Harvey Tool 39708-C3 Undercut End Mill 1/8 in 4-flute Altin

Product Description

The HARVEY TOOL 39708-C3 is a single-end undercut end mill designed for machining undercuts, reliefs, and dovetail-style profiles in tight workspaces. Built from solid carbide with an AlTiN coating, it delivers heat resistance and tool life in demanding cutting applications. The 4-flute geometry combined with a 270-degree wrap angle provides full radial engagement through undercut passes. The mill measures 0.125 inches in diameter with a 0.107-inch length of cut, a 0.076-inch neck diameter, and a 0.375-inch neck length. Right-hand flute direction and right-hand cutting direction make it compatible with standard spindle setups. It is installed by CNC machinists and tool-and-die professionals working in ferrous and non-ferrous materials.

This undercut end mill is suited for machining internal reliefs, snap-fit grooves, T-slots, and undercut profiles in molds, dies, and precision components. The reduced neck diameter allows access to recessed features without interference. The 1/8-inch shank diameter fits standard collet systems on vertical machining centers and CNC mills. With a 1.5-inch overall length, it is sized for compact, close-tolerance work in both prototype and production environments.

Key Features

• 270-degree wrap angle enables full undercut engagement in a single pass
• AlTiN coating improves heat resistance and extends tool life in harder materials
• Solid carbide construction provides rigidity and dimensional accuracy at small diameters
• 4-flute design balances chip evacuation with surface finish quality
• Reduced neck diameter of 0.076 inches allows reach into recessed or deep-pocket features
• Right-hand cut and right-hand flute direction for compatibility with standard CNC spindle rotation

Compatibility

Designed as an OEM-style replacement and standard catalog undercut end mill for use in 1/8-inch collet or end mill holders on CNC vertical machining centers and milling machines requiring a single-end undercut geometry.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom professional. Ensure the machine spindle is fully stopped and the tool changer or collet is de-energized before inserting or removing the tool. Seat the 0.125-inch shank fully into the collet to the recommended grip length to minimize runout. Do not exceed manufacturer-recommended speeds and feeds for the workpiece material and coating type.