Collis Tool 75023 CAT40 End Mill Holder Through Coolant

Product Description

The COLLIS TOOL 75023 is a CAT40 taper shank end mill holder designed for use on CNC machining centers requiring precision tool retention and through-coolant capability. The holder accepts end mills via a straight-bore chuck with a 25.00 mm (approximately 0.984 inches) hole diameter and delivers coolant directly through the spindle and DIN flange interface. With a 4-inch projection and a 3.250-inch flange diameter, this holder positions the cutting tool at a consistent, repeatable standout from the spindle face. It is installed and serviced by machinists and CNC setup technicians in production or job-shop environments.

This end mill holder is suited for vertical and horizontal CNC machining centers equipped with a CAT40 spindle taper. The through-coolant design supports high-speed and deep-reach machining operations where flood coolant alone is insufficient for chip evacuation or thermal management. The 2-3/8 inch nose diameter and 6.687-inch overall length make it appropriate for applications requiring moderate projection without excessive overhang. Facilities running coolant-through tooling programs will find the dual coolant path - through-spindle and DIN flange - useful for a range of milling operations.

Key Features

• CAT40 taper shank for positive drive and repeatable tool positioning on compatible machining centers
• 4-inch projection (4.0000 inches decimal) for consistent tool standout from spindle face
• Through-coolant compatible via both through-spindle and DIN flange coolant paths
• 25.00 mm bore hole diameter for precise end mill seating
• 3.250-inch flange diameter provides stable, balanced retention at the spindle interface
• Overall length of 6.687 inches suits moderate-reach milling setups

Compatibility

Designed for use with CAT40 spindle taper machining centers equipped for through-spindle or DIN flange coolant delivery.

Installation Notes

Installation and tool changes on CNC machining centers must be performed with the spindle fully stopped and the machine in a safe, locked-out state per facility lockout/tagout procedures. Use the appropriate spanner wrench and pull stud torque specifications defined by the machining center manufacturer when seating the holder in the spindle. Ensure coolant passages are clear and free of debris before engaging through-coolant flow. Verify tool runout with a dial indicator after installation before resuming production cuts.