Harvey Tool 76425-C3 Square End Mill 0.025 in 4 Flute Carbide

Product Description

The HARVEY TOOL 76425-C3 is a micro square end mill designed for precision milling in tight tolerances and miniature feature work. Built from solid carbide and finished with an AlTiN coating, this tool handles high-heat applications and abrasive materials while maintaining edge integrity. The 0.025-inch cutting diameter and 0.075-inch length of cut make it well-suited for fine detail passes, small slot milling, and contour work in hardened steels, stainless, and non-ferrous alloys. A 30-degree helix angle promotes smooth chip evacuation, and the centercutting geometry allows direct plunge entry without a pre-drilled pilot hole. Licensed machinists and CNC mill operators are the primary users of this tool.

This end mill is used in CNC machining centers and manual mills where small-diameter tooling is required for micromachining, mold and die detail work, medical component manufacturing, and aerospace part finishing. The 1/8-inch shank diameter fits standard ER collet systems and many small-bore tool holders. With a 1.5-inch overall length, the tool maintains rigidity while providing enough reach for typical shallow-pocket and slot operations in production and prototype environments.

Key Features

• 0.025-inch cutting diameter for micro-scale milling operations
• Solid carbide construction for rigidity and wear resistance
• AlTiN finish improves heat resistance and extends tool life in ferrous materials
• 30-degree helix angle promotes chip flow and reduces cutting forces
• Centercutting design enables direct plunge entry
• Right-hand cut, right-hand flute, 4-flute geometry for smooth finish passes

Compatibility

Designed for use in CNC machining centers and manual mills equipped with 1/8-inch shank tool holders or ER collet chucks. Suitable for micromachining applications in ferrous and non-ferrous materials.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The machine spindle must be fully stopped and locked out before inserting or removing the tool from the collet or tool holder. Verify collet size matches the 1/8-inch shank before tightening. At 0.025 inches in diameter, this tool is extremely fragile — avoid side-loading beyond recommended depths of cut and confirm runout is minimized at setup to prevent premature breakage.