Cleveland C33451 Square End Mill 7/8 in 4 Flute Hss Tin

Product Description

The CLEVELAND C33451 is a 4-flute, high speed steel square end mill designed for material removal and profiling operations in machine tool applications. Built to the HG-4C series specification, it carries a titanium nitride (TiN) finish that increases surface hardness and extends tool life in demanding cuts. The cutter measures 7/8 inch in diameter with a 5-inch length of cut, making it an extra-long reach tool suited for deep-pocket and deep-slot work. The 30-degree spiral flute geometry promotes efficient chip evacuation, and the centercutting design allows plunge entry. Machinists and CNC operators install this tool in vertical mills, machining centers, and manual knee mills.

The C33451 is rated for use on cast iron, non-ferrous metals, and steel. The extra-long 5-inch length of cut is well suited to deep cavity milling, side wall finishing, and full-depth slotting where standard-length end mills cannot reach. The straight cylindrical shank with Weldon flat accommodates standard side-lock toolholders, reducing pull-out risk under heavy lateral loads. Right-hand cut, right-hand flute orientation is standard for conventional and climb milling on typical CNC and manual setups.

Key Features

• 7/8 inch mill diameter with matching 7/8 inch straight shank for direct toolholder fitment
• 5-inch length of cut rated for deep-pocket and deep-slot machining
• TiN coating improves surface hardness and reduces tool wear on ferrous and non-ferrous workpieces
• 30-degree helix angle promotes chip flow out of deep cuts
• Centercutting geometry allows direct plunge entry without a pre-drilled pilot hole
• Weldon flat on shank for secure side-lock toolholder engagement

Compatibility

Designed for use in standard vertical machining centers, CNC mills, and manual knee mills accepting 7/8 inch straight-shank toolholders. Rated for primary workpiece materials including cast iron, non-ferrous metals, and steel per HG-4C series specifications.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Power down and lock out the spindle before loading or unloading the tool. Seat the Weldon flat against the set screw in the side-lock toolholder to the tool manufacturer's recommended engagement depth to prevent axial pull-out. Verify runout with a dial indicator after seating before commencing a cut, particularly given the extra-long reach of this tool.