Mitsubishi CNMG120412-MA UE6020 Carbide Insert for Heavy Steel Roughing (10pcs)
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CNMG120412-MA UE6020
Heavy Roughing Powerhouse | UE6020 CVD Grade | 1.2mm High-Strength Radius
Maximum Stability for Steel Roughing
UE6020 Grade (Advanced CVD Multi-Layer): The UE6020 is a specialized CVD-coated grade optimized for P-Class (Steel) materials. It features a thick, heat-resistant Alumina layer that acts as a shield against crater wear. This grade is legendary for maintaining cutting edge integrity during long, high-temperature roughing passes in Carbon Steel and Alloy Steel.
MA Chipbreaker (Medium-Heavy Duty): The MA geometry is designed to handle a wide range of cutting depths. On this 12-radius insert, the MA chipbreaker provides enough clearance to prevent chip packing during heavy cuts while remaining sharp enough to reduce the radial forces that cause deflection.
1.2mm (3/64") Reinforced Radius: The larger radius is the secret to this insert's durability. It distributes cutting heat over a wider area and provides a much stronger corner than the 08 or 04 versions, making it the ideal choice for interrupted cuts and high-feed roughing.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120412-MA | 12.7 mm | 4.76 mm | 1.20 mm |
| Imperial | CNMG433-MA | 1/2" | 3/16" | 0.0472" (3/64") |
Recommended Roughing Parameters
*The 1.2mm radius is designed for stability. Ensure your setup is rigid to prevent vibration at higher feed rates.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Low Carbon Steel (A36/1018) | 180 - 380 m/min | 0.25 - 0.60 mm/r | 1.20 - 5.50 mm |
| High Alloy Steel (4140/4340) | 130 - 300 m/min | 0.20 - 0.50 mm/r | 1.20 - 4.50 mm |
Compatible Tool Holders
Maximum performance for DCLNR/L 12 and MCLNR/L 12 roughing systems:
Shop DCLNR 12 HoldersPro-Tip: UE6020 vs. MC6015
UE6020 (The Tough One): Perfect for heavy roughing, rough casting skins, and interrupted cuts. It prioritize edge toughness to prevent chipping.
MC6015 (The Speed Specialist): Better for high-speed finishing or light-to-medium turning where pure wear resistance is needed to maintain surface finish over long runs.
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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.