Mitsubishi SNMG120408-MS US735 Turning Insert | Stainless Steel Finishing
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SNMG120408-MS US735
Mitsubishi Materials | The Specialist for Tough Stainless & Precision Finishing
The Mitsubishi SNMG120408-MS US735 is a high-toughness indexable turning insert specifically engineered for stainless steel machining where edge security is the highest priority. Combining the ultra-tough US735 CVD coating with the precision MS chipbreaker, this insert excels in finishing-to-medium applications involving interrupted cutting and unstable setups. It is the premier choice for suppressing vibration and preventing notched wear in austenitic stainless steels.
Condition: 100% Genuine Mitsubishi | Pack of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Double Sided
12.7mm Size
4.76mm Thick
0.8mm Radius
Stainless Fin.
Technical Specifications
| Dimension | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120408-MS | SNMG 432-MS |
| Inscribed Circle ($IC$) | 12.7 mm | 0.500" (1/2") |
| Thickness ($S$) | 4.76 mm | 0.187" (3/16") |
| Corner Radius ($RE$) | 0.8 mm | 0.031" (1/32") |
US735 Grade: Built for Impact
The US735 grade is a specialized CVD coated carbide designed for the heavy mechanical and thermal shock of stainless steel turning. Its unique substrate offers exceptional resistance to thermal cracking, making it the primary choice for interrupted cutting of tough alloys where standard grades often chip or shatter.
MS Chipbreaker Geometry
The MS chipbreaker is an anti-vibration geometry that minimizes cutting resistance. By reducing the load on the cutting edge, it prevents work hardening on the workpiece surface. This is critical for 300-series stainless steels. It delivers superior chip control and excellent surface finish even in long-reach or low-rigidity applications.
Recommended Cutting Parameters
Optimized for ISO M Stainless Steel (US735)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Austenitic (304, 316) | 80 - 180 m/min | 0.10 - 0.25 mm/rev | 0.5 - 3.0 mm |
| Duplex Stainless | 60 - 130 m/min | 0.10 - 0.20 mm/rev | 0.5 - 2.5 mm |
HOLDER COMPATIBILITY
Matches with standard PSSNR/L, DSBNR/L, or MSKNR/L 90° turning tool holders.
View Matching Holders →
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.