Mitsubishi DNMG150404-MA US735 Carbide Insert for Stainless Steel
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DNMG150404-MA US735
Interrupted Cut Specialist | High-Toughness US735 | MA Precision Geometry
Built for the Toughest Machining Conditions
US735 Grade (High-Toughness PVD): The US735 is Mitsubishi's specialized grade for Stainless Steel machining. Unlike brittle high-speed grades, US735 uses a proprietary PVD coating over a high-toughness carbide substrate. This allows it to absorb the impact of interrupted cuts (like turning hex bars or shafts with keyways) and prevents micro-chipping in gummy 300-series stainless steels.
MA Chipbreaker (Precision Control): The MA geometry is designed for medium-finish applications. It features a unique rake angle that helps control the long, stringy chips common in stainless steel. For a 0.4mm radius insert, the MA chipbreaker ensures that cutting forces are kept low, preventing chatter on thin-walled parts.
0.4mm Radius (Tight Tolerance Finishing): The "04" (1/64") nose radius is optimized for precision. It allows for a smaller depth of cut while achieving a high-quality surface finish. It is the perfect choice when you need to maintain tight dimensional tolerances on critical stainless components.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | DNMG150404-MA | 12.70 mm | 4.76 mm | 0.40 mm |
| Imperial | DNMG431-MA | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*US735 excels at lower to medium speeds where toughness is the priority.
| Material Group | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 60 - 140 m/min | 0.05 - 0.20 mm/r | 0.20 - 2.00 mm |
| Martensitic Stainless (440C) | 80 - 150 m/min | 0.08 - 0.25 mm/r | 0.30 - 2.50 mm |
Compatible Tool Holders
For maximum tool life, use high-rigidity DDJNR/L holders:
Shop DDJNR 15 HoldersPro-Tip: US735 vs. VP15TF
US735 (The Heavy-Hitter): Your first choice for interrupted cuts or unstable machining conditions in stainless steel. It is built to take a beating without fracturing.
VP15TF (The Precision Expert): For continuous, high-speed CNC turning in stable conditions, switch to VP15TF. It is harder and more wear-resistant but more prone to breakage if the cut is heavily interrupted.
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