Kennametal 3876364 Corner Radius End Mill 1/4 in 2 Flute Carbide

Product Description

The KENNAMETAL 3876364 is a solid carbide corner radius end mill designed for precision milling of non-ferrous metals. It features a 1/4 inch diameter, a 1 inch length of cut, and a 0.03 inch corner radius that reduces stress concentration at the cutting edge and improves surface finish in profiling and slotting operations. With 2 flutes, a high helix angle of 45 degrees, and a coarse pitch, this tool is optimized for material removal in aluminum, copper, brass, and similar non-ferrous workpiece materials. The bright uncoated finish suits applications where coating interaction with the workpiece is undesirable. Licensed machinists and CNC setup technicians are the primary installers and operators of this tool.

The 3876364 belongs to the KENNAMETAL AADF series, a long-length end mill line intended for applications requiring extended reach into deep pockets or stepped features. With a 3 inch overall length and a straight cylindrical 1/4 inch shank, it seats directly into standard collet chucks or hydraulic toolholders with matching bore sizes. It is rated for roughing material removal operations in non-ferrous metal applications. KENNAMETAL specifies compatibility with HC 1/2 through HC 1 1/4 hydraulic sleeves in inch bore sizes and HC 20M through HC 32M hydraulic sleeves in metric sleeves with inch bores.

Key Features

• Solid carbide submicron-grade construction for rigidity and edge retention in non-ferrous milling
• 0.03 inch corner radius reduces edge chipping and improves workpiece surface finish
• 45-degree high helix angle promotes efficient chip evacuation in aluminum and other gummy non-ferrous materials
• Centercutting design allows plunge entry without a pre-drilled pilot hole
• Right-hand flute direction and right-hand cutting orientation; compatible with standard CNC spindle rotation
• Bright uncoated finish; no coating reaction risk with non-ferrous workpiece materials
• Long-length classification with 3 inch OAL for deep-pocket and extended-reach applications

Compatibility

Compatible with HC 1/2 through HC 1 1/4 hydraulic sleeves with inch bores and HC 20M through HC 32M hydraulic sleeves with inch bores. Accepts standard 1/4 inch straight cylindrical shank collets and chucks. Intended for non-ferrous metal workpiece materials as designated by primary workpiece material code N.

Installation Notes

Installation and operation should be performed by a qualified machinist or CNC technician familiar with rotating cutting tool safety practices. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool from the toolholder. Verify that the toolholder bore and collet are clean and free of chips before seating the shank to maintain runout tolerances within the shank diameter tolerance of +0.00000 to -0.00035 inches. Follow machine manufacturer guidelines and applicable shop safety standards for tool overhang, feed rate, and depth of cut when setting up roughing passes in non-ferrous material.