Kennametal 4040135 Spgxhp KCU25 Indexable Drill Insert

Product Description

The KENNAMETAL 4040135 is a solid carbide indexable drill insert in the SPGXHP style, designed for use in indexable drilling tool bodies in metal cutting and machining operations. It carries the KCU25 manufacturer grade and features a CVD-applied dual-layer TiCN and Al2O3 coating for extended wear resistance and thermal stability during interrupted cuts and high-speed drilling. The inscribed circle measures 0.307 inches, thickness is 0.1252 inches, and the corner radius is 0.0313 inches. This insert is installed and serviced by machinists and tooling technicians in production and job-shop environments.

This insert is suited for indexable drilling applications in ferrous and general-purpose machining. The SPGX insert style is commonly used in center and peripheral positions within modular drill bodies. The HP chipbreaker geometry promotes efficient chip evacuation during deep-hole drilling operations, making this insert appropriate for CNC machining centers and drill presses running steel and cast iron workpieces at moderate to high feeds.

Key Features

• SPGXHP insert style with HP chipbreaker for controlled chip flow
• KCU25 grade solid carbide substrate for toughness in interrupted cuts
• CVD-applied TiCN and Al2O3 dual-layer coating for wear and heat resistance
• 0.307 inch inscribed circle with 0.0313 inch corner radius
• 0.1120 inch mounting hole diameter for secure seating in drill body
• Material grade C2 and C6 classification for broad ferrous application range

Compatibility

Designed as an OEM-style replacement or direct-fit insert for indexable drill bodies accepting SPGX-style inserts with a 0.307 inch inscribed circle and 0.1120 inch hole diameter. Confirm insert size code 070308 against your toolholder specifications before installation.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before removing or seating any indexable insert. Use the appropriate torx or hex key specified by the drill body manufacturer to achieve proper clamping torque — do not overtighten. Inspect the insert pocket for chips or debris before seating the new insert to ensure full surface contact and accurate positioning.