Collis Tool 75024 End Mill Holder CAT40 4 in Projection

Product Description

The COLLIS TOOL 75024 is a CAT40 taper shank end mill holder designed for use in CNC machining centers requiring rigid, accurate tool retention. With a 4-inch projection and a 2.5-inch nose diameter, this holder positions cutting tools at an extended reach while maintaining concentricity and rigidity at the spindle interface. The 75024 supports through-coolant delivery via both through-spindle and DIN flange coolant types, directing fluid directly to the cutting zone for improved chip evacuation and tool life. Machinists and CNC setup technicians install this holder as part of a standard CAT40 tooling assembly.

This end mill holder is suited for vertical and horizontal machining centers equipped with CAT40 spindle tapers. The 4-inch projection makes it appropriate for applications requiring clearance from the spindle face, such as deep-pocket milling or workpiece fixturing with tall clamps. The through-coolant capability supports high-speed cutting operations where flood coolant alone is insufficient. The 3.25-inch flange diameter and 32 mm bore are consistent with standard CAT40 tooling configurations used in production and job-shop environments.

Key Features

• CAT40 taper shank for direct mounting in CAT40-equipped machining center spindles
• 4-inch projection for extended reach in deep-pocket and obstructed-workpiece applications
• 2.5-inch nose diameter provides a robust clamping interface for end mill retention
• Through-coolant compatible via through-spindle and DIN flange coolant delivery
• 32 mm bore diameter accommodates standard end mill shanks in that size range
• 3.25-inch flange diameter consistent with CAT40 tooling standards

Compatibility

Designed as an OEM-style replacement or direct-fit toolholder for machining centers with CAT40 taper spindles requiring through-coolant capability.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Power down the machining center and engage the spindle lock before inserting or removing toolholders. Use a calibrated torque wrench and the appropriate retention knob specification for the machine spindle when securing the CAT40 taper. Inspect the taper bore and spindle for chips or damage before seating the holder, and verify drawbar engagement before initiating any cutting cycle.