Harvey Tool 73090-C4 Square End Mill 0.090in 4 Flute Carbide

Product Description

The HARVEY TOOL 73090-C4 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. With a 0.090-inch cutting diameter and four flutes, this end mill delivers clean, accurate cuts in a compact form factor. The 30-degree helix angle improves chip evacuation and reduces cutting forces during peripheral and slot milling. An amorphous diamond coating increases surface hardness and lubricity, extending tool life in abrasive and non-ferrous materials. The 0.125-inch shank diameter fits standard collet chucks commonly used in CNC machining centers and manual milling machines. Licensed machinists and CNC operators install this tool in production and prototype environments.

This end mill is suited for small-diameter finish milling, contouring, and slotting in non-ferrous metals, plastics, composites, and graphite. The centercutting geometry allows plunge entry, making it versatile for complex toolpaths. The right-hand cut and right-hand flute configuration is the standard setup for conventional CNC spindle rotation. With a 0.27-inch length of cut and 1.5-inch overall length, this tool is optimized for shallow-to-moderate depth-of-cut applications where rigidity and runout control are critical.

Key Features

• Amorphous diamond coating for enhanced wear resistance and reduced friction on abrasive materials
• Four-flute design increases feed rate capability and improves surface finish compared to two-flute configurations
• 30-degree helix angle promotes efficient chip evacuation and smoother cutting action
• Centercutting geometry allows plunge milling and ramping entry
• Solid carbide construction provides superior rigidity and heat resistance over high-speed steel
• Right-hand cut and right-hand flute for standard CNC and manual mill spindle compatibility

Compatibility

Designed for use in CNC machining centers and manual milling machines equipped with collets or tool holders accepting a 0.125-inch shank diameter.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Secure the shank fully into a collet or end mill holder and torque to the machine manufacturer's specification before starting the spindle. Verify runout with a dial indicator before beginning production cuts. Never exceed the manufacturer's recommended speeds and feeds for the coating and material being machined.