Sandvik Coromant 6770741 Indexable Drill Insert 880LM

Product Description

The SANDVIK COROMANT 6770741 is a solid carbide indexable drill insert designed for use with 880-series indexable drills in precision hole-making operations. Carrying the 880LM chipbreaker geometry and manufactured to grade 4344, this insert features a TiAlN2 PVD coating that delivers elevated heat resistance and extended tool life in demanding drilling applications. The square insert shape has an inscribed circle of 8.90 mm (0.3504 inches), a corner radius of 0.80 mm (0.0315 inches), and a thickness of 0.1181 inches. Right-hand cutting direction is standard. Installation and setup is performed by machinists and CNC tooling technicians in metalworking and manufacturing environments.

This insert is suited for use in ferrous and non-ferrous machining applications where controlled chip formation and hole-entry accuracy are required. The LM chipbreaker geometry supports low-to-medium feed drilling, making this insert appropriate for through-hole and blind-hole operations in materials where chip evacuation is a priority. Typical environments include production machining shops, job shops, and manufacturing cells running CNC turning centers or machining centers equipped with 880-series drill bodies.

Key Features

• Solid carbide substrate with TiAlN2 PVD coating for heat resistance and extended edge life
• 880LM chipbreaker geometry engineered for controlled chip formation at low-to-medium feeds
• Grade 4344 — optimized for balance of toughness and wear resistance
• Square insert shape with 8.90 mm inscribed circle and 0.80 mm corner radius
• Right-hand cutting direction; insert size 050308
• Hole diameter of 3.20 mm (0.1260 inches) for secure seating in compatible drill bodies

Compatibility

Designed as an OEM-style replacement insert for SANDVIK COROMANT 880-series indexable drill bodies accepting square solid carbide inserts with an 050308 insert size designation and a 3.20 mm mounting hole diameter.

Installation Notes

Insert seating and clamping should be performed by a qualified machinist or tooling technician. The drill body and machine spindle must be fully de-energized and locked out before any insert change. Seat pocket and clamping screw threads should be inspected and cleaned prior to installation. Torque the clamping screw to the specification listed in the applicable SANDVIK COROMANT tool assembly documentation for the specific drill body in use.