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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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.