Harvey Tool 994578 Corner Radius End Mill 0.078 in 4 Flute

Product Description

The HARVEY TOOL 994578 is a solid carbide corner radius end mill designed for precision milling in demanding applications. Built to a stub length geometry, it features a 0.078 inch cutting diameter, a 0.01 inch corner radius, and four helical flutes with a 30-degree helix angle. The bright, uncoated finish is well-suited for applications where coating is not required or where workpiece material adhesion to coated tools is a concern. This tool is appropriate for machinists, toolroom technicians, and CNC operators working with tight-tolerance parts that require controlled corner break geometry.

This end mill is intended for use in CNC machining centers and manual mills handling a broad range of workpiece materials, including steel, stainless steel, cast iron, non-ferrous metals, aluminum, wood, and composites. Its stub length configuration improves rigidity in tight-clearance setups and short-reach applications. The single-end, right-hand cut and right-hand flute direction are standard for conventional CNC toolholding systems. It is center-cutting, enabling direct plunge entry when required by the operation.

Key Features

• 0.01 inch corner radius with a tolerance of plus 0.001 to minus 0.001 inch for consistent edge geometry
• Solid carbide construction provides rigidity and wear resistance for steel and stainless steel applications
• Four helical flutes with 30-degree helix angle for efficient chip evacuation and smooth surface finish
• Center-cutting design allows direct plunge milling without pre-drilling
• Stub length at 0.279 inch length of cut improves tool stiffness and reduces deflection
• Bright, uncoated finish suitable for a wide range of material types including non-ferrous and composites

Compatibility

Designed for use with standard straight-cylindrical toolholders accepting a 0.125 inch shank diameter. Compatible with CNC machining centers and manual mills equipped for miniature end mill tooling in the stub and standard length series.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Seat the 0.125 inch shank fully and evenly in the toolholder collet before tightening to prevent runout. Verify tool runout with a dial indicator prior to first use, as excessive runout will accelerate edge wear and reduce corner radius accuracy.