Accupro 775006 End Mill Holder CAT40 1/4 Inch Through Coolant

Product Description

The ACCUPRO 775006 is a CAT40 taper shank end mill holder designed for precision milling applications in CNC machining centers. It accepts a 1/4 inch tool bore with a 1.38 inch projection and features through-coolant capability, supporting both through-spindle and DIN flange coolant delivery. The holder is balanced to 30,000 RPM, making it suitable for high-speed machining operations where runout control is critical. A TIR of 0.0002 inches ensures tight concentricity, which directly affects surface finish and tool life. The drawbar thread is 5/8-11, standard for CAT40 tooling systems. Licensed machinists and CNC setup technicians are the primary users of this holder.

This end mill holder is used in vertical and horizontal CNC machining centers equipped with CAT40 spindle interfaces. It is suited for production environments running high-speed finishing passes or precision contouring operations where coolant delivery through the tool is required for chip evacuation and thermal management. The 1.38 inch projection provides adequate reach for most standard end mill applications without sacrificing rigidity. Typical installation occurs during tooling setup by machining center operators or CNC programmers managing tool libraries.

Key Features

• CAT40 taper shank for compatibility with standard CNC machining center spindles
• 1/4 inch tool bore with 1.38 inch projection for standard end mill setups
• Through-coolant design supporting through-spindle and DIN flange coolant delivery
• Balanced to 30,000 RPM for high-speed machining applications
• TIR of 0.0002 inches for precise concentricity and extended tool life
• 5/8-11 drawbar thread, standard for CAT40 tooling systems

Compatibility

Designed as an OEM-style replacement and standard fitment for CNC machining centers with CAT40 spindle interfaces requiring a 1/4 inch bore end mill holder with through-coolant capability.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician with the spindle fully stopped and the machine placed in a safe lockout state. Use the appropriate spanner wrench and torque to the machining center manufacturer's specifications for CAT40 tooling. Ensure the tool bore and taper surfaces are clean and free of chips or coolant residue before seating the holder. Verify drawbar engagement on the 5/8-11 thread before releasing the tool changer or manual drawbar mechanism.