Kennametal 4048689 Corner Chamfer End Mill 0.25in 3 Flute

Product Description

The KENNAMETAL 4048689 is a solid carbide corner chamfer end mill designed for precision chamfering and edge-breaking operations on ferrous and non-ferrous workpieces. It measures 0.25 inches in diameter with a 0.375-inch length of cut and features a 0.0118-inch chamfer width. The AlTiN coating provides thermal resistance and extended tool life in dry or semi-dry cutting environments. With a 20-degree slow helix angle and fine pitch, this single-end mill delivers controlled chip evacuation and smooth finishes on close-tolerance features. It is centercutting and runs in a right-hand cutting direction with spiral flutes.

This end mill is suited for milling operations requiring consistent chamfer geometry on machined components. It fits standard 1/4-inch collets or end mill holders and is appropriate for CNC machining centers and manual mills in precision job shop, aerospace, and general metalworking applications. The 2-inch overall length keeps the tool compact for rigid setups in confined areas. The MDRHEC series designation indicates suitability for high-efficiency roughing and finishing chamfer passes at controlled feed and speed parameters.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding cuts
• AlTiN coating extends tool life in high-temperature dry cutting applications
• 0.0118-inch chamfer width for precise, repeatable edge treatment
• Centercutting design allows plunge entry without a pre-drilled pilot
• Right-hand spiral flutes with 20-degree slow helix for controlled chip flow
• Single-end configuration with 1/4-inch shank for standard collet compatibility

Compatibility

Designed as a direct-fit replacement for 1/4-inch shank end mill holders and collet chucks requiring a corner chamfer end mill in the KENNAMETAL MDRHEC series.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Secure the 1/4-inch shank in a clean, properly torqued collet or end mill holder before operation. Ensure the spindle is fully stopped and the machine is in a safe state before tool changes. Do not exceed the tool manufacturer's recommended speeds and feeds for the workpiece material and coating type.