Robbjack ACH-16 End Mill Holder 3/4 in Weldon Flat

Product Description

The ROBBJACK ACH-16 is a Weldon flat straight shank end mill holder designed for secure tool retention on CNC machining centers and milling machines. It features a 3/4 inch shank diameter and a 1/2 inch hole diameter with through-coolant capability, allowing cutting fluid to reach the tool tip directly for improved chip evacuation and tool life. Overall length is 4.75 inches. This holder is installed by machinists and tooling setup technicians in production and job-shop environments where reliable, repeatable tool holding is required.

This end mill holder is suited for vertical and horizontal milling operations in both production shops and precision machining facilities. The through-coolant design makes it appropriate for deep-pocket milling, drilling, and high-feed applications where flood coolant alone is insufficient. It accepts end mills with a 1/2 inch shank and is used wherever a Weldon flat setscrew-style holder is the specified interface.

Key Features

• 3/4 inch shank diameter with Weldon flat straight shank geometry for positive setscrew drive
• 1/2 inch bore accepts standard 1/2 inch shank end mills
• Through-coolant channel delivers cutting fluid directly to the cutting edge
• 4.75 inch overall length suits a range of standard spindle-to-work clearances
• Compact weight of 0.375 pounds minimizes spindle load

Compatibility

Designed as an OEM-style end mill holder for milling machines and machining centers that accept a 3/4 inch Weldon flat straight shank toolholder with a 1/2 inch bore.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before inserting or removing the holder. Seat the Weldon flat against the setscrew and torque the setscrew according to the machine tool manufacturer specification. Verify runout with a dial indicator before commencing cuts, and confirm the through-coolant port aligns with the machine spindle coolant supply.