Robbjack TR-404-12 Square End Mill 3/8 in 4 Flute Carbide

Product Description

The ROBBJACK TR-404-12 is a solid carbide square end mill designed for precision milling operations in metal, composites, and other hard materials. It features a 3/8 inch cutting diameter, a 7/8 inch length of cut, and a 2-1/2 inch overall length. With 4 spiral flutes and a right-hand cut with right-hand flute direction, this end mill delivers efficient chip evacuation and consistent surface finishes. The straight cylindrical shank measures 3/8 inch in diameter, making it compatible with standard collets and tool holders. This tool is uncoated and falls under ROBBJACK's Tuffy material grade, suited for demanding machining environments.

The TR-404-12 is intended for use in vertical machining centers, CNC mills, and manual knee mills across job shop and production environments. Its centercutting capability allows it to plunge directly into the workpiece, expanding its utility for slotting, profiling, and pocket milling operations. The regular length configuration suits standard depth-of-cut requirements encountered in most general-purpose milling applications. Machinists, tool-and-die makers, and CNC operators working in aerospace, automotive, and general fabrication environments will find this a reliable general-purpose end mill.

Key Features

• Solid carbide construction in ROBBJACK Tuffy grade for rigidity and wear resistance
• 4 spiral flutes with 30-degree helix angle for efficient chip flow
• Centercutting design enables direct plunge entry without a pilot hole
• Right-hand cut and right-hand flute direction for standard spindle operation
• Straight cylindrical shank for use with standard ER collets and end mill holders
• Uncoated finish suitable for use with coolant in a wide range of workpiece materials

Compatibility

Designed as an OEM-style solid carbide square end mill in the ROBBJACK TR-404 series, compatible with any tool holder or collet system accepting a 3/8 inch straight cylindrical shank.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Seat the shank fully into the collet or holder to the recommended gauge length and torque the retention mechanism per the tool holder manufacturer's specification. Verify runout with a dial indicator before beginning the cut, as excessive runout accelerates tool wear and degrades surface finish.