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.