Robbjack TR-404-10 Square End Mill 5/16 in 4 Flute Carbide

Product Description

The ROBBJACK TR-404-10 is a solid carbide square end mill designed for precision milling in a wide range of ferrous and non-ferrous materials. Part of the TR-404 series in the Tuffy material grade, it features a 5/16-inch cutting diameter, a 13/16-inch length of cut, and a 2-1/2-inch overall length. The 4-flute, right-hand spiral configuration delivers efficient chip evacuation and a clean finish in slotting, profiling, and peripheral milling operations. This end mill is centercutting, allowing direct plunge entry into the workpiece. It is installed by machinists and toolroom technicians in CNC machining centers and manual mills.

This end mill is suited for general-purpose milling in job shops, production environments, and tool rooms. The regular-length geometry fits standard tool holders without extended-reach adapters. The straight-cylindrical shank accepts ER collets and end mill holders with a 5/16-inch bore. It is appropriate for slotting, side milling, and profiling passes in steel, aluminum, and similar materials where an uncoated carbide tool is specified.

Key Features

• Solid carbide construction in the Tuffy material grade for rigidity and wear resistance
• 4-flute, right-hand cut with right-hand spiral flute for efficient chip removal
• Centercutting design allows plunge milling without a pre-drilled pilot hole
• 30-degree helix angle balances cutting force and surface finish
• Uncoated finish suitable for applications where coating is not required or specified
• Straight-cylindrical shank fits standard ER collets and end mill holders

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers and manual mills using 5/16-inch bore ER collets or end mill holders. Part of the ROBBJACK TR-404 series.

Installation Notes

Installation is performed by a machinist or toolroom technician. Always power down and lock out the spindle before changing tooling. Seat the shank fully in the collet or holder to the recommended gauge-line depth and torque the collet nut per the tool holder manufacturer specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates tool wear and degrades surface finish.