Korloy CCMT120408-C25 NC6210 High-Speed Cast Iron Turning Insert (10pcs)
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The Original Korloy CCMT120408-C25 NC6210 (ANSI Standard: CCMT 432) is a specialized CVD-coated carbide insert engineered specifically for the high-speed finishing of Cast Iron. While general-purpose inserts wear down quickly against the abrasive nature of iron, the NC6210 grade features a thick alumina coating that provides exceptional heat resistance and flank wear protection. Combined with the robust 0.8mm radius and sharp C25 chipbreaker, it delivers stable performance and high surface quality in both Gray and Ductile iron.
Cast Iron Specialist: NC6210 is designed to handle the high temperatures of dry machining in cast iron, offering significantly longer tool life than universal steel grades.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CCMT120408-C25 |
| ANSI Code | CCMT 432 |
| Grade | NC6210 (CVD Optimized for Cast Iron) |
| Nose Radius | 0.8 mm (1/32") - High Feed Strength |
Core Performance Benefits:
- Superior Abrasive Resistance: The thick CVD coating is specifically designed to resist the scratching effect of graphite and silicon particles found in cast iron.
- C25 Chip Control: The sharp rake angle reduces cutting pressure, which is critical for preventing "break-out" at the end of a cut in brittle cast iron materials.
- High Speed (Vc) Capability: Optimized for high-productivity machining, allowing for faster cycle times without sacrificing edge integrity.
- Robust R0.8 Radius: Provides extra strength for semi-finishing and finishing, allowing for higher feed rates while maintaining a good surface finish.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Gray Cast Iron (GG25 / HT250) | 250 - 500 m/min | 0.15 - 0.35 mm/rev | 0.5 - 3.0 mm |
| Ductile Cast Iron (GGG40 / QT400) | 150 - 300 m/min | 0.12 - 0.30 mm/rev | 0.5 - 2.5 mm |
Compatible Tool Holders:
Due to the higher feed rates of the R0.8 radius, we recommend rigid SCLCR/L type holders:
- External Turning: SCLCR2020K12 / SCLCR2525M12
- Boring Bars (Internal): S25S-SCLCR12 / S32T-SCLCR12
Cast Iron Grade Choice: NC6210 vs. NC6215
Selecting the right CVD grade for iron machining:
Primary choice for continuous high-speed finishing. Maximum wear resistance in Gray Iron.
Better for interrupted cuts or machining with heavy vibrations and scaly surfaces.
Machinist's Tip: Cast iron machining creates fine, abrasive dust. While NC6210 excels at dry cutting, ensuring proper chip evacuation is key to protecting your machine's ways.
Packaging: 10 pieces per box.
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.