Iscar 5550314 DNMG331NF IC807 Turning Insert Diamond 55

Product Description

The ISCAR 5550314 is a solid carbide turning insert in the DNMG331NF geometry, grade IC807, designed for precision external and internal turning operations on CNC lathes and manual turning centers. The insert features a Physical Vapor Deposition (PVD) TiAlN coating applied over a submicron carbide substrate, delivering wear resistance and heat stability at elevated cutting speeds. Key geometry details include a 55-degree diamond shape, a 3/8-inch inscribed circle, a 1/64-inch corner radius, and a positive rake configuration with an NF chip breaker. This insert is installed and changed out by machinists and CNC setup technicians in production and job shop environments.

The DNMG331NF IC807 insert is suited for turning applications on stainless steel (ISO M), carbon and alloy steels (ISO P), and superalloys and high-temperature alloys (ISO S). It performs in both continuous and light interrupted cuts where a positive-rake insert with a fine chip breaker and TiAlN coating provides an advantage. The NF chip breaker geometry supports controlled chip formation at light to medium depths of cut, making this insert a practical choice for finishing and semi-finishing passes on precision turned components.

Key Features

• PVD TiAlN coating over submicron solid carbide substrate for extended tool life in steel and stainless applications
• 55-degree diamond (DNMG) insert shape with positive rake for reduced cutting forces
• NF chip breaker geometry optimized for light to medium depth finishing and semi-finishing cuts
• Maximum depth of cut of 0.118 inches (3.00 mm)
• Clamp and pin holding method for secure, repeatable seating in compatible toolholders
• Conforms to ISO 13399 tooling data standards for integration with CAM and tool management systems

Compatibility

Designed for use in DNMG-style turning toolholders that accept a 3/8-inch inscribed circle insert with a 0.150-inch hole diameter and clamp-plus-pin holding. Part of the ISCAR Isoturn series.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. The machine spindle must be stopped and the turret or tool post fully de-energized before indexing or replacing inserts. Use the appropriate clamp screw torque driver recommended for DNMG-style toolholders to avoid cracking the carbide or stripping the clamp. Inspect the toolholder pocket for chips or debris before seating the insert to ensure proper contact and repeatability.