Accupro 772204 End Mill Holder CAT50 2 Inch Hole

Product Description

The ACCUPRO 772204 is a CAT50 taper shank end mill holder designed for secure, high-precision tool clamping in CNC machining centers. It accepts a 2-inch hole diameter and delivers a 3.625-inch projection, positioning the cutting tool accurately relative to the spindle face. With a total indicator runout (TIR) of 0.0002 inches (0.005 mm), this holder maintains tight concentricity tolerances essential for finish milling and heavy material removal. Through-spindle and DIN flange coolant delivery is supported, directing coolant directly to the cutting zone. Machinists and CNC setup technicians install this holder in standard CAT50-spindle vertical and horizontal machining centers.

This end mill holder is suited for production and job-shop environments running CAT50-taper machining centers. The 3.875-inch nose diameter and 3.34-inch clamping depth provide rigid support for large-diameter end mills in demanding cutting applications. The drawbar and retention knob thread size of 1-8 conforms to standard CAT50 tooling conventions. Through-coolant capability makes this holder well matched to deep-pocket milling, slotting, and high-feed operations where chip evacuation and tool cooling are critical. The holder is balanced to 50,000 RPM, supporting use on high-speed spindle platforms.

Key Features

• CAT50 taper shank for direct mounting in CAT50-spindle machining centers
• 2-inch hole diameter with 3.34-inch clamping depth for secure large-bore end mill retention
• 3.625-inch projection for extended reach applications
• TIR of 0.0002 inches (0.005 mm) for high-concentricity tool holding
• Through-spindle and DIN flange coolant delivery directs coolant to the cutting edge
• Balanced to 50,000 RPM for compatibility with high-speed spindle configurations

Compatibility

Designed as an OEM-style replacement and standard tooling solution for CAT50-spindle vertical and horizontal machining centers accepting 1-8 drawbar and retention knob thread sizes.

Installation Notes

Installation and removal should be performed by a qualified CNC machinist or toolroom technician with the machine in an E-stop or powered-down state and the spindle fully locked. Use a calibrated torque wrench and the appropriate retention knob driver to seat the drawbar to the spindle manufacturer's specified engagement. Verify TIR at setup using a dial test indicator before running any cutting program. Inspect the taper shank and spindle bore for nicks, chips, or contamination before mounting, as surface defects directly affect runout and tool life.