Iscar 5550476 TNMG543GN IC8250 Carbide Turning Insert

Product Description

The ISCAR 5550476 is a TNMG-style solid carbide turning insert designed for precision external and internal turning operations on steel and stainless steel workpieces. Identified by ISO code TNMG 543-GN, this insert carries the IC8250 manufacturer grade and features a CVD-applied tri-layer coating of TiCN, Al2O3, and TiN. The coating sequence delivers thermal resistance and wear protection suited to continuous and interrupted cuts. The GN chip breaker geometry supports controlled chip formation across a range of feeds and depths. With an inscribed circle of 0.625 inches and an insert length of 1.083 inches, this is a mid-size triangular insert suitable for production turning on CNC lathes and manual turning centers.

This insert is classified under the Isoturn series and carries ISO 13399 compliance. It is intended for single-end use and is compatible with clamp and pin-style toolholders that accept TNMG-geometry inserts. Primary workpiece material codes are P (steel) and M (stainless steel), making it a practical choice for job shops and production facilities running mild steel, alloy steel, and austenitic stainless grades. Maximum depth of cut is 6.00 mm (0.236 inches). It is installed by machinists and CNC operators in metalworking environments. Minimum order quantity is 10 inserts; package quantity is 1.

Key Features

• IC8250 grade with CVD TiCN/Al2O3/TiN coating for wear resistance on steel and stainless steel
• GN chip breaker geometry for controlled chip evacuation across varied feed rates
• 60-degree triangular insert shape (TNMG style) with 0-degree relief angle and N clearance code
• Corner radius of 0.047 inches (3/64 inches) for general-purpose finishing and semi-finishing
• Maximum depth of cut of 6.00 mm (0.236 inches)
• ISO 13399 compliant; compatible with clamp and pin toolholder systems

Compatibility

Designed for use in TNMG-style toolholders accepting clamp and pin holding methods. Compatible with ISO 13399-compliant turning tool systems. Suited for workpieces classified under ISO material codes P (steel) and M (stainless steel).

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and de-energize the machine before indexing or replacing inserts. Use the appropriate torque wrench per the toolholder manufacturer's specification when securing the clamping screw. Inspect the insert seat and chip pocket for debris before seating a new insert to ensure proper contact and prevent premature edge failure.