Sandvik Coromant 6770744 Indexable Drill Insert 880GT 4344

Product Description

The SANDVIK COROMANT 6770744 is a solid carbide indexable drill insert designed for use in 880-series indexable drills. Manufactured to insert style 880 with a GT chipbreaker geometry, this insert carries a PVD-applied (Ti,Al)N2 coating that improves wear resistance and thermal stability during high-speed drilling operations. The square insert shape provides a 10.65 mm inscribed circle, a 1.00 mm corner radius, and a thickness of 0.1378 inches (0.14 inches nominal). It is seated and retained via a 4.00 mm hole diameter. Machinists, tooling technicians, and CNC operators working in production drilling environments install this insert as part of a modular drill body assembly.

This insert is suited for production drilling in ferrous and non-ferrous materials where consistent tool life and repeatable hole geometry are required. The 880GT 4344 grade designation indicates a carbide substrate optimized for a broad range of workpiece materials, including steel and cast iron, in both roughing and finishing drilling passes. It is used in both horizontal and vertical machining center applications and in turning center live-tool configurations. The GT chipbreaker geometry helps control chip evacuation in deep-hole and through-hole drilling cycles.

Key Features

• Insert style 880 with GT chipbreaker geometry for controlled chip formation
• Solid carbide substrate with manufacturer grade 4344 for broad material compatibility
• PVD (Ti,Al)N2 coating for improved wear resistance and cutting-edge integrity
• Square shape with 10.65 mm inscribed circle and 1.00 mm corner radius
• Insert size 604, length 19.00 mm (0.7480 inches), thickness 0.1378 inches
• 4.00 mm mounting hole diameter for secure indexable seating in the drill body

Compatibility

Designed as an OEM-specification replacement insert for SANDVIK COROMANT 880-series indexable drill bodies accepting insert size 604 with a square seat geometry. Verify drill body insert pocket specifications before installation.

Installation Notes

Installation is performed by tooling technicians or machinists during planned insert indexing or replacement cycles. The drill body must be removed from the spindle and all machine motion must be stopped and locked out before handling indexable inserts. Use the appropriate Torx or hex key specified by the drill body manufacturer to torque the clamping screw; do not use impact tools on insert clamping hardware. Inspect the insert pocket and seating surfaces for debris or damage before seating the new insert.