Cleveland C39656 Square End Mill 13/16 in 3 Flute Hss

Product Description

The CLEVELAND C39656 is a 3-flute, single-end square end mill designed for precision milling in ferrous and non-ferrous materials. Built from high speed steel, it offers a cutting diameter of 0.8125 inches (13/16 inches) and a length of cut of 1.875 inches. The 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. It carries a straight cylindrical shank with a Weldon flat at 0.625 inches diameter and an overall length of 4 inches. This is an uncoated, center-cutting tool suitable for plunge and peripheral milling operations. Licensed machinists and toolroom operators are the primary users.

The C39656 is rated for use on cast iron, non-ferrous metals, and steel — covering a broad range of production and maintenance machining applications. Its regular-length geometry suits standard knee mills, CNC machining centers, and manual Bridgeport-style machines where a compact, rigid tool is needed. The center-cutting design allows direct plunge entry without a pilot hole, which is practical in fixturing and cavity work. The HG-3 series designation indicates a general-purpose high speed steel line intended for shops that prefer uncoated tools for regrindability and cost control.

Key Features

• 0.8125-inch (13/16-inch) cutting diameter with 1.875-inch length of cut
• 3-flute spiral geometry for efficient chip flow in ferrous and non-ferrous cuts
• Center-cutting design enables direct plunge entry
• Right-hand cut, right-hand flute configuration
• 30-degree helix angle for smooth chip evacuation
• Straight shank with Weldon flat for positive tool holding
• Uncoated high speed steel — resharpenable for extended tool life

Compatibility

Designed for use in standard end mill holders and Weldon-flat collet chucks accepting a 0.625-inch shank diameter. Rated for primary workpiece materials including cast iron, non-ferrous metals, and steel.

Installation Notes

Installation is performed by qualified machinists following standard toolroom practice. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the Weldon flat against the set screw in the holder to prevent axial pullout under load. Confirm runout with a dial indicator before commencing a cut, and apply appropriate cutting fluid or air blast for the workpiece material being machined.