Mitsubishi SNMG120408 UC5115 Turning Insert | Cast Iron Grade
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SNMG120408 UC5115
Mitsubishi Materials | The Toughness Standard for Cast Iron Turning
The Mitsubishi SNMG120408 UC5115 is a high-reliability indexable turning insert designed for the diverse challenges of cast iron machining. Utilizing the UC5115 CVD coating, this insert is the premier choice for interrupted cutting and general-purpose turning of gray cast iron (FC) and ductile iron (FCD). Its specialized coating provides a shield against thermal cracking, making it a "stable workhorse" for high-volume CNC turning where part consistency is paramount.
Packaging: 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
Technical Specifications
| Feature | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120408 | SNMG 432 |
| 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 Toughness Grade
The UC5115 grade is a specialized CVD-coated carbide designed for ISO K15-K25 applications. While UC5105 focuses on speed, UC5115 focuses on edge security. It features a robust TiCN + Al2O3 coating layer that resists thermal shock and mechanical impact, making it ideal for turning cast iron parts with scale, sand inclusions, or interrupted surfaces.
SNMG Precision Chip Control
The SNMG geometry provides a strong square profile with 8 cutting edges for maximum economy. The 0.8mm radius is the industry's most versatile choice for medium roughing to semi-finishing. This geometry ensures a balanced cutting resistance, reducing chatter on less stable machines while maintaining a high-quality surface finish.
Recommended Cutting Parameters
General Application Guide (UC5115 Stable Turning)
| Material Group | 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 - 4.5 mm |
| Ductile Cast Iron (FCD) | 120 - 250 m/min | 0.15 - 0.40 mm/rev | 1.0 - 4.0 mm |
HOLDER COMPATIBILITY
Compatible with industry-standard PSSNR/L, DSBNR/L, or MSKNR/L 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.