Cleveland C41685 Keyway End Mill 0.5 in 2 Flute Hss

Product Description

The CLEVELAND C41685 is a 2-flute high speed steel keyway end mill designed for precision milling and finishing operations in metalworking applications. With a 0.5 inch cutting diameter and a 1 inch length of cut, this end mill delivers controlled material removal in keyway slots and similar features. The straight shank with Weldon flat provides secure tool holding in standard end mill holders. A 30-degree helix angle promotes smooth chip evacuation, and the centercutting geometry allows direct plunge entry into the workpiece. The uncoated HSS construction suits a wide range of ferrous and non-ferrous materials at moderate cutting speeds.

This end mill is suited for manual mills, CNC machining centers, and knee mills in job shop, maintenance, and tool room environments. It is commonly used by machinists cutting keyways in shafts, fitting mechanical keys, and performing light finishing passes in steel, aluminum, and similar workpiece materials. The 0.5 inch shank diameter and 3.25 inch overall length make it compatible with standard R8, CAT, and BT tooling setups found in typical machine shop configurations.

Key Features

• 2-flute geometry optimized for keyway slotting and finishing cuts
• Centercutting design allows direct plunge milling without a pre-drilled hole
• 30-degree helix angle promotes chip flow and reduces cutting pressure
• Weldon flat on shank resists pullout under side-load conditions
• Uncoated high speed steel construction suits general-purpose metalworking
• Mill diameter tolerance of +0.0000 / -0.0015 inches for consistent slot fit

Compatibility

Designed as a general-purpose keyway end mill for use in standard 0.5 inch end mill holders across manual and CNC milling machines. Listed under CLEVELAND series HG-2K.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and the spindle at rest. A licensed machinist or trained toolroom operator should set tool runout and confirm holder torque to the machine manufacturer specification before cutting. Inspect the Weldon flat seating in the set screw holder to ensure full contact before engaging the workpiece. Follow applicable shop safety procedures and machine-specific operating guidelines when selecting feeds and speeds for the workpiece material.