Mitsubishi SNMG120404-MA UC5115 Turning Insert | Cast Iron Finishing
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SNMG120404-MA UC5115
Mitsubishi Materials | The Precision Standard for Cast Iron Machining
The Mitsubishi SNMG120404-MA UC5115 is a high-stability indexable turning insert designed specifically for cast iron finishing and medium cutting. Utilizing the specialized UC5115 CVD coating, this insert excels in the machining of gray cast iron (FC) and ductile iron (FCD). With its precise 0.4mm corner radius and MA chipbreaker, it provides the ultimate solution for operators requiring high dimensional accuracy and superior surface finish in challenging cast materials.
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 Chipbreaker
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") |
UC5115 Grade Advantage
The UC5115 grade is Mitsubishi's specialized CVD coated carbide for ISO K15-K25 materials. It features a robust TiCN + Al2O3 coating structure that provides exceptional heat resistance and suppresses thermal cracking. This makes it the "stable workhorse" for interrupted turning or machining ductile iron where mechanical shock is frequent.
MA Precision Geometry
The MA chipbreaker is a versatile medium-cutting geometry that excels in chip control. When paired with a 0.4mm radius, it provides lower cutting resistance, making it ideal for thin-walled parts or finishing passes. This geometry prevents chip entanglement and preserves the quality of your CNC turning projects.
Recommended Cutting Parameters
Starting Values for Cast Iron (UC5115)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 350 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Ductile Cast Iron (FCD) | 120 - 250 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
HOLDER COMPATIBILITY
Compatible with industry-standard PSSNR/L, DSBNR/L, or MSKNR/L 90° turning 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.