Cleveland C41691 Keyway End Mill 0.75 in 2 Flute Hss

Product Description

The CLEVELAND C41691 is a 2-flute high speed steel keyway end mill designed for milling keyway slots and similar finishing operations on metal workpieces. With a 0.75-inch cutting diameter and a 1.3125-inch length of cut, it removes material efficiently while maintaining tight tolerances. The straight shank with Weldon flat provides positive drive and resists pullout in collet or Weldon-style holders. A 30-degree helix angle promotes smooth chip evacuation, and the centercutting geometry allows plunge entry directly into the workpiece without a pre-drilled hole.

This end mill is suited for finishing passes in keyway slot applications on ferrous and non-ferrous metals in both manual and CNC machining environments. The uncoated high speed steel construction makes it a practical choice for shops that resharpen tooling in-house. Machinists and toolroom technicians in maintenance, repair, and production settings typically select this tool when cutting keyways for shaft-to-hub assemblies and similar precision fits.

Key Features

• 0.75-inch cutting diameter with a mill diameter tolerance of +0.0000 / -0.0015 inches for precise slot sizing
• 1.3125-inch length of cut accommodates standard keyway depths
• 2-flute spiral geometry with 30-degree helix for efficient chip removal
• Centercutting design allows direct plunge entry without a starter hole
• Straight shank with Weldon flat prevents rotational slippage under load
• Uncoated high speed steel construction supports in-house resharpening

Compatibility

Designed for use in standard 0.75-inch end mill holders, collet chucks, or Weldon-style holders on vertical milling machines and CNC machining centers performing keyway finishing operations.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine fully powered down and the spindle locked. Secure the Weldon flat against the set screw in the holder to the appropriate holder specification before engaging the spindle. Verify runout with a dial indicator after mounting and before cutting to confirm the tool seats correctly. Follow all applicable shop safety procedures and machine manufacturer guidelines during tooling changes.