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

Product Description

The ROBBJACK TR-404-24 is a solid carbide square end mill designed for precision milling in metal, composites, and other hard materials. Part of the TR-404 series in the Tuffy material grade, this tool features a 0.750 inch mill diameter, a 1.5 inch length of cut, and a 4 inch overall length. The straight cylindrical shank measures 0.750 inches in diameter for secure toolholder engagement. With 4 spiral flutes and a 30-degree helix angle, it is built for right-hand cut and right-hand flute rotation. Centercutting capability allows plunge entry. Licensed machinists, CNC operators, and tool-and-die professionals are the primary users of this end mill.

The TR-404-24 is suited for general-purpose milling operations including slotting, profiling, and pocketing in ferrous and non-ferrous metals. The regular-length geometry fits standard machining center setups where tool clearance is not a constraint. The uncoated solid carbide construction performs well in applications where coolant is applied and consistent edge sharpness is required. This is a single-end tool, so once the cutting end is worn, the tool is replaced rather than indexed.

Key Features

• Solid carbide construction in the Tuffy material grade for rigidity and wear resistance
• 4 spiral flutes with a 30-degree helix angle for efficient chip evacuation
• Centercutting design allows direct plunge milling without a pre-drilled entry point
• Right-hand cut and right-hand flute direction for standard CNC spindle compatibility
• Straight cylindrical shank with tight shank diameter tolerance of -0.0001 to -0.0002 inches
• Uncoated finish suitable for use with coolant in a variety of workpiece materials

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide square end mill for standard 3/4 inch toolholders including collet chucks, end mill holders, and shrink-fit systems compatible with straight cylindrical shanks.

Installation Notes

Installation is performed by machining professionals during CNC or manual milling machine setup. Ensure the spindle is fully stopped and the machine is in an E-stop or locked-out state before changing tooling. Seat the shank fully into the toolholder and torque the retention hardware to the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning a production cut, as excessive runout accelerates edge wear on carbide tooling.