Mitsubishi CNMG120404-MS US735 Stainless Steel Finishing Insert (10pcs)
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CNMG120404-MS US735
Stainless Steel Specialist | US735 Tough PVD | MS Precision Finishing
Mastering Difficult-to-Cut Materials
US735 Grade (Toughness Champion): The US735 is a specialized PVD-coated grade specifically developed for M-Class (Stainless Steel). It is designed to withstand the thermal shock and mechanical stress of interrupted cutting. If you are struggling with edge chipping or premature failure in gummy materials, US735 provides the micro-toughness needed to keep the machine running.
MS Chipbreaker (Finishing Specialist): The MS geometry is a high-sharpness chipbreaker tailored for light cutting depths. It features a high rake angle that reduces cutting resistance and heat generation. This is critical for preventing "work hardening" on the surface of the workpiece, ensuring a mirror-like finish and dimensional accuracy.
0.4mm (1/64") Radius: The small corner radius is essential for finishing applications. It minimizes radial pressure, allowing for high-precision turning on slender parts or thin-walled components without causing vibration or deflection.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404-MS | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431-MS | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Optimized for finishing. Use plenty of coolant to extend the life of the PVD coating in stainless steel.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 80 - 150 m/min | 0.05 - 0.15 mm/r | 0.20 - 1.50 mm |
| Duplex Stainless Steel | 50 - 110 m/min | 0.08 - 0.18 mm/r | 0.30 - 1.20 mm |
Recommended Tool Holders
For vibration-free finishing, use DCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: US735 vs. VP15TF
US735 (The Tough Specialist): This is your best friend for heavy interruptions and low-rigidity machines. It is tougher and resists impact better than VP15TF.
MS vs. MA Chipbreaker: Use MS for final finishing where depth of cut is very shallow. If you are doing general medium cutting, stick with the MA geometry.
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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.