Kennametal 1157967 Indexable Drill Insert KC720 Carbide

Product Description

The KENNAMETAL 1157967 is a solid carbide indexable drill insert designed for use in indexable drilling operations on machining centers, CNC lathes, and drill presses. This insert carries the KC720 manufacturer grade with a PVD-applied TiN coating, providing wear resistance and extended tool life in a range of ferrous workpiece materials. The insert style is DFT with an LD chipbreaker geometry, an 84-degree included angle in a Trigon shape, a 15 mm inscribed circle (0.5910 inches), and a corner radius of 0.80 mm (0.0315 inches). Licensed machinists and tooling technicians are the typical installers. Each package contains one insert, sold in multiples of five.

This insert is suited for both roughing and finishing drill operations in production machining environments. The LD chipbreaker aids chip evacuation in materials classified under material grades C1 through C5, which span cast irons and general-purpose steels. It is appropriate for horizontal and vertical machining centers where indexable drill bodies accept DFT-style inserts with the DFTLD insert style designation and size 090508.

Key Features

• KC720 grade with PVD TiN coating for extended wear resistance in ferrous materials
• LD chipbreaker geometry promotes efficient chip evacuation during deep-hole drilling
• 84-degree Trigon insert shape with 0.80 mm corner radius for controlled cutting action
• 15 mm inscribed circle (0.5910 inches) fits DFT-compatible indexable drill bodies at insert size 090508
• 8-degree relief angle reduces rubbing and heat buildup at the cutting edge
• Solid carbide substrate provides rigidity and dimensional stability under high feed rates

Compatibility

Designed as an OEM-style replacement insert for indexable drill bodies that accept DFT insert style with an LD chipbreaker, size 090508, and a 5.5 mm mounting hole diameter.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the machine fully powered down and spindle locked before changing inserts. Use a calibrated torque screwdriver appropriate for carbide insert screws to avoid over-torquing the mounting hole. Inspect the insert pocket and clamping screw for wear or debris before seating the new insert. Follow the tooling manufacturer's recommended cutting parameters for the KC720 grade and the specific workpiece material.