Mitsubishi SNMG120412 UC5115 Turning Insert | Cast Iron Specialist
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SNMG120412 UC5115
Mitsubishi Materials | Heavy-Duty Roughing & Interrupted Cutting for Cast Iron
The Mitsubishi SNMG120412 UC5115 is a high-toughness indexable turning insert engineered for the most demanding cast iron turning applications. Featuring a reinforced 1.2mm corner radius and the specialized UC5115 CVD coating, this insert excels in heavy-duty roughing and interrupted cutting of gray and ductile iron. It is the industry standard for maintaining dimensional stability when machining components with casting scale or sand inclusions.
Packaging: Original Mitsubishi Materials Box of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Double Sided
12.7mm Size
4.76mm Thick
1.2mm Radius
Technical Specifications
| Feature | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120412 | SNMG 433 |
| Inscribed Circle ($IC$) | 12.7 mm | 0.500" (1/2") |
| Thickness ($S$) | 4.76 mm | 0.187" (3/16") |
| Corner Radius ($RE$) | 1.2 mm | 0.047" (3/64") |
UC5115 CVD Grade
The UC5115 grade is a specialized CVD-coated carbide designed for ISO K15-K25 applications. It features a thick, heat-resistant Al2O3 layer and a specialized TiCN layer that significantly improves edge security. This material is the preferred choice for interrupted turning of ductile iron, where mechanical shock and thermal cracking are major causes of tool failure.
MA Heavy-Roughing Geometry
The SNMG geometry offers 8 cutting edges for maximum efficiency. The 1.2mm radius provides exceptional strength for high-feed turning. Mitsubishi's MA chipbreaker (or standard roughing geometry) is designed for medium to heavy depths of cut, ensuring excellent chip control and reducing the heat transferred to the workpiece in CNC lathe operations.
Recommended Cutting Parameters
Optimized for Cast Iron Roughing (UC5115)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 350 m/min | 0.25 - 0.60 mm/rev | 1.5 - 5.0 mm |
| Ductile Cast Iron (FCD) | 120 - 250 m/min | 0.20 - 0.50 mm/rev | 1.5 - 4.0 mm |
TOOL HOLDER COMPATIBILITY
Pairs with standard PSSNR/L, DSBNR/L, or MSKNR/L 90° turning tool holders.
Shop 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.