Iscar 5506977 CNMG432NR Turning Insert 80 Deg Diamond

Product Description

The ISCAR 5506977 is a CNMG432NR IC9350 grade indexable turning insert designed for external and internal turning operations on CNC lathes and turning centers. The insert is manufactured from solid carbide and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides a combination of wear resistance and toughness suited to interrupted and continuous cuts. The 80-degree diamond (rhombic) shape delivers a strong cutting edge geometry. The insert measures 12.9 mm (0.508 inches) in length with a 0.5-inch inscribed circle and a 0.0313-inch corner radius. The NR chip breaker geometry is rated for roughing and medium machining applications.

This insert is part of ISCAR's Isoturn series and is suited for machining steel (ISO P) and stainless steel (ISO M) workpiece materials. The IC9350 grade targets conditions requiring moderate to high wear resistance combined with toughness, making it appropriate for production turning where tool life consistency is critical. Typical applications include shaft turning, face turning, and profile turning on manual or CNC equipment in job shop and production environments. Licensed machinists and CNC operators are the primary installers of this insert.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for extended tool life in steel and stainless steel
• 80-degree diamond insert shape (CNMG) with negative side clearance for rigid, high-force cuts
• NR chip breaker geometry rated for roughing and medium machining operations
• Maximum depth of cut: 4.5 mm (0.177 inches)
• IC9350 grade provides moderate wear resistance to high toughness across P and M material groups
• Compliant with ISO 13399 cutting tool data representation standard

Compatibility

Designed as an OEM-style replacement and standard stocking insert for CNMG432 toolholders using clamp or pin insert-holding methods with a clearance code N (negative rake) and tolerance code M seating.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Ensure the machine spindle is stopped and the turret is fully indexed and locked before changing inserts. Use the appropriate torque wrench per toolholder manufacturer guidelines when securing the clamp or pin; do not overtighten by feel alone. Inspect the insert seat and chip pocket for debris before seating the new insert to ensure proper contact and edge stability.