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The HARVEY TOOL 13910-C4 is a miniature solid carbide square end mill designed for high-precision milling in tight tolerances and small-feature applications. It carries a 0.01-inch cutting diameter with a 1/64-inch (0.015-inch) length of cut, making it suited for micro-machining operations where accuracy is critical. The tool features a 30-degree helix angle, right-hand cutting and flute direction, and a centercutting geometry that allows direct plunge entry. An amorphous diamond coating reduces friction and extends tool life when cutting abrasive or composite materials. Machinists and tool-and-die professionals working on CNC machining centers are the primary users of this end mill.
This end mill is built for small-scale precision work in industries such as aerospace, medical device manufacturing, electronics, and mold making where fine detail and tight tolerances are standard requirements. The 0.125-inch shank diameter fits standard collets and tool holders on most CNC milling equipment. At 1.5 inches overall length, the tool maintains rigidity critical to micro-end-mill performance. It is a single-end tool intended for right-hand spindle rotation.
Designed as a direct-fit replacement or standard tooling option for CNC milling operations requiring a 0.125-inch shank, right-hand, single-end square end mill in a micro-diameter configuration.
Installation is performed by qualified machinists on CNC milling equipment. Power down and lock out the spindle before inserting or changing tooling. Ensure the collet and tool holder are clean and free of debris before seating the shank. At this diameter, runout control is critical — use a high-precision collet rated for micro-tooling to minimize deflection and premature tool breakage.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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