Iscar 5550508 Vnmm Turning Insert IC8250 Ticn Al2o3

Product Description

The ISCAR 5550508 is a solid carbide VNMM-style turning insert in the Isoturn series, designed for external and internal turning operations on stainless steel and steel workpieces. It carries a 35-degree diamond (V) insert shape with a positive rake geometry, making it well suited for profiling and finishing cuts where tight tolerances and surface finish matter. The IC8250 grade substrate is finished with a CVD-applied TiCN and Al2O3 dual-layer coating that resists heat buildup and wear in continuous and interrupted cuts. The PP chip breaker geometry promotes efficient chip evacuation at moderate feeds and depths. Licensed machinists and CNC turning specialists install this insert on compatible tool holders in production and job-shop environments.

This insert is intended for turning operations on stainless steel and carbon steel. It handles a maximum depth of cut of 2.50 mm (0.0984 inches) and is held in position by clamp and pin methods, making it compatible with tool holders that accept the VNMM insert style and N clearance code. The Isoturn series is a standard ISCAR platform used across a wide range of turning centers and manual lathes in both precision and general-purpose machining environments.

Key Features

• IC8250 grade solid carbide substrate with CVD TiCN and Al2O3 dual-layer coating for extended tool life on steel and stainless steel
• 35-degree diamond (V) insert shape with positive rake for reduced cutting forces and improved surface finish
• PP chip breaker geometry promotes controlled chip flow at moderate feed rates
• Maximum depth of cut of 2.50 mm supports finish and semi-finish turning passes
• Clamp and pin holding method provides rigid, repeatable insert seating
• Conforms to ISO 13399 standards for consistent tooling data interchange

Compatibility

Designed as a direct-fit replacement for tool holders accepting VNMM-style inserts with N clearance code, M tolerance code, and clamp or pin clamping. Primary workpiece material compatibility is stainless steel (ISO material code M) and steel (ISO material code P) per ISO 13399 classification.

Installation Notes

Insert installation and replacement should be performed by a qualified machinist with the machine in a full stop and all axes locked. Use the appropriate torque wrench for the clamping screw to avoid seat damage — refer to the tool holder manufacturer specification for torque values. Inspect the insert pocket and seating surface for chips or debris before seating the new insert. Never run an insert that shows chipping, edge breakdown, or coating delamination at the cutting edge.