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.
Shop Matching Holders →
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This Mitsubishi insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.