Iscar 5507693 CNMG543NR IC8250 Turning Insert Isoturn

Product Description

The ISCAR 5507693 is a solid carbide turning insert in the CNMG543NR geometry, manufactured under the IC8250 grade with a multilayer PVD coating of TiCN, Al2O3, and TiN. It belongs to the Isoturn series and is designed for use in CNC and manual turning operations on metal workpieces. The insert features an 80-degree diamond shape with a neutral rake (0-degree relief angle, clearance code N) and a 3/64-inch corner radius. At 15.90 mm (0.626 inches) in length with a 5/8-inch inscribed circle, it fits standard CNMG-style toolholders. The NR chip breaker geometry supports controlled chip formation across a range of depths of cut up to 7.00 mm (0.2756 inches).

This insert is intended for turning applications on steel and stainless steel workpieces, corresponding to ISO material group codes P and M. It is suited for medium to finishing passes on external and internal turning operations in production machining environments. The IC8250 PVD-coated grade provides wear resistance and edge toughness appropriate for interrupted cuts and varying feed conditions. Machinists and CNC operators in job shops, aerospace, and general manufacturing will find this insert compatible with standard Isoturn series tooling setups.

Key Features

• IC8250 grade with multilayer PVD coating: TiCN, Al2O3, and TiN for wear resistance and thermal stability
• 80-degree diamond insert shape (CNMG) with 0-degree relief angle for rigid, stable cutting edge support
• 3/64-inch (0.0469-inch) corner radius for a balance of edge strength and surface finish capability
• NR chip breaker geometry supports chip control across a range of cutting conditions
• Maximum depth of cut up to 7.00 mm (0.2756 inches)
• ISO 13399 compliant tooling data standard for seamless CAM and tool management integration
• Insert holding method supports both clamp and pin retention for secure seating in compatible toolholders

Compatibility

Designed as an OEM-style replacement and standard production insert for CNMG-style toolholders within the Isoturn series. Compatible with toolholders accepting a 5/8-inch inscribed circle, 1/4-inch thick CNMG inserts with pin or clamp retention. Primary workpiece material compatibility includes ISO P (steel) and ISO M (stainless steel) material groups.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the machine powered down and in a locked-out state before index or insert change. Ensure the toolholder pocket and clamping surfaces are clean and free of chips or debris before seating the insert. Torque clamping screws according to the toolholder manufacturer specifications, not this insert specification. Verify insert orientation and chip breaker direction match the intended cutting geometry before resuming operation.