Cleveland C33071 Square End Mill 5/16 in 4 Flute Hss

Product Description

The CLEVELAND C33071 is a double-end square end mill designed for precision milling operations in ferrous and non-ferrous metals. Manufactured from high speed steel with a titanium nitride (TiN) finish, it offers increased surface hardness and wear resistance compared to uncoated HSS tooling. The 5/16 inch cutting diameter pairs with a 3/4 inch length of cut and a 30-degree helix angle to promote efficient chip evacuation. With four spiral flutes and centercutting capability, this end mill handles slotting, profiling, and plunge cutting in a single tool. It is sized for use in manual mills and CNC machining centers with standard collet or end mill holders.

The C33071 belongs to the Cleveland HD-4C series, a regular-length line intended for general-purpose milling in job shops, maintenance facilities, and production environments. Its right-hand cut and right-hand flute configuration suits standard spindle rotation on vertical mills. The 3/8 inch straight-cylindrical shank with Weldon flat accommodates both collet chucks and set-screw style holders. Primary workpiece materials include cast iron, non-ferrous metals, and steel, making it a versatile choice across common trade applications.

Key Features

• Double-end design doubles tool life before replacement is required
• TiN coating increases surface hardness and reduces friction against workpiece material
• Centercutting geometry allows direct plunge entry without pre-drilling
• 30-degree helix angle promotes smooth chip flow in steel and non-ferrous cuts
• Weldon flat on shank prevents slippage under heavy side loads
• Four-flute configuration balances chip clearance with surface finish quality

Compatibility

Designed for use in standard end mill holders, collet chucks, and Weldon-style set-screw holders accepting a 3/8 inch shank. Rated for milling cast iron, non-ferrous metals, and steel workpieces per Cleveland HD-4C series specifications.

Installation Notes

Installation and tool changes should be performed with the machine spindle fully stopped and locked out per applicable machine safety procedures. Ensure the holder bore and shank are clean and free of chips before seating the tool. Align the Weldon flat with the set screw when using a side-lock holder to prevent axial pullout under cutting loads. Feed rate and spindle speed should be set per published HSS cutting data for the specific workpiece material.