Techniks 22911-4FB End Mill Holder CAT40 1/4 in Bore

Product Description

The TECHNIKS 22911-4FB is a CAT40 taper shank end mill holder designed for precision milling applications on CNC machining centers. It accepts a 1/4-inch bore and delivers a 4-inch projection from the spindle face, giving operators clearance for deep-pocket and extended-reach milling operations. The nose diameter measures 25/32 inches, and the holder is built with through-coolant capability, directing coolant flow directly to the cutting zone for improved chip evacuation and tool life. Machinists and CNC setup technicians install this holder as part of the tool assembly process on CAT40-compatible spindles.

This end mill holder is suited for use on CNC vertical and horizontal machining centers equipped with a CAT40 spindle interface. The 4-inch projection makes it appropriate for setups requiring reach beyond standard stub-length tooling, such as deep-cavity milling or workpiece configurations with obstructions near the spindle. Through-coolant support benefits operations running coated carbide end mills where directed coolant improves surface finish and extends tool life. Overall installed length is 6.69 inches.

Key Features

• CAT40 taper shank for compatibility with CAT40 CNC spindle interfaces
• 1/4-inch bore diameter for standard-shank end mills
• 4-inch projection for extended-reach milling setups
• Through-coolant design channels coolant directly to the cutting edge
• 25/32-inch nose diameter for secure clamping and minimal runout
• 6.69-inch overall length for use in standard CAT40 tool assemblies

Compatibility

Designed for use with CAT40 spindle-equipped CNC machining centers accepting 1/4-inch shank end mills with through-coolant tooling systems.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machining center spindle before assembling or disassembling toolholders. Use a proper CAT40 tightening fixture or tool holder stand when torquing the retention knob and end mill set screw - do not hold the taper shank freehand during assembly. Verify through-coolant port alignment with the machine spindle coolant passage before operation.