Robbjack TS-401-20 Square End Mill 5/8 Inch Solid Carbide

Product Description

The ROBBJACK TS-401-20 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. Built to Series TS-401 specifications, it features a 5/8-inch mill diameter, a 7/8-inch length of cut, and a 3-1/2-inch overall length. The 4-flute, right-hand spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and stable cutting performance. This is an uncoated, centercutting tool, allowing plunge cuts in addition to peripheral and slot milling. It is installed and operated by machinists and CNC programmers in job shops, production facilities, and toolrooms.

The TS-401-20 is suited for stub-length milling applications where rigidity is a priority over extended reach. The 5/8-inch shank diameter matches the mill diameter, making it compatible with standard ER and side-lock toolholders of that bore size. Right-hand cut and right-hand flute orientation follow conventional milling machine spindle standards. The centercutting capability expands its use to ramping and plunge entry without a pre-drilled pilot hole.

Key Features

• Solid carbide construction for hardness, wear resistance, and thermal stability
• 4-flute, 30-degree right-hand spiral flute for balanced chip load and surface finish
• Centercutting design enables plunge, ramp, and slot entry cuts
• Stub-length geometry (7/8-inch LOC) maximizes rigidity and minimizes deflection
• Uncoated finish suitable for use with cutting fluids on a range of workpiece materials
• Mill diameter tolerance of +0.000/-0.003 inches for consistent fit and dimensional accuracy

Compatibility

Designed as an OEM-style solid carbide square end mill for use in standard milling machine and CNC machining center spindles accepting a 5/8-inch shank diameter toolholder.

Installation Notes

Installation is performed by qualified machinists using appropriate toolholders and torque-rated drawbar or collet systems. Ensure the spindle and toolholder are clean and free of chips or runout before seating the shank. Confirm spindle rotation direction matches the right-hand cut orientation of this tool before engaging the workpiece. Follow machine manufacturer guidelines and applicable shop safety protocols when setting cutting parameters.