Mitsubishi SNMG120408-MA US735 Turning Insert | Stainless Steel
Price shown is a starting point. Contact us for a precise quote based on your requirements.
SNMG120408-MA US735
Mitsubishi Materials | The Specialist for Stainless Steel & Interrupted Cutting
The Mitsubishi SNMG120408-MA US735 is a high-performance indexable carbide insert specifically engineered for stainless steel machining. Featuring the high-toughness US735 CVD coating, this insert excels in environments where thermal shock and mechanical impact are prevalent. It is the premier choice for ISO M-class materials and interrupted cutting of tough alloys, providing unmatched edge stability and resistance to built-up edge (BUE).
Condition: 100% Genuine Mitsubishi | Box of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Double Sided
12.7mm Size
4.76mm Thick
0.8mm Radius
Medium-Cut
Technical Specifications
| Dimension | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120408-MA | SNMG 432-MA |
| 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 Tough-Coating Technology
The US735 grade is Mitsubishi's benchmark for machining stainless steel. This CVD coated carbide is formulated with a highly fracture-resistant substrate. The coating provides exceptional lubricity, which is essential for preventing the "sticky" chips of 304/316 stainless from welding to the cutting edge, thereby extending tool life in difficult CNC turning cycles.
MA Chipbreaker Geometry
The MA chipbreaker is an all-purpose medium-cutting design. It features a unique land profile that balances edge strength with low cutting resistance. This is critical for stainless steel, where excessive heat and pressure can lead to work hardening. The MA geometry ensures consistent chip control and prevents stringy chips from scratching the workpiece surface.
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 | 0.15 - 0.40 mm/rev | 1.0 - 4.0 mm |
| Ferritic/Martensitic | 100 - 220 m/min | 0.15 - 0.35 mm/rev | 1.0 - 3.5 mm |
SYSTEM COMPATIBILITY
Matches with standard PSSNR/L, DSBNR/L, or MSKNR/L 90° turning tool holders.
View Tool 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.