Harvey Tool 854816-C6 Square End Mill 1/4 Inch 7 Flute

Product Description

The HARVEY TOOL 854816-C6 is a 7-flute solid carbide square end mill designed for high-performance milling in hardened steels, stainless steel, and cast iron. With a 1/4 inch cutting diameter and a 3/4 inch length of cut, this single-end tool handles demanding applications in materials ranging from 45 to 68 Rc hardness. The AlTiN coating improves heat resistance and extends tool life in abrasive, high-temperature cutting conditions. A 20-degree variable helix geometry reduces chatter and harmonics during aggressive passes, making this end mill well suited for precision work in hard materials where tool deflection and vibration are critical concerns.

This end mill is intended for use in CNC machining centers and manual milling machines where tight tolerances in hardened ferrous materials are required. It is part of the Harvey Tool End Mills for Hardened Steels series and targets applications in tool and die, mold making, and aerospace component machining. The right-hand cut and right-hand flute configuration make it compatible with standard spindle setups. This tool is typically run by machinists and CNC programmers working with P, M, K, and H material classifications per ISO cutting material codes.

Key Features

• 7-flute geometry increases chip load capacity and improves surface finish in hardened materials
• AlTiN coating provides high heat resistance and oxidation resistance for dry and semi-dry cutting
• 20-degree variable helix reduces vibration and chatter during aggressive milling passes
• Solid carbide construction delivers rigidity and wear resistance in steels up to 68 Rc
• Single-end design with right-hand cut and right-hand spiral fluting for standard CNC spindle use
• Non-centercutting — not suitable for direct plunge operations

Compatibility

Designed for milling steel, stainless steel, cast iron, and hardened materials in the 45 to 68 Rc range. Part of the Harvey Tool End Mills for Hardened Steels - Square series. Fits standard 1/4 inch collets and tool holders.

Installation Notes

Installation is performed by machinists using a 1/4 inch collet or end mill holder in a CNC machining center or manual vertical mill. Ensure the tool holder is clean and free of debris before seating the shank to the correct insertion depth. This tool does not support coolant-through delivery and is not designed for plunge cutting — ramp or helical entry paths should be used instead. Verify spindle speed and feed rate against the manufacturer cutting data for hardened material grades before engaging the workpiece.