Robbjack TS-401-12 Square End Mill 3/8 in 4 Flute Carbide

Product Description

The ROBBJACK TS-401-12 is a solid carbide square end mill designed for precision milling in metal, composites, and other hard materials. Part of the TS-401 Series, this stub-length tool features a 3/8 inch cutting diameter, 5/8 inch length of cut, and a 30-degree helix angle with four right-hand spiral flutes. The centercutting geometry allows both plunge and peripheral cutting operations. At 2-1/2 inches overall length with a straight cylindrical 3/8 inch shank, it fits standard collet chucks and tool holders used in CNC machining centers and manual mills. Machinists and toolroom operators use this uncoated carbide end mill for slotting, profiling, and contouring applications.

The TS-401-12 is suited for light to moderate material removal in ferrous and non-ferrous workpieces where a stub-length tool provides added rigidity and reduced deflection. The Tuffy material grade solid carbide construction handles demanding cuts with consistent dimensional accuracy. The uncoated finish makes it a solid baseline choice for general-purpose milling or applications where coating compatibility with cutting fluids or materials is a consideration. CNC machinists and manual mill operators working in job shop or production environments will find this tool appropriate for finish and semi-finish milling passes.

Key Features

• Solid carbide Tuffy grade construction for durability in demanding milling applications
• Four right-hand spiral flutes with 30-degree helix angle for efficient chip evacuation
• Centercutting design enables plunge entry and slot milling
• Stub length at 5/8 inch LOC provides increased rigidity and reduced deflection
• Straight cylindrical shank fits standard collet chucks and end mill holders
• Uncoated finish suitable for general-purpose use across a range of workpiece materials

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide square end mill for standard 3/8 inch collet chucks, shrink-fit holders, and end mill holders used in CNC machining centers and manual vertical mills.

Installation Notes

Installation should be performed by a qualified machinist following shop safety protocols. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the shank to the recommended engagement depth in the tool holder and torque the collet nut or set screw per the tool holder manufacturer specifications. Verify runout with a dial indicator before beginning cuts, as excessive runout accelerates tool wear and reduces dimensional accuracy.