Collis Tool 85104 End Mill Holder CAT40 1 Inch Hole

Product Description

The COLLIS TOOL 85104 is a CAT40 taper shank end mill holder designed for secure tool retention in CNC machining centers and manual milling machines. It accepts end mills and cutting tools with a 1-inch bore diameter and delivers a 9-inch projection from the spindle face, making it suited for applications requiring extended reach. The nose diameter measures 1-5/8 inches and the overall length is 11.687 inches. Machinists and tool-room technicians use this holder where rigid, accurate tool holding is required for milling, slotting, and profiling operations.

This end mill holder is intended for use in machining centers equipped with a CAT40 spindle interface, which is a widely used taper standard in CNC milling environments across job shops, production facilities, and maintenance machine shops. The 9-inch projection makes it appropriate for deep-cavity work or setups where clearance between the spindle and workpiece requires extended tooling. Standard set-screw retention secures the end mill within the bore. No through-coolant is provided with this holder.

Key Features

• CAT40 taper shank for compatibility with CAT40-equipped spindles
• 1-inch bore diameter accepts standard 1-inch shank end mills and cutting tools
• 9-inch projection for extended reach in deep-cavity or clearance-limited setups
• 1-5/8 inch nose diameter
• Overall length of 11.687 inches for predictable tool-length offsets
• No through-coolant - suitable for standard flood or mist cooling setups

Compatibility

Designed for use with CNC machining centers and milling machines fitted with a CAT40 spindle taper interface, accepting 1-inch shank cutting tools.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing tool holders. Use the appropriate CAT40 pull stud and a face mill arbor wrench or torque arm to seat and secure the holder in the spindle; refer to machine manufacturer specifications for drawbar torque. Inspect the taper shank and spindle bore for nicks, chips, or contamination before mounting to ensure accurate runout.