Robbjack ACH-06 End Mill Holder 1/2 in Weldon Flat

Product Description

The ROBBJACK ACH-06 is a Weldon flat straight shank end mill holder designed for secure tool retention in milling operations. It accepts a 3/16 inch bore and features a 1/2 inch shank diameter with an overall length of 3.5 inches. The through-coolant design channels cutting fluid directly to the tool tip, supporting extended tool life and improved chip evacuation during high-speed machining. This holder is installed by machinists and CNC setup technicians in machine shop environments where precise, rigid tooling is required.

This end mill holder is suited for use in vertical and horizontal milling machines, machining centers, and CNC mills equipped with compatible spindle interfaces. The Weldon flat drive style provides positive rotational engagement, making it appropriate for applications where tool pullout resistance is critical, such as heavy side-milling or interrupted cuts. Its compact 3.5 inch overall length allows fitment in setups with limited spindle-to-workpiece clearance.

Key Features

• Weldon flat straight shank design provides positive rotational drive and resists tool pullout
• Through-coolant capability delivers cutting fluid directly to the cutting edge
• 3/16 inch bore accommodates standard small-diameter end mills
• 1/2 inch shank diameter for compatibility with standard collet chucks and spindle interfaces
• 3.5 inch overall length suits close-clearance milling setups

Compatibility

Designed as an OEM-style end mill holder for milling machines and machining centers accepting a 1/2 inch Weldon flat straight shank with a 3/16 inch bore tool interface.

Installation Notes

Installation and removal should be performed by a qualified machinist or CNC setup technician with the machine powered down and the spindle fully stopped. Use the appropriate Weldon flat set screw torque procedure per the machine tool manufacturer guidelines to secure the end mill without distorting the shank. Verify through-coolant passages are clear before assembly. Always confirm shank diameter and bore size match the intended tooling before installation.