Sandvik Coromant 5908877 Turning Insert CNGG431-SGF 1125

Product Description

The SANDVIK COROMANT 5908877 is a solid carbide turning insert in the CNGG431-SGF geometry, part of the T-Max P series. It features a dual-layer TiAlN and AlCr2O3 PVD coating engineered for wear resistance and thermal stability during interrupted and continuous cuts. The insert has an 80-degree diamond shape with a neutral hand orientation, a 1/2-inch inscribed circle, and a 1/64-inch corner radius (0.0156 inches). Insert length is 0.3346 inches and thickness is 3/16 inches (0.1875 inches). The SGF chip breaker geometry is optimized for finishing operations. Licensed HVAC technicians and machinists in precision turning applications install and index these inserts.

This insert is designed primarily for turning stainless steel (ISO material code M) and performs well in superalloy and titanium applications (ISO material code S). Typical use cases include finish turning operations on stainless components in aerospace, medical, and industrial manufacturing environments. The CNGG insert style with the SGF chip breaker is well suited to low-feed, tight-tolerance work where surface finish and edge stability are critical. The ISO designation for this insert is CNGG120404-SGF 1125.

Key Features

• TiAlN and AlCr2O3 PVD dual-layer coating for heat resistance and extended tool life on stainless and superalloys
• 80-degree diamond insert shape (CNGG style) with neutral hand for flexible toolholder mounting
• SGF chip breaker geometry optimized for finishing cuts on difficult-to-machine materials
• 1/4-inch corner radius (1/64 inch, 0.40 mm) for fine surface finishes
• 4 usable cutting edges per insert for cost efficiency
• Clamp and pin insert holding method compatible with standard T-Max P toolholders

Compatibility

Designed for use in T-Max P series toolholders accepting CNGG-style inserts with a 1/2-inch inscribed circle. Compatible with clamp and pin holding systems. ISO designation CNGG120404-SGF 1125 can be used to cross-reference to compatible toolholder systems.

Installation Notes

Indexable turning inserts are installed and indexed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque tool specified by the toolholder manufacturer when securing the clamping screw — do not use impact tools. Inspect the toolholder seat and clamp for damage before seating a new insert to ensure proper contact and edge presentation.