Accupro 775014 End Mill Holder CAT40 3/8 Inch Through Coolant

Product Description

The ACCUPRO 775014 is a CAT40 taper shank end mill holder designed for precision milling operations on CNC machining centers. It accepts a 3/8 inch bore and features a 1 inch nose diameter with a 2.5 inch projection, providing clearance and rigidity for a wide range of end mill applications. Through-spindle and DIN flange coolant delivery is supported, directing coolant directly to the cutting zone for improved tool life and chip evacuation. The holder is balanced to 30,000 RPM and holds a total indicator runout (TIR) of 0.0002 inch, making it suitable for high-speed and high-precision work. Licensed machinists and CNC operators are the primary installers of this toolholder.

This end mill holder is intended for use in CNC vertical and horizontal machining centers equipped with a CAT40 spindle interface. The 2.5 inch projection suits standard end milling, slotting, and profiling operations where moderate reach is required. The through-coolant capability makes it particularly well suited for cutting harder materials or deep-pocket work where flood coolant alone is insufficient. The 5/8-11 drawbar thread is the standard fastener size for CAT40 tooling systems.

Key Features

• CAT40 taper shank for compatibility with standard CAT40 machining center spindles
• 3/8 inch bore accommodates common end mill shank sizes
• 2.5 inch projection provides reach for standard milling applications
• Through-spindle and DIN flange coolant delivery for improved tool life and chip control
• Balanced to 30,000 RPM for high-speed machining
• TIR of 0.0002 inch for precise, repeatable cutting performance

Compatibility

Designed as an OEM-style toolholder for CNC machining centers with a CAT40 spindle interface and a 5/8-11 drawbar thread.

Installation Notes

Installation and tool changes should be performed by a qualified CNC operator or machinist with the spindle fully stopped and the machine in a safe, locked-out state. Use a proper CAT40 tightening fixture or toolholder stand and a calibrated torque wrench when securing the drawbar to avoid damaging the spindle or holder taper. Inspect the taper shank and spindle bore for nicks, chips, or contamination before seating the holder. Verify coolant port alignment if through-coolant is being used before resuming operation.