Sandvik Coromant 6851269 Turning Insert CNGG43.50-SGF 1115

Product Description

The SANDVIK COROMANT 6851269 is a solid carbide turning insert in the CNGG style, designed for precision external turning operations. Carrying the 1115 manufacturer grade and a PVD-applied TiAlN and AlCr2O3 dual-layer coating, it is engineered primarily for machining stainless steel, with secondary suitability for superalloys and titanium. The insert features an 80-degree diamond shape, a sharp SGF chip breaker geometry, and a 0.20 mm corner radius for controlled, clean cuts at tight tolerances. It belongs to Sandvik Coromant's T-Max P series and is installed by CNC machinists and toolroom technicians on lathes and turning centers requiring consistent insert geometry and coating performance.

This insert is suited for finishing and semi-finishing passes on stainless steel and difficult-to-machine materials including superalloys and titanium. The SGF chip breaker is optimized for light to medium depths of cut, making it a practical choice in precision turning applications where surface finish and edge integrity are critical. With four available cutting edges per insert and neutral hand orientation, it fits standard CNGG-style toolholders used in both production and job-shop turning environments. The 0.5000 inch inscribed circle size and 3/16 inch thickness are common dimensions in medium-range turning toolholder systems.

Key Features

• PVD-coated TiAlN and AlCr2O3 dual-layer coating for heat resistance and wear performance on stainless steel and superalloys
• 80-degree diamond insert shape (CNGG style) with sharp SGF chip breaker for controlled chip formation
• 0.20 mm corner radius for tight-tolerance finishing and semi-finishing passes
• Four cutting edges per insert, neutral hand, maximizing tool economy
• Clamp and pin insert holding method for secure seating in compatible toolholders
• T-Max P series with ISO code CNGG 12 04 02-SGF 1115 for straightforward cross-referencing

Compatibility

Designed for use in CNGG-style turning toolholders compatible with a 0.5000 inch inscribed circle and 3/16 inch insert thickness. Accepts clamp and pin holding methods. ISO designation CNGG 12 04 02-SGF 1115 can be used to confirm fitment with toolholder manufacturer specifications.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before seating or removing inserts. Ensure the insert pocket and seating surfaces are clean and free of chips or debris before clamping to maintain proper insert positioning and edge engagement. Follow the toolholder manufacturer's recommended clamping torque and holding method for CNGG-style inserts.