Kennametal 5066221 Indexable Drill Insert Trigon KCU40

Product Description

The KENNAMETAL 5066221 is a solid carbide indexable drill insert designed for use in indexable insert drills in metal-cutting applications. Built to the DFT insert style with a Trigon (84-degree included angle) geometry, this insert features a 15 mm (0.5906 inches) inscribed circle and a 0.2067-inch thickness. It carries a KCU40 grade designation and a PVD-applied TiN/TiAlN dual-layer coating that supports higher cutting speeds and improved wear resistance. The HP chipbreaker geometry promotes controlled chip formation in demanding drilling operations. Installation and replacement are performed by machinists and toolroom professionals on CNC and manual drilling equipment.

This insert is suited for indexable drill toolholders requiring a DFT-style Trigon insert with a 15 mm inscribed circle and a neutral hand orientation. Typical applications include through-hole and blind-hole drilling in ferrous and non-ferrous metals where consistent bore quality and tool life are priorities. The 0.0313-inch (0.79 mm) corner radius and 9-degree relief angle make it appropriate for medium to finish-range drilling passes. It is sold individually with a minimum order quantity of 5 units.

Key Features

• DFT insert style with Trigon shape and 84-degree included angle for positive cutting geometry
• KCU40 solid carbide grade with PVD-applied TiN/TiAlN coating for wear resistance and thermal protection
• HP chipbreaker for controlled chip evacuation in deep-hole and interrupted-cut drilling
• 15 mm inscribed circle (0.5906 inches) with 9-degree relief angle for clearance in tight-tolerance bores
• 0.0313-inch corner radius for a balance of edge strength and surface finish
• Neutral hand orientation for flexible toolholder compatibility

Compatibility

Designed as a DFT-style replacement indexable drill insert for toolholders accepting a Trigon insert with a 15 mm inscribed circle, insert size 090508, and neutral hand orientation. Specific toolholder compatibility should be confirmed against the toolholder manufacturer documentation before ordering.

Installation Notes

Insert replacement should be performed by a qualified machinist or toolroom technician with the machine powered down and the spindle locked. Use the correct torx or hex key specified by the toolholder manufacturer to seat the insert clamp to the proper feel without over-torquing the retention screw. Inspect the insert pocket for chips, debris, or wear before seating the new insert. Always verify insert orientation and hand before resuming cutting operations.