Kennametal 3658851 Corner Radius End Mill 3/4 in 3 Flute

Product Description

The KENNAMETAL 3658851 is a solid carbide corner radius end mill designed for high-performance milling of non-ferrous metals. It features a 3/4 inch mill diameter, a 2.25 inch length of cut, and a 0.06 inch corner radius that reduces stress concentrations at part features and extends tool life compared to sharp-corner end mills. The three-flute, right-hand spiral geometry with a high helix style promotes efficient chip evacuation in aluminum, copper, brass, and similar materials. This is a single-end, centercutting tool, meaning it can plunge directly into a workpiece as well as perform peripheral and slot milling operations. Machinists and CNC operators in production and job-shop environments select this tool for finishing and semi-finishing passes where corner geometry must be held consistently.

The 3658851 is intended for use on non-ferrous metal workpieces and is suited to CNC machining centers, vertical mills, and similar setups where a straight-cylindrical shank is retained in a collet, end mill holder, or hydraulic sleeve. It is compatible with HC 1/2 through HC 1-1/4 hydraulic sleeves inch with inch bores, HC 20M through HC 32M hydraulic sleeves metric with inch bores, and HC-HSK Form A toolholders as specified by the manufacturer. The coarse pitch and high helix promote aggressive material removal rates in non-ferrous applications while keeping cutting forces manageable.

Key Features

• 0.06 inch corner radius reduces notch stress and improves surface finish at part radii
• Solid carbide submicron-grade substrate provides rigidity and wear resistance
• Three right-hand spiral flutes with high helix for efficient chip evacuation in non-ferrous metals
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Bright/uncoated finish suited for non-ferrous materials where coatings may cause built-up edge
• Straight-cylindrical shank compatible with standard collets and hydraulic sleeve toolholders

Compatibility

Compatible with HC 1/2 through HC 1-1/4 hydraulic sleeves inch with inch bores, HC 20M through HC 32M hydraulic sleeves metric with inch bores, and HC-HSK Form A toolholders. Primary workpiece material is non-ferrous metal (material code N). Series AADE. Manufacturers catalog number 4K1319077C.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool changer or spindle lock is engaged before seating or removing the tool. Verify shank runout is within acceptable limits after clamping, as excessive runout accelerates corner radius wear and degrades surface finish. Follow the toolholder manufacturer torque specifications for collet nuts and hydraulic sleeve clamp pressures.