1.2mm (3/64") Radius Security: The 12 radius is the standard for heavy roughing. It offers the perfect trade-off between corner strength and radial cutting force, allowing for high feed rates while maintaining structural integrity during interrupted cuts.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG190612-MA | 19.05 mm | 6.35 mm | 1.20 mm |
| Imperial | CNMG643-MA | 3/4" | 1/4" | 0.0472" (3/64") |
Heavy-Duty Cutting Parameters
*Large diameter workpieces require stable RPM management. Use heavy flood coolant for best tool life.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045/S45C) | 140 - 320 m/min | 0.25 - 0.65 mm/r | 1.50 - 8.00 mm |
| Alloy Steel (4140/SCM440) | 110 - 260 m/min | 0.20 - 0.50 mm/r | 1.50 - 6.00 mm |
Heavy-Duty Tool Holders
Maximum performance for DCLNR/L 19 or MCLNR/L 19 series (3232 or 4040 shank sizes recommended):
Shop DCLNR 19 HoldersPro-Tip: When to upgrade to CNMG1906?
Stability is Key: If your CNMG1204 inserts are fracturing due to high cutting forces or heat saturation in large parts, the 1906 series offers 35% more thickness to dissipate heat and absorb vibration.
UE6020 vs. MC6025: UE6020 remains the benchmark for reliability in roughing. Use it when the material surface is unpredictable (forgings/castings). Switch to MC6025 only for clean, continuous bars at higher speeds.
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