Accupro 775003 End Mill Holder CAT40 3/16 Inch Through Coolant

Product Description

The ACCUPRO 775003 is a CAT40 taper shank end mill holder designed for precision milling operations in CNC machining centers. It accepts a 3/16 inch bore and delivers a 1.38 inch projection with a 3/4 inch nose diameter. Through coolant is supported via both through-spindle and DIN flange configurations, making this holder suitable for high-speed and high-precision cutting environments. The holder is balanced to 30,000 RPM and maintains a total indicator runout (TIR) of 0.0002 inch, ensuring tight tolerances during production runs. Machinists and CNC setup technicians are the primary installers of this toolholder.

This end mill holder is used in vertical and horizontal CNC machining centers equipped with a CAT40 spindle interface. It is well suited for shops running tight-tolerance work where coolant delivery directly through the tool is required for chip evacuation and heat management. The 30,000 RPM balance rating accommodates high-speed machining applications in both job shop and production environments. The drawbar thread size is 5/8-11, which is standard for CAT40 tooling systems.

Key Features

• CAT40 taper shank for compatibility with standard CAT40 CNC spindles
• 3/16 inch bore diameter for small-diameter end mill shanks
• Through coolant support via through-spindle and DIN flange coolant delivery
• TIR of 0.0002 inch for high-precision runout control
• Balanced to 30,000 RPM for high-speed machining suitability
• Standard 5/8-11 drawbar thread for secure spindle retention

Compatibility

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

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machining center before changing toolholders. Use a proper torque wrench and CAT40 tool tightening fixture when seating the end mill and securing the set screw. Verify TIR with a dial indicator after installation to confirm runout is within tolerance for the application.