Mitsubishi CNMG120408-MS US735 Stainless Steel Turning Insert (10pcs)
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CNMG120408-MS US735
The Stainless Powerhouse | US735 Tough PVD | MS Chip Control Geometry
Optimized for Tough, Gummy Materials
US735 Grade (Impact & Thermal Specialist): The US735 is a premium PVD-coated grade designed to solve the most common problems in M-Class (Stainless Steel) machining. Its substrate is engineered for high impact strength, making it the top choice for interrupted cuts or applications where thermal cracking typically occurs. The thin, tough PVD coating allows the edge to remain sharp while resisting the chemical wear inherent in stainless alloys.
MS Chipbreaker (Stainless Logic): The MS geometry is specifically designed to handle the high ductility of stainless steel. It features a large rake angle and a unique chip-pocket design that forces chips to break even at lower feeds, preventing the dreaded "long stringers" that can damage workpieces and tool holders.
0.8mm (1/32") Balanced Radius: The 08 radius is the perfect "middle-ground" for any machine shop. It is strong enough for light-to-medium roughing and sharp enough to provide an excellent industrial surface finish on a wide variety of alloyed steels.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-MS | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-MS | 1/2" | 3/16" | 0.0315" (1/32") |
High-Toughness Cutting Parameters
*The US735 grade is optimized for reliability. Use flood coolant to prevent edge welding in stainless steel applications.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 70 - 160 m/min | 0.10 - 0.30 mm/r | 0.50 - 3.50 mm |
| Alloy Steels (High Strength) | 100 - 180 m/min | 0.12 - 0.35 mm/r | 0.80 - 4.00 mm |
Compatible Tool Holders
Maximum rigidity is recommended for stainless steel. Fits DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: US735 vs. VP15TF
US735 (The Tough Specialist): This is your primary choice for interrupted cuts and unstable machine conditions in stainless steel. It prioritizes toughness over pure speed.
VP15TF (The Speed Specialist): Switch to VP15TF for continuous, high-speed turning in stable conditions. VP15TF offers slightly higher wear resistance but is more prone to chipping in heavy interruptions.
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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.