Sandvik Coromant 6770747 Indexable Drill Insert 880GR

Product Description

The SANDVIK COROMANT 6770747 is a solid carbide indexable drill insert designed for use with 880-series indexable drills. Manufactured to grade 4344 with a PVD-applied TiAlN2 coating, this insert is built for demanding drilling operations in a range of workpiece materials. The square insert geometry features an inscribed circle of 0.498 inches (12.65 mm), a thickness of 0.1575 inches, and a 1.2 mm corner radius. The GR chipbreaker style promotes controlled chip formation during deep-hole drilling. Installed by machinists and tooling professionals in CNC and manual drilling operations, this insert seats into compatible 880-series drill bodies as an outer or inner cutting position replacement.

This insert is suited for indexable drilling applications in production and job-shop environments where consistent hole quality and tool life are priorities. The TiAlN2 PVD coating provides thermal resistance and wear protection, making it appropriate for dry or minimum-quantity lubrication machining strategies. Insert size designation is 070412, corresponding to the 880 series geometry standard. Typical applications include through-hole and blind-hole drilling in steel, cast iron, and similar ferrous materials.

Key Features

• Solid carbide construction, manufacturer grade 4344
• PVD TiAlN2 coating for wear and heat resistance
• GR chipbreaker for controlled chip evacuation
• Square insert shape with 1.2 mm corner radius
• Inscribed circle of 0.498 inches (12.65 mm)
• Insert size 070412, compatible with 880-series drill bodies

Compatibility

Designed as a replacement insert for SANDVIK COROMANT 880-series indexable drill bodies accepting square insert style 880 geometry in insert size 070412.

Installation Notes

Indexable drill inserts should be installed by qualified machinists or tooling technicians with the machine powered down and locked out. Seat the insert firmly against all pocket walls and use the correct torque driver for the clamping screw to prevent insert movement during cutting. Inspect the insert pocket for chips or damage before seating a new insert. Follow the drill body manufacturer's recommended cutting parameters for the grade and coating being used.