Sandvik Coromant 6770729 Indexable Drill Insert 880LM 4344

Product Description

The SANDVIK COROMANT 6770729 is a solid carbide indexable drill insert designed for use in 880-series indexable drills. Manufactured to grade 4344 with a TiAlN2 PVD coating, this insert delivers wear resistance and thermal stability in demanding drilling operations. It features an 880LM chipbreaker geometry and a square shape with a 5.1 mm (0.2008 inch) inscribed circle, 0.0945-inch thickness, and a 0.5 mm (0.0197-inch) corner radius. Installation and replacement are performed by machining professionals and toolroom technicians working with indexable drilling systems in ferrous and non-ferrous material applications.

This insert is suited for use in 880-style indexable drill bodies in CNC turning centers, machining centers, and mill-turn platforms. The LM chipbreaker is intended for light to medium cutting conditions where controlled chip formation is required. The square insert geometry and 2.2 mm hole diameter support secure clamping in compatible drill bodies. It is sold individually with a minimum order quantity of 10 units, making it appropriate for shop stock replenishment or toolcrib management.

Key Features

• Grade 4344 solid carbide substrate with TiAlN2 PVD coating for heat and wear resistance
• 880LM chipbreaker geometry for controlled chip evacuation in light to medium drilling
• Square insert shape with 5.1 mm inscribed circle (0.2008 inches)
• 0.5 mm corner radius for edge stability during entry and exit
• 0.0945-inch insert thickness for rigid seating in 880-series drill bodies
• 2.2 mm mounting hole diameter for positive clamping retention

Compatibility

Designed as an OEM-style replacement insert for 880-series indexable drill bodies that accept square carbide inserts with a 5.1 mm inscribed circle and 2.2 mm mounting hole.

Installation Notes

Insert replacement should be performed by a qualified machinist or toolroom technician with the machine fully powered down and spindle locked. Use the correct Torx or insert-clamp key specified for the drill body to seat the insert without over-torquing the clamping screw. Inspect the insert pocket and clamping seat for chips or debris before seating the new insert. Follow the drill body manufacturer's recommended cutting parameters when returning the tool to service.