Accupro 775007 CAT40 End Mill Holder 1/4 in Bore

Product Description

The ACCUPRO 775007 is a CAT40 taper shank end mill holder designed for precision CNC milling applications. It accepts a 1/4 inch bore and provides a 2.5 inch projection from the spindle face, giving operators clearance for a wide range of end mill lengths. The holder features through-coolant capability, supporting both through-spindle and DIN flange coolant delivery. It is balanced to 30,000 RPM and holds a TIR of 0.0002 inches, making it suitable for high-speed finishing and tight-tolerance work. Machinists and CNC setup technicians are the primary users of this toolholder.

This end mill holder is used in CAT40-spindle machining centers for milling, profiling, slotting, and contouring operations. The through-coolant design directs cutting fluid directly to the tool tip, extending tool life and improving chip evacuation in ferrous and non-ferrous materials. It is a practical choice for production shops running high-RPM spindles where runout control and coolant delivery are critical to part quality.

Key Features

• CAT40 taper shank for direct spindle mounting on CAT40 machining centers
• 1/4 inch bore diameter for standard end mill shanks
• 2.5 inch projection for clearance in deep-reach applications
• Through-coolant compatible via through-spindle and DIN flange delivery
• TIR of 0.0002 inches for high-precision runout control
• Balanced to 30,000 RPM for high-speed machining operations
• 5/8-11 drawbar thread for secure spindle retention

Compatibility

Designed as an OEM-style end mill holder for CAT40-spindle CNC machining centers equipped with through-spindle or DIN flange coolant systems.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the spindle drive before inserting or removing the toolholder. Use the appropriate torque wrench and collet nut spanner to secure the end mill to manufacturer-specified clamping torque — do not overtighten by hand or use impact tools. Verify runout at the tool tip with a dial test indicator after installation before initiating any cutting cycle.