Kennametal 1157963 Indexable Drill Insert Dftld KC720

Product Description

The KENNAMETAL 1157963 is a solid carbide indexable drill insert designed for precision drilling applications in metal cutting operations. Manufactured to the DFTLD style with a Trigon (84-degree included angle) geometry, this insert features a PVD-applied TiN coating over the KC720 carbide grade substrate. The 6 mm inscribed circle, 0.4 mm corner radius, and LD chipbreaker geometry work together to manage chip flow and reduce cutting forces in demanding drilling cycles. Licensed machinists and CNC operators working in production environments install these inserts in compatible indexable drill bodies where repeatable hole quality and insert-to-insert consistency are critical.

This insert is suited for indexable drilling applications in ferrous and non-ferrous materials where the KC720 grade and TiN PVD coating deliver extended tool life. The LD chipbreaker is optimized for drilling operations requiring controlled chip formation in light-to-medium feed conditions. Material grades C1 through C5 cover a broad range of workpiece materials including carbon steels, alloy steels, and cast irons. The 030304 insert size designator and 84-degree Trigon shape are standard references when cross-referencing toolholder seat requirements for indexable drill systems.

Key Features

• Solid carbide substrate with KC720 manufacturer grade for wear resistance in steel and cast iron drilling
• PVD TiN coating reduces built-up edge and extends cutting life compared to uncoated inserts
• LD chipbreaker geometry promotes controlled chip formation at moderate feed rates
• 84-degree Trigon shape with 8-degree relief angle provides positive cutting action and clearance
• 0.4 mm corner radius balances edge strength and surface finish requirements
• 6 mm inscribed circle with 2.65 mm mounting hole diameter for precise seat engagement

Compatibility

Designed for use in indexable drill bodies and toolholders specifying the DFT insert style with a 030304 insert size, 84-degree Trigon geometry, and a 2.65 mm hole diameter seat. Verify toolholder documentation for exact insert style and size requirements before installation.

Installation Notes

Indexable drill inserts are installed and replaced by machinists or CNC tooling technicians following machine-specific lockout and tool-change procedures. Ensure the spindle is fully stopped and the machine is in a safe state before accessing the toolholder. Use the manufacturer-recommended torx or hex key for the insert clamping screw and do not overtighten, as carbide inserts are brittle and can crack under excess clamping force. Inspect the toolholder seat for debris, chips, or wear before seating a new insert.