Mitsubishi SNMG120404-MS US735 Turning Insert | Stainless Steel Finishing
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SNMG120404-MS US735
Mitsubishi Materials | The Specialist for Tough Stainless & Interrupted Finishing
The Mitsubishi SNMG120404-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
0.4mm Radius
Stainless Fin.
Technical Specifications
| Dimension | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120404-MS | SNMG 431-MS |
| Inscribed Circle ($IC$) | 12.7 mm | 0.500" (1/2") |
| Thickness ($S$) | 4.76 mm | 0.187" (3/16") |
| Corner Radius ($RE$) | 0.4 mm | 0.016" (1/64") |
US735 Grade: Built for Impact
The US735 grade is a specialized CVD coated carbide specifically for stainless steel turning (ISO M). It is optimized for tough cutting conditions, featuring a substrate that absorbs impact. It is the first choice for interrupted cuts where thermal shock and mechanical stress often cause premature edge failure in harder grades.
MS Chipbreaker: Low Resistance
The MS chipbreaker is a "medium-finish" geometry that prioritizes low cutting resistance. This design helps in preventing the work hardening of the workpiece surface—a common issue when CNC turning 304/316 stainless steel. It ensures stable chip control and excellent surface Ra values, even in low-rigidity setups.
Recommended Cutting Parameters
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Austenitic Stainless (304, 316) | 80 - 180 m/min | 0.08 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Duplex Stainless Steel | 60 - 140 m/min | 0.08 - 0.20 mm/rev | 0.5 - 2.0 mm |
HOLDER COMPATIBILITY
Pairs with standard PSSNR/L, DSBNR/L, or MSKNR/L 90° turning tool holders.
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