Mitsubishi CNMG120408-MA UC5115 Cast Iron Turning Insert (10pcs)
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CNMG120408-MA UC5115
The Cast Iron Specialist | UC5115 CVD Hardness | Abrasive Resistance Geometry
Engineered for Abrasive Environments
UC5115 Grade (Ultra-Hard CVD Coating): The UC5115 is Mitsubishi's flagship grade for K-Class (Cast Iron). Cast iron is notoriously abrasive, leading to rapid flank wear. The UC5115 substrate is paired with a specialized TiCN + Al2O3 coating that offers extreme hardness and thermal stability, ensuring the cutting edge remains sharp even when machining "crusty" castings.
MA Chipbreaker (The Multi-Material Standard): The MA geometry on this cast iron grade is designed for medium-range cutting. While cast iron typically produces short chips, the MA chipbreaker provides the necessary clearance to reduce cutting resistance and heat buildup at the tip, extending tool life during long production runs.
0.8mm (1/32") Universal Radius: The 08 radius is the industry standard for balancing edge toughness and surface finish. It provides enough mass to resist the high-frequency micro-impacts found in ductile iron turning while maintaining Ra quality for finishing passes.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-MA | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-MA | 1/2" | 3/16" | 0.0315" (1/32") |
Cast Iron Cutting Parameters
*Optimized for Dry Cutting. Cast iron typically does not require coolant; dry machining helps prevent thermal cracking of the CVD layer.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Grey Cast Iron (HT250 / G25) | 150 - 350 m/min | 0.15 - 0.45 mm/r | 0.50 - 4.50 mm |
| Ductile / Nodular Iron (QT450) | 120 - 280 m/min | 0.15 - 0.40 mm/r | 0.50 - 4.00 mm |
Recommended Tool Holders
Maximum rigidity for cast iron turning with DCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UC5115 vs. UE6020
UC5115 (The Iron Master): Specifically for Cast Iron. It is harder than steel grades to combat abrasion. Do not use for Steel as the cutting edge may be too brittle for the stringy chips.
Interrupted Cuts: If you are machining cast iron with heavy interruptions (like bolting flanges), ensure your machine is rigid. UC5115 loves high speeds but requires stability.
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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.