Mitsubishi SNMG120408-MA UC5115 Turning Insert | Cast Iron Specialist
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SNMG120408-MA UC5115
Mitsubishi Materials | The Industry Standard for Cast Iron Turning
The Mitsubishi SNMG120408-MA UC5115 is a premium indexable carbide insert engineered specifically for the high-efficiency machining of cast iron. Featuring the specialized UC5115 CVD coating, this insert provides an industry-leading balance of toughness and wear resistance. It is the primary recommendation for ISO K-class materials, including gray cast iron and ductile iron, delivering stable tool life in both continuous and slightly interrupted CNC turning operations.
Packaging: Genuine Mitsubishi Box of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Hole/Double Sided
12.7mm Size
4.76mm Thick
0.8mm Radius
Chipbreaker
Technical Specifications
| Feature | 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") |
UC5115 Carbide Grade
The UC5115 grade features Mitsubishi's "All-Black Super-Even Coat." This advanced CVD coating (TiCN + Al2O3) is specifically tuned for the thermal and mechanical demands of cast iron turning. It significantly suppresses flank wear and cratering, allowing for high-speed machining while maintaining exceptional fracture resistance in ductile iron.
MA Medium Chipbreaker
The MA chipbreaker is a double-sided, flat-top geometry optimized for medium cutting. It features a positive land that ensures a sharp cutting action, reducing cutting forces and vibration. This geometry is ideal for general-purpose turning, providing excellent chip control over a wide range of feed rates in both steel and cast iron.
Recommended Cutting Parameters
Optimized for UC5115 Cast Iron Grade
| Workpiece Material | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 350 m/min | 0.15 - 0.45 mm/rev | 1.0 - 4.0 mm |
| Ductile Cast Iron (FCD) | 120 - 250 m/min | 0.15 - 0.40 mm/rev | 1.0 - 3.5 mm |
COMPATIBLE TOOLING
Specifically designed for use with standard PSSNR/L, DSBNR/L, or MSKNR/L turning 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.