Kennametal 5066192 Indexable Drill Insert Dfrgd KCU40

Product Description

The KENNAMETAL 5066192 is a solid carbide indexable drill insert designed for use in indexable drilling applications requiring precise hole geometry and reliable edge life. Featuring the DFRGD insert style with a GD chipbreaker, this insert carries a KCU40 grade designation and is PVD-coated with a TiN/TiAlN multilayer finish for enhanced wear resistance and thermal stability. The inscribed circle measures 8 mm (0.3150 inches), with a thickness of 0.1492 inches and a corner radius of 1/64 inch (0.0156 inches). It is suited for metalcutting professionals working in production drilling environments where insert-to-insert consistency and coating durability are critical.

This insert is used in indexable drill bodies that accept DFRGD-style inserts in the corresponding seat size. Typical applications include through-hole and blind-hole drilling operations in ferrous and non-ferrous materials across job shop, aerospace, and general machining environments. The neutral hand designation makes it compatible with standard centerline drill configurations. Install in the correct seat position per the drill body manufacturer specifications, as insert hand and geometry are matched to specific pocket locations.

Key Features

• KCU40 carbide grade with PVD-applied TiN/TiAlN coating for improved wear resistance and edge stability
• GD chipbreaker geometry promotes controlled chip evacuation in drilling operations
• 8 mm inscribed circle (0.3150 inches) with insert size designation 040304
• Corner radius of 1/64 inch (0.40 mm) for defined edge transition at drill periphery
• Neutral hand orientation for use in standard centerline drill body seats
• Solid carbide substrate provides rigidity and dimensional consistency under high feed conditions

Compatibility

Designed as an OEM-style replacement insert for indexable drill bodies that accept DFRGD-style solid carbide inserts with an 8 mm inscribed circle and 040304 insert size designation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before seating or removing inserts. Use the correct torx or hex key as specified by the drill body manufacturer to achieve proper clamping torque — do not overtighten, as carbide inserts are brittle and can fracture under excessive clamp load. Inspect the insert pocket for debris, damage, or wear before seating a new insert to ensure full surface contact and accurate positioning.