Robbjack STR-404-24-A Square End Mill 3/4 in 4 Flute Carbide

Product Description

The ROBBJACK STR-404-24-A is a solid carbide square end mill engineered for precision milling in demanding metalworking and machining applications. This single-end tool features a 3/4 inch cutting diameter, 1-1/2 inch length of cut, and a 4 inch overall length, making it a standard-reach option for slotting, profiling, and peripheral milling. The AlTiN coating provides heat resistance and extended tool life at elevated cutting speeds. Four flutes with a fine pitch and 30-degree helix angle deliver smooth chip evacuation and a quality surface finish. The centercutting geometry allows plunge entry into the workpiece.

This end mill is suited for milling ferrous metals, stainless steels, and hardened alloys in CNC machining centers and manual knee mills. The regular-length configuration fits a wide range of production and job-shop setups. With a right-hand cut and right-hand flute, it is compatible with standard spindle rotation on vertical and horizontal machining centers. The 3/4 inch shank diameter seats securely in collet chucks, end mill holders, and hydraulic toolholders of matching bore size.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN finish for high-heat tolerance and extended tool life
• Centercutting design allows direct plunge entry
• 4 flutes with fine pitch for smooth finish cuts and efficient chip removal
• 30-degree helix angle balances cutting forces and surface quality
• Right-hand cut, right-hand flute for standard CNC spindle compatibility

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for 3/4 inch bore end mill holders, collet chucks, and hydraulic toolholders used in standard CNC and manual milling applications.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the spindle before seating or removing the end mill. Ensure the toolholder bore and shank are clean and free of chips or burrs before clamping. Verify runout with a dial indicator after installation and before beginning a cut to avoid premature tool wear or workpiece damage.