Sandvik Coromant 6770749 Indexable Drill Insert 880LM

Product Description

The SANDVIK COROMANT 6770749 is a solid carbide indexable drill insert engineered for use with compatible 880-series indexable drills. Carrying the 4344 manufacturer grade with a TiAlN2 PVD coating, this insert is built to handle demanding hole-making operations in steel, cast iron, and similar workpiece materials. The square insert shape with an LM chipbreaker geometry promotes efficient chip formation and evacuation in through-hole and blind-hole drilling applications. Key dimensional specs include a 12.65 mm (0.4980 inch) inscribed circle, a 1.00 mm (0.0394 inch) corner radius, and a thickness of 0.1575 inches. Right-hand cutting direction is standard.

This insert is intended for use in metalworking and machining environments where precision hole quality and tool longevity are priorities. It seats in 880-series indexable drill bodies as a peripheral or center insert replacement, depending on body configuration and insert position. Typical users include CNC machinists, toolroom technicians, and production floor operators running turning centers, machining centers, or dedicated drilling equipment. The LM chipbreaker is suited to a range of feed and speed conditions common in general-purpose drilling of ferrous materials.

Key Features

• Solid carbide substrate with TiAlN2 PVD coating for wear resistance and thermal stability
• 880LM chipbreaker geometry promotes controlled chip formation during drilling
• Square insert shape with 1.00 mm corner radius — insert size 070410
• 12.65 mm inscribed circle (0.4980 inches) for accurate seating in 880-series drill bodies
• Right-hand cutting direction; 4.00 mm mounting hole diameter
• Sold individually; minimum order quantity is 10 units

Compatibility

Designed as an OEM-style replacement insert for 880-series indexable drill bodies that accept square inserts with a 12.65 mm inscribed circle and 4.00 mm mounting hole. Verify center versus peripheral insert position requirements with the drill body specification before ordering.

Installation Notes

Insert seating and torque should follow the drill body manufacturer's tooling assembly guidelines. Always de-energize and lock out the machine spindle before changing inserts. Use the correct Torx or hex key specified for the clamping screw — do not substitute drivers that may damage the screw head or insert pocket. Inspect the insert pocket and locating surfaces for chips or debris before seating a new insert to ensure proper contact and runout.