Login / Register
Verify OTP
Update Profile
Duracarb CNMA120408 DC820
The Duracarb CNMA120408 DC820 is a premium CVD-coated carbide insert designed for durable high-speed turning of cast iron and steel. With a 12.0 mm inscribed circle, 4.76 mm thickness and 0.8 mm corner radius, this reliable insert delivers less downtime, better surface finish and lower cost per component. Available now at India’s largest marketplace for carbide inserts.
Cut faster. Run longer. Spend less.
The Duracarb CNMA120408 DC820 is a high-performance CVD-coated carbide turning insert engineered to deliver exceptional productivity and tool life in cast iron and steel machining. Trusted by machinists across India, this insert combines Duracarb’s precision geometry with the advanced DC820 grade, ensuring consistent performance even under heavy-duty conditions.
Hook / Attention Line
Stop sacrificing tool life for speed—get both. With the Duracarb CNMA120408 DC820 insert, you’ll cut faster, run longer and slash cost per component.
Key Features & Specs
-
Geometry: ISO designation CNMA 120408 (inscribed circle ~12.0 mm, thickness 4.76 mm, corner radius 0.8 mm) as seen in the Duracarb catalogue.
Grade: DC820 – a CVD-coated turning grade engineered by Duracarb for cast iron and challenging steels. -
Coating & substrate: The DC820 grade uses an advanced alumina-based CVD coating process (improved wear- and shock-resistance) plus a refined surface finish to reduce friction and side/face wear.
-
Application: Primarily for turning, including medium to finishing operations on cast iron and low-to-medium alloy steels. Suitable in continuous as well as interrupted cuts
Why It’s a Best Seller
-
Longer tool life: Thanks to the upgraded alumina CVD coating of DC820 which delivers higher wear and chipping resistance even at higher speeds.
Better surface finish: The smoother top-surface treatment reduces cutting resistance and built up-edge, resulting in cleaner finishes and fewer re-works. -
Reduced downtime & cost per component: Less frequent insert changes, more stable operations and fewer rejects mean real savings. For example, test reports show improved tool life and cost savings using DC820 in cast-iron turning.
-
Versatile & robust: Works well under both continuous and interrupted cutting, including unstable conditions common in automotive and general engineering.
🏭 Application Industries
-
Automotive (engine blocks, cylinder heads, clutch housings)
-
Aerospace (cast iron structural components, jigs, fixtures)
-
Die & Mold (cast iron die-blocks, mould bases, medium alloy steel inserts)
-
General Engineering (machining of grey and nodular cast iron, low-alloy steels in fabrication)
📞 Call-to-Action
/ 
Related Products
20%
OFF
20%
OFF
You May Also Like
Frequently Asked Questions
It is especially designed for cast iron (grey and nodular) and low-to-medium alloy steels, in medium to finishing turning operations. Thanks to the DC820 coating technology it handles the wear and shock loads typical of cast iron machining.
Yes. Duracarb’s literature states the DC820 grade is suitable for unstable conditions and interrupted cuts, making it reliable in demanding production environments
The CNMA120408 geometry features a ~12 mm inscribed circle, 4.76 mm thickness and 0.8 mm corner radius (for the “120408” variant). It’s a negative 80° insert style (CNMA).
DC820 uses an improved alumina (Al₂O₃) CVD coating with enhanced wear and impact resistance. A smoother top surface reduces friction and edge build-up, enabling higher speeds and longer life.
At CNC Tools Depot – India’s largest marketplace for carbide inserts – you can message us via WhatsApp or call directly for stock check, pricing and bulk-order advantages. We also support fast dispatch and technical support when required.
India's Largest Marketplace for Carbide Inserts & Cutting Tools.
© 2025. All Rights Reserved
Disclaimer: All Brand Logos belong to their respective owners, CNC Tools Depot is sharing publicly available information