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.
View Tool 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.