Mitsubishi SNMG120404-MA US735 Turning Insert | Stainless Steel
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SNMG120404-MA US735
Mitsubishi Materials | The Stainless Steel & Tough-Cut Specialist
The Mitsubishi SNMG120404-MA US735 is a high-toughness indexable turning insert specifically engineered for stainless steel machining. Featuring the specialized US735 CVD coating, this insert excels in preventing built-up edge (BUE) and resisting thermal shock. It is the premier choice for interrupted cutting and machining difficult-to-cut materials like austenitic stainless steel, where edge strength is paramount.
Packaging: 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
0.4mm Radius
Medium-Cut
Technical Specifications
| Dimension | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120404-MA | SNMG 431-MA |
| 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 Advantage
The US735 grade is a dedicated CVD coated carbide for stainless steel (ISO M). It is optimized for low-to-medium speed turning where tool toughness is the primary concern. Its multi-layer coating provides a strong barrier against the sticky nature of stainless alloys, effectively reducing notching and edge chipping during heavy or interrupted cuts.
MA Chipbreaker Geometry
The MA chipbreaker is a versatile medium-cutting geometry with a positive land. This design ensures low cutting resistance while maintaining a strong edge. For stainless steel applications, the MA geometry provides superior chip control, breaking tough, stringy chips into manageable sizes to protect the workpiece surface and the CNC operator.
Recommended Cutting Parameters
Starting Data for Stainless Steel (US735)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Austenitic Stainless (304/316) | 80 - 180 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Duplex Stainless Steel | 60 - 140 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
HOLDER COMPATIBILITY
Pairs with standard PSSNR/L, DSBNR/L, or MSKNR/L 90° turning tool holders.
View Compatible Holders →