Cleveland C33373 Square End Mill 9/32 in 4 Flute Hss

Product Description

The CLEVELAND C33373 is a 4-flute, high speed steel square end mill designed for general-purpose milling operations in machine shop and production environments. With a 9/32 inch (0.2813 inch) cutting diameter and a 1-3/8 inch length of cut, it handles slotting, profiling, and peripheral milling in a range of ferrous and non-ferrous materials. The straight cylindrical shank with Weldon flat measures 3/8 inch in diameter, providing secure tool holding in standard end mill holders. The 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. This tool is centercutting, allowing direct plunge entry into the workpiece. It is part of the HG-4C series, a regular-length line intended for standard reach applications.

The C33373 is suited for machining cast iron, non-ferrous metals such as aluminum and brass, and steel alloys. It fits conventional CNC machining centers and manual knee mills running appropriate speeds and feeds for HSS tooling. The uncoated finish makes it a practical choice for shops that regrind tooling in-house, as there is no coating to degrade at the regrind surface. Right-hand cut and right-hand flute geometry match standard spindle rotation in conventional setups. This end mill is sold individually and is appropriate for job shop work, tool room use, and production runs on lighter-duty cuts.

Key Features

• Centercutting geometry allows direct plunge milling without a pre-drilled entry hole
• 30-degree helix angle promotes chip flow and reduces cutting force on the workpiece
• 4-flute configuration provides a good balance of chip clearance and surface finish
• 3/8 inch straight cylindrical shank with Weldon flat for secure clamping in standard holders
• Uncoated high speed steel construction supports in-house regrinding and reconditioning
• Regular-length (HG-4C) series provides rigidity for standard-depth slotting and profiling

Compatibility

Designed for use with standard 3/8 inch end mill holders and collet chucks. Rated for primary workpiece materials including cast iron (K), non-ferrous metals (N), and steel (P) per ISO material group coding. No specific machine model compatibility is listed by the manufacturer for this tool.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and locked out per applicable shop safety procedures. Ensure the Weldon flat is properly aligned with the set screw in the tool holder before tightening to prevent axial pull-out under cutting load. Verify that runout is within acceptable limits after installation using a dial indicator before beginning a cut. Select speeds and feeds appropriate for high speed steel tooling and the specific workpiece material to avoid premature tool wear or breakage.