Robbjack STR-404-24-C Square End Mill 3/4 Inch 4 Flute Carbide

Product Description

The ROBBJACK STR-404-24-C is a solid carbide square end mill designed for precision milling in demanding metalworking and machining applications. With a 3/4 inch cutting diameter, 1-1/2 inch length of cut, and 4-inch overall length, this tool handles slotting, profiling, and peripheral milling in a single-end configuration. The TiCN (Titanium Carbonitride) finish improves surface hardness and wear resistance compared to uncoated carbide. The 30-degree helix angle promotes smooth chip evacuation and reduces cutting forces. Four flutes provide a balance of chip clearance and edge strength suited to finish and semi-finish milling operations. Licensed machinists and CNC programmers will find this tool well-suited for production environments.

This end mill is built for use in CNC machining centers and manual knee mills where a 3/4 inch shank is standard. The centercutting geometry allows direct plunge entry into a workpiece, making it flexible for ramping and plunging operations. Right-hand cut with right-hand flute direction is the conventional configuration compatible with standard spindle rotation on most vertical and horizontal machining centers. The fine pitch and regular length classification place this tool in everyday production and toolroom work rather than extended-reach or high-feed specialty applications.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• TiCN finish for increased surface hardness and extended tool life over uncoated carbide
• 30-degree helix angle promotes efficient chip evacuation and smooth cutting action
• Centercutting design allows direct plunge and ramp entry without a pre-drilled pilot hole
• Right-hand cut, right-hand flute - standard configuration for conventional CNC spindle rotation
• Fine pitch, 4-flute geometry balances chip clearance with surface finish quality

Compatibility

Designed as a standard 3/4 inch shank square end mill compatible with ER, CAT, BT, and HSK toolholders accepting 3/4 inch straight shanks on CNC machining centers and manual milling machines.

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 a safe, locked-out state before changing tooling. Seat the shank fully in the toolholder and torque the retention mechanism to the toolholder manufacturer's specification. Verify runout with a dial indicator before beginning a production cut, as excessive runout accelerates wear and degrades surface finish.