Sandvik Coromant 6770746 Indexable Drill Insert 880GM

Product Description

The SANDVIK COROMANT 6770746 is a solid carbide indexable drill insert engineered for use with compatible indexable drill bodies in demanding metal-cutting applications. Carrying the 4344 manufacturer grade and featuring a TiAlN2 coating applied via PVD process, this insert delivers thermal and wear resistance suited to high-speed drilling operations. The GM chipbreaker geometry promotes controlled chip evacuation, reducing the risk of chip packing in deep-hole drilling. With a 12.65 mm (0.4980 inch) inscribed circle and a 0.60 mm (0.0236 inch) corner radius, the insert is sized for precision fitment in the 880-series tooling platform. Licensed HVAC techs, plumbers, and electricians are not the target here — this insert is specified and installed by machinists and tooling engineers in production and job-shop environments.

This insert is designed for right-hand cutting and is appropriate for use in CNC machining centers, turning centers configured for live tooling, and dedicated drilling cells. The square insert shape and 880-series style designation make it compatible with indexable drill bodies engineered around that insert platform. It suits applications in general metalworking, aerospace component machining, and production drilling where consistent hole quality and insert longevity are required. The GM chipbreaker makes it particularly effective in medium to ductile workpiece materials where chip control is a primary concern.

Key Features

• Solid carbide substrate provides rigidity and edge stability at elevated cutting speeds
• TiAlN2 PVD coating enhances heat resistance and extends tool life in ferrous and high-temp alloy drilling
• GM chipbreaker geometry promotes positive chip formation and evacuation in ductile materials
• Right-hand cutting orientation for standard CNC drilling applications
• 0.60 mm corner radius reduces insert edge chipping during entry and exit
• Insert size 070406 with 4.00 mm hole diameter for secure clamping in the tool body

Compatibility

Designed as an OEM-style replacement insert for indexable drill bodies accepting the 880-series square insert style with a 12.65 mm inscribed circle.

Installation Notes

Insert indexing and replacement should be performed by a qualified machinist or tooling technician. Ensure the drill body and insert pocket are clean and free of chips or debris before seating the insert. Power down and lock out the machine spindle before any insert change. Consult the tooling manufacturer's torque specification for the clamping screw, as over- or under-torquing the screw can lead to insert movement or pocket damage.