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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Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.