Robbjack T12-403-05 Square End Mill 5/32 in 4 Flute Carbide

Product Description

The ROBBJACK T12-403-05 is a solid carbide square end mill designed for precision milling in metal and non-metal workpiece materials. It features a 5/32 inch (0.1563 inch) mill diameter with a 1/4 inch length of cut, a 3/8 inch straight cylindrical shank, and a 2-1/2 inch overall length. The four-flute, right-hand spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. Built to ROBBJACK Tuffy material grade standards, this stub-length end mill is uncoated and centercutting, making it suitable for slotting, profiling, and plunge operations. Machinists and CNC operators will find it well-suited to close-tolerance work requiring consistent dimensional accuracy.

This end mill belongs to the ROBBJACK T12-403 series and is intended for use in CNC machining centers and manual milling machines where a compact stub-length geometry is preferred for rigidity. The stub length format reduces deflection in demanding cuts. Right-hand cut and right-hand flute orientation suit standard spindle configurations. Its centercutting capability allows direct plunge entry into the workpiece without a pre-drilled hole, adding versatility to finishing and profiling operations in a shop environment.

Key Features

• Solid carbide Tuffy material grade construction for wear resistance and rigidity
• 4-flute, right-hand spiral flute design with 30-degree helix angle for efficient chip flow
• Centercutting geometry enables direct plunge milling without a pilot hole
• Stub-length format minimizes tool deflection in tight setups
• Straight cylindrical shank with tight diameter tolerance for secure collet or chuck holding
• Uncoated finish suitable for applications where coating is not required or where regrinding is planned

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for standard 3/8 inch collets and end mill holders used in CNC machining centers and manual vertical mills requiring a 5/32 inch diameter stub-length square end mill.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the control is in a safe state before changing tooling. Seat the shank fully into the collet or end mill holder to the recommended gauge length and torque the retention hardware per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning a production cut.