Sandvik Coromant 8020990 Turning Insert Diamond Carbide

Product Description

The SANDVIK COROMANT 8020990 is a CPMT-series turning insert designed for precision metal cutting on CNC lathes and turning centers. It features an 80-degree diamond insert shape (Shape Code C) with a neutral hand orientation, making it suitable for general-purpose external turning operations. The insert is manufactured from solid carbide and carries a multi-layer CVD coating — TiCN, Al2O3, and TiN — under manufacturer grade 4415. This coating stack provides wear resistance and thermal stability during continuous cuts in steel and similar materials. The 0.0313-inch corner radius and CPMT 09 T3 08-PF geometry follow ISO standard CPMT 09 T3 08-PF 4415. Machinists and CNC programmers specify this insert for consistent chip control and extended tool life in production environments.

This insert is engineered primarily for steel workpieces, consistent with its grade 4415 designation and CVD coating process. The secondary workpiece material code K indicates suitability for cast iron applications as well. The CPMT-PF series chip breaker (PF/PR) geometry is optimized for light to medium depth-of-cut passes, making this insert a practical choice for finish and semi-finish turning on ferrous components. It seats in standard CPMT-style toolholders using clamp or screw holding methods and is appropriate for high-volume production machining in manufacturing and job shop environments.

Key Features

• 80-degree diamond insert shape (ISO Shape Code C) for versatile external turning
• Multi-layer CVD coating: TiCN, Al2O3, and TiN for thermal resistance and wear life
• Manufacturer grade 4415 optimized for steel (primary) and cast iron (secondary) workpieces
• 0.0313-inch corner radius for controlled surface finish on finish and semi-finish passes
• Neutral hand orientation compatible with right-hand and left-hand toolholder setups
• CPMT-PF chip breaker geometry supports light to medium depth-of-cut applications
• Clamp and screw holding method compatibility for secure seating in standard CPMT toolholders

Compatibility

Designed as an OEM-style replacement insert for standard CPMT-style turning toolholders that accept the CPMT 09 T3 08-PF insert geometry with clamp or screw holding. No specific machine or toolholder model compatibility was provided in the product data.

Installation Notes

This insert is installed and serviced by machinists and CNC tooling technicians. Always power down and lock out the machine spindle before changing inserts. Use appropriate insert seating tools and inspect the pocket, clamp, and screw for wear or damage before installing a new insert. Follow the toolholder manufacturer torque specifications for the clamping screw — do not overtighten, as this can fracture the carbide insert.