Harvey Tool 989808 Ball End Mill 0.125 in 3 Flute Carbide

Product Description

The HARVEY TOOL 989808 is a solid carbide ball end mill designed for precision milling of ferrous and non-ferrous metals. With a 0.125 inch cutting diameter and 0.375 inch length of cut, this single-end tool features three helical flutes ground to a variable 42-degree helix angle. The variable helix geometry reduces harmonic vibration during cutting, improving surface finish and extending tool life. At 1.5 inches overall length with a 0.125 inch straight-cylindrical shank, it is sized for use in CNC machining centers and manual milling machines requiring tight-tolerance profiling and contouring work. The uncoated bright finish makes it well suited for applications where coating interaction with the workpiece material is a concern.

This ball end mill is built for roughing operations in steel, stainless steel, cast iron, and non-ferrous metals, covering ISO material classifications P, M, K, and N. It is a standard-length tool appropriate for finish contouring, 3D profiling, and slot milling in parts requiring a 0.0625 inch nose radius. The straight shank is compatible with standard collet and end mill holder tooling systems used in production and job-shop CNC environments.

Key Features

• Variable 42-degree helix angle reduces chatter and harmonic vibration during cut
• Three flutes with helical flute geometry for efficient chip evacuation
• Solid carbide construction provides rigidity and wear resistance in hard materials
• 0.0625 inch nose radius for consistent ball-end profiling and contouring
• Uncoated bright finish suitable across a broad range of workpiece materials
• Mill diameter tolerance of +0.0000 / -0.0020 inches for close-tolerance fitment

Compatibility

Designed for use in steel, stainless steel, cast iron, and non-ferrous metal workpieces. Compatible with standard collet systems accepting a 0.125 inch straight-cylindrical shank with h6 tolerance.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine locked out. Ensure the collet or end mill holder is clean and free of debris before seating the shank to the full grip depth. Follow the machine tool manufacturer guidelines for runout inspection before commencing cutting operations. Apply appropriate speeds and feeds for the specific workpiece material per the toolmaker recommendations.