Robbjack TS-401-08 Square End Mill 1/4 in 4 Flute Carbide

Product Description

The ROBBJACK TS-401-08 is a solid carbide square end mill designed for precision milling in demanding machining environments. Part of the TS-401 Series in the Tuffy material grade, this tool features a 0.250-inch mill diameter, a 0.500-inch length of cut, and a 2.000-inch overall length. The 4-flute, right-hand spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. Centercutting capability allows plunge entry into the workpiece. This end mill is uncoated and intended for machinists and tooling professionals working on CNC mills, VMCs, and manual milling machines.

This stub-length end mill is suited for general-purpose milling operations including slotting, profiling, and peripheral milling where rigidity and minimal deflection are priorities. The straight cylindrical shank with a 0.250-inch diameter fits standard ER collets and end mill holders. The compact stub length reduces overhang and increases stability during aggressive cuts. It is appropriate for use in job shops, production environments, and toolroom applications where tight tolerances and consistent tool geometry are required.

Key Features

• Solid carbide Tuffy material grade for wear resistance and rigidity
• 4-flute right-hand cut with right-hand spiral flute and 30-degree helix angle
• Centercutting design allows direct plunge milling
• Stub length at 2.000 inches OAL minimizes deflection and maximizes rigidity
• Mill diameter tolerance of +0.000 / -0.002 inches for consistent fit and finish
• Straight cylindrical shank compatible with standard collet and end mill holder systems

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC and manual milling setups using 1/4-inch collet or end mill holder systems. Part of the ROBBJACK TS-401 Series.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool. Seat the shank fully into the collet or holder to the recommended engagement depth and torque the retention nut per the tool holder specification. Inspect the tool for chips, cracks, or runout before each use.