Mitsubishi SNMG120408-MA US735 Turning Insert | Stainless Steel
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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.
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