Harvey Tool 826878-C3 Square End Mill 5/64 in 4 Flute Carbide

Product Description

The HARVEY TOOL 826878-C3 is a solid carbide square end mill designed for precision milling in demanding machining environments. With a 5/64 inch (0.0780 inch) mill diameter and four flutes, it delivers clean, accurate cuts in a compact profile suited for fine-detail work. The AlTiN coating provides heat resistance and extended tool life at elevated cutting speeds. A 30-degree helix angle balances chip evacuation with cutting stability. This tool is installed by CNC machinists and toolroom operators working on mills, machining centers, and related equipment.

This end mill is well suited for tight-tolerance slotting, profiling, and peripheral milling on small-feature workpieces. The centercutting geometry allows direct plunge entry, expanding its usefulness across a range of toolpaths. The 1/8 inch shank diameter fits standard collets and toolholders common in small-diameter end mill setups. Right-hand cut and right-hand flute configuration follow conventional spindle rotation standards on most CNC platforms.

Key Features

• Solid carbide construction for rigidity and wear resistance in hardened and abrasive materials
• AlTiN finish for high-temperature oxidation resistance and extended tool life
• Centercutting design allows plunge cutting without a pre-drilled entry point
• 30-degree helix angle promotes efficient chip evacuation and smooth cutting action
• Right-hand cut and right-hand flute geometry for use with standard spindle rotation
• Four-flute configuration increases feed rate capability over two- and three-flute alternatives

Compatibility

Designed as an OEM-style solid carbide square end mill for use in CNC machining centers and manual mills accepting a 1/8 inch shank diameter collet or toolholder.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolroom technician. Ensure the spindle is fully stopped and the machine is in a safe, powered-down state before changing tooling. Seat the shank fully within the collet or toolholder to the recommended gauge line and torque the retention mechanism per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning a production cut.