Robbjack T12-405-05 Square End Mill 5/32 in 4 Flute Carbide

Product Description

The ROBBJACK T12-405-05 is a solid carbide square end mill designed for precision milling operations in metal, composites, and other hard materials. Part of the T12-405 series in the Tuffy material grade, this tool features a 5/32-inch (0.1563-inch) cutting diameter and a 9/16-inch length of cut. The 4-flute, right-hand spiral configuration provides efficient chip evacuation and a smooth finish in both roughing and finishing passes. The centercutting design allows for direct plunge entry. This end mill is installed and operated by machinists and CNC programmers in job shop, production, and tool room environments.

This end mill is suited for slot milling, peripheral milling, and plunge operations on CNC machining centers and manual mills. The 3/8-inch straight cylindrical shank fits standard collet chucks and end mill holders. The 2-1/2-inch overall length and regular-length designation make it appropriate for general-purpose work where extended reach is not required. The uncoated solid carbide construction performs well in applications where coating is not specified or where regrinding is anticipated.

Key Features

• Solid carbide Tuffy-grade construction for wear resistance in demanding cuts
• Centercutting design permits direct plunge milling without a pre-drilled entry hole
• 4-flute right-hand spiral with 30-degree helix angle for balanced chip load and surface finish
• Uncoated finish suitable for regrinding and applications where coatings are not required
• Straight cylindrical shank with tight diameter tolerance for secure collet engagement
• Square end profile for flat-bottom slots, shoulders, and step milling

Compatibility

Designed as an OEM-style replacement or standard tooling selection for 3/8-inch collet chucks, end mill holders, and similar tool-holding systems used on CNC and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully into the collet or holder to the recommended engagement depth and torque the retention hardware to the tool-holder manufacturer specification. Verify runout with a dial indicator before commencing cuts.