Kennametal 4042934 Spgxmd KCU40 Carbide Drill Insert 0.307 Ic

Product Description

The KENNAMETAL 4042934 is a solid carbide indexable drill insert in the SPGXMD style, designed for use in indexable insert drills in metal-cutting applications. It carries a KCU40 manufacturer grade and features a dual-layer PVD coating of TiN and TiAlN, which provides wear resistance and thermal stability during high-speed drilling operations. The insert has an inscribed circle of 0.307 inches, a thickness of 0.1252 inches, and a corner radius of 0.0313 inches. The MD chipbreaker geometry promotes chip control and efficient evacuation in through-hole and blind-hole drilling. This insert is installed by machinists and toolroom technicians working in production or job-shop environments.

This insert is suited for drilling operations in ferrous and non-ferrous materials where carbide tooling and PVD coatings deliver extended tool life. It fits into the SPGX insert pocket of compatible indexable drill bodies and is a direct replacement style for worn or damaged center or periphery inserts in those systems. Typical applications include production drilling on CNC machining centers and turning centers. The insert size designation is 070308, and the hole diameter is 0.112 inches.

Key Features

• Solid carbide substrate in KCU40 grade for toughness and wear resistance
• Dual-layer PVD coating: TiN and TiAlN for thermal protection and extended tool life
• SPGXMD insert style with MD chipbreaker for controlled chip formation
• 0.307-inch inscribed circle and 0.0313-inch corner radius for precise pocket fit
• 0.112-inch hole diameter for secure screw-down clamping in compatible drill bodies
• Insert size 070308 for straightforward identification and reorder

Compatibility

Designed as an OEM-style replacement insert for indexable drill bodies that accept SPGX-style inserts with a 0.307-inch inscribed circle and 070308 size designation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician with the machine powered down and locked out per facility LOTO procedures. Seat the insert fully into the pocket and torque the clamping screw to the drill body manufacturer's specification — do not estimate clamping torque by feel. Inspect the insert pocket for debris or damage before seating a new insert. Replace both center and periphery inserts as a matched set when wear is observed to maintain hole quality and drill body integrity.