Harvey Tool 991940 Square End Mill 5/8 in 4 Flute Carbide

Product Description

The HARVEY TOOL 991940 is a solid carbide square end mill designed for high-precision milling operations in metal, composites, and engineered materials. With a 5/8 inch (0.625 inch) cutting diameter and four flutes, it delivers clean, square-shouldered cuts in profiling, slotting, and finishing passes. The 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. A bright, uncoated finish keeps the carbide substrate exposed for applications where coating buildup would be a concern. Licensed machinists, tool-and-die makers, and CNC operators typically run this tool in vertical or horizontal machining centers.

This end mill suits general-purpose milling work in job shops and production environments. The 15/16 inch (0.938 inch) length of cut and 8 inch overall length make it well suited for applications requiring extended reach, such as deep-pocket milling or clearance-critical setups. The reach length of 5.687 inches gives the tool additional clearance past the spindle nose or fixturing without sacrificing rigidity. Right-hand cutting and right-hand flute direction are standard for conventional spindle configurations.

Key Features

• Solid carbide construction for hardness and thermal resistance in demanding cuts
• Four right-hand flutes with a 30-degree helix angle for efficient chip flow
• Extended reach design with 5.687 inch reach length for deep-pocket access
• Centercutting geometry allows plunge entry into the workpiece
• Bright/uncoated finish for applications where coatings are not required or desired
• Single-end configuration; 5/8 inch shank diameter matches common collet and end mill holder sizes

Compatibility

Designed for use in CNC machining centers, manual knee mills, and similar spindle equipment accepting a 5/8 inch shank. Suitable for right-hand spindle rotation with standard ER, side-lock, or shrink-fit toolholders sized for a 5/8 inch bore.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in an e-stop or lockout condition before changing tooling. Set tool length offset in the machine controller after seating the shank fully into the holder to the minimum recommended insertion depth. Verify runout with a dial indicator before production cuts when tight tolerances are required.