Cleveland C33089 Square End Mill 11/16 in 4 Flute Hss Tin

Product Description

The CLEVELAND C33089 is a double-end, four-flute square end mill manufactured from high speed steel (HSS) with a titanium nitride (TiN) coating. It measures 11/16 inches (0.6875 inches) in diameter with a 1-5/8 inch length of cut and a 5-5/8 inch overall length. The TiN finish improves surface hardness and extends tool life in abrasive cutting applications. A 30-degree helix angle and spiral flute geometry promote chip evacuation and reduce cutting forces. This tool is center-cutting, allowing direct plunge entry, and is designed for use by machinists and tool-and-die professionals in manual or CNC milling operations.

The C33089 is suited for milling cast iron, aluminum and non-ferrous metals, and steel. Its Weldon flat shank provides positive drive retention in standard end mill holders. The double-end design effectively extends tool life by offering a second usable cutting end. Regular-length geometry makes it appropriate for general-purpose slotting, peripheral milling, and shoulder milling in both job-shop and production environments where a fractional-inch HSS end mill is specified.

Key Features

• Double-end design provides two cutting ends for extended tool service life
• TiN coating improves wear resistance and reduces friction on the cutting edge
• Center-cutting geometry allows direct plunge milling without a pre-drilled hole
• 30-degree helix angle with spiral flutes promotes efficient chip evacuation
• Weldon flat shank ensures positive drive and reduces tool pull-out risk
• Right-hand cut and right-hand flute configuration for standard milling spindles

Compatibility

Designed for use in standard 3/4 inch end mill holders or collet chucks. Compatible with primary workpiece materials including cast iron, aluminum and non-ferrous metals, and steel as specified in the HD-4C-TN series.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's tooling and speed-and-feed guidelines. Ensure the spindle is fully stopped and the machine is powered down before changing or adjusting tooling. Secure the Weldon flat shank firmly in the holder set screw to prevent rotation during heavy cuts. Inspect both cutting ends for chipping or wear before use and do not use a damaged tool.