Mitsubishi CNMG120408-MA MC6025 Carbide Turning Insert for Steel (10pcs)
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CNMG120408-MA MC6025
The Universal Steel Master | Nano-Texture CVD Grade | MA Multi-Purpose Geometry
The New Standard in Steel Machining
MC6025 Grade (Nano-Texture CVD Technology): The MC6025 is Mitsubishi's next-generation grade for P-Class (Steel). It features a highly oriented crystal structure within the Alumina coating. This "Nano-Texture" provides twice the resistance to crater wear compared to traditional CVD grades while maintaining high fracture toughness, making it reliable for both continuous and light interrupted cuts.
MA Chipbreaker (Versatility Redefined): The MA geometry is a medium-cut specialist. It is designed to minimize cutting resistance while maintaining a strong edge. It provides excellent chip control across a broad range of feed rates, effectively breaking chips in everything from soft mild steels to tough alloy steels.
0.8mm (1/32") Industry Standard Radius: The 08 radius is the most popular choice for a reason. It offers the ideal trade-off: a strong enough corner to handle medium roughing and surface scale, and a fine enough point to leave a high-quality surface finish.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-MA | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-MA | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*Optimized for Universal Steel Turning. Suitable for dry machining or flood coolant.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Mild Steel (A36 / 1018) | 220 - 420 m/min | 0.15 - 0.45 mm/r | 0.80 - 4.50 mm |
| Alloy Steel (4140 / 4340) | 180 - 350 m/min | 0.15 - 0.35 mm/r | 0.80 - 3.50 mm |
Compatible Tool Holders
Ensure rigid clamping with DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: MC6025 vs. MC6015 vs. UE6020
MC6025 (The Balanced Choice): Your daily driver. Best for general purpose steel turning where you encounter mixed cuts (continuous and light interrupted).
MC6015 (The Speed Choice): Upgrade to MC6015 for pure speed in stable, continuous passes to maximize tool life.
UE6020 (The Toughness Choice): Downgrade to UE6020 only if you have heavy interruptions or very unstable setups where edge chipping is the main failure mode.
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