Iscar 5566681 CNMG432-M3P IC8250 Turning Insert

Product Description

The ISCAR 5566681 is a CNMG432-M3P double-ended turning insert in the Isoturn series, manufactured from solid carbide and CVD-coated with a TiCN, Al2O3, and TiN multilayer coating. Grade IC8250 is engineered for consistent performance in turning operations on stainless steel and steel workpieces. The 80-degree diamond insert shape (Code C) provides a strong cutting geometry with a positive rake angle. The insert measures 12.9 mm (0.508 inches) in length with a 0.5-inch inscribed circle and a 1/32-inch corner radius, making it suitable for medium-duty turning and facing applications. Licensed machinists and CNC operators install and index this insert.

This insert is designed for turning and facing operations in both job shop and production environments. The M3P chip breaker geometry is optimized for stainless steel and steel, helping manage chip flow and reduce built-up edge in continuous and semi-interrupted cuts. The maximum depth of cut is 5.51 mm (0.217 inches). The Clamp and Pin holding method ensures rigid seating in compatible toolholders. As a multi-use insert, it supports facing as a primary application alongside general turning work on CNMG-compatible toolholding systems.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal stability
• Grade IC8250 solid carbide substrate suited for stainless steel and steel
• M3P chip breaker geometry optimized for controlled chip formation
• Double-ended insert maximizes usable cutting edges per unit
• Positive rake angle reduces cutting forces in turning and facing operations
• Compliant with ISO 13399 insert identification standards

Compatibility

Designed as an OEM-style replacement for CNMG 432 insert seats. Compatible with CNMG-style toolholders using Clamp and Pin holding methods. Primary workpiece materials are stainless steel (ISO Code M) and steel (ISO Code P). Refer to ISCAR toolholder documentation for confirmed seat compatibility.

Installation Notes

Insert indexing and replacement should be performed by a qualified machinist or CNC operator with the machine fully stopped and power isolated. Use the appropriate torque wrench and clamping hardware specified by the toolholder manufacturer to seat the insert correctly. Do not exceed the maximum depth of cut rating of 5.51 mm (0.217 inches) for the application. Inspect the insert seat for debris or damage before each index to maintain dimensional accuracy and tool life.