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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Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.