Kennametal 5534257 Indexable Drill Insert Spgxmd KCU25

Product Description

The KENNAMETAL 5534257 is a solid carbide indexable drill insert in the SPGXMD style, designed for use in indexable insert drills in metalcutting applications. It carries the KCU25 manufacturer grade and features a CVD-applied TiCN and Al2O3 multilayer coating for thermal resistance and wear protection during moderate to aggressive drilling operations. The insert has a 0.3126 inch (7.94 mm) inscribed circle, a thickness of 0.1252 inches, and a 0.40 mm corner radius. The square shape and MD chipbreaker geometry support controlled chip evacuation in through-hole and blind-hole drilling. Licensed machinists and CNC operators are the primary installers.

This insert is suited for production drilling in ferrous and alloy materials where CVD-coated carbide grades are specified. It fits indexable drill bodies that accept SPGX-style square inserts with an 11-degree relief angle and an insert size designation of 070304. The right-hand cutting direction makes it appropriate for standard spindle rotation on CNC machining centers, turning centers with live tooling, and conventional drill presses. Shops running medium to high volumes in steel and cast iron are the primary end users for the KCU25 grade with this coating stack.

Key Features

• SPGXMD insert style with square shape and 11-degree relief angle for positive cutting geometry
• KCU25 fine-grain solid carbide grade with CVD TiCN and Al2O3 coating for wear and thermal resistance
• 0.3126 inch (7.94 mm) inscribed circle with 0.40 mm corner radius for controlled edge engagement
• MD chipbreaker geometry supports chip control in drilling of steel and ferrous alloys
• Right-hand cutting direction, compatible with standard CNC spindle rotation
• Mounting hole diameter of 0.1122 inches (2.85 mm) for secure clamping in insert drill bodies

Compatibility

Designed for use in indexable insert drill bodies that accept SPGX-style square inserts with an insert size designation of 070304 and an 11-degree relief angle. Consult the drill body manufacturer specifications to confirm seat geometry and clamping screw compatibility before installation.

Installation Notes

Insert replacement should be performed by a qualified machinist or tooling technician with the machine spindle fully stopped and the machine locked out per facility LOTO procedures. Use the appropriate Torx or hex key to seat and torque the clamping screw to the drill body manufacturer specification. Inspect the insert pocket for wear or debris before seating a new insert. Do not exceed the recommended cutting parameters for the KCU25 grade as specified in the KENNAMETAL tooling catalog for the target workpiece material.