Accupro 772136 End Mill Holder CAT50 1/2 Inch Through Coolant

Product Description

The ACCUPRO 772136 is a CAT50 taper shank end mill holder designed for CNC machining centers that require precise tool holding with through-coolant capability. The holder accepts a 1/2 inch bore and delivers a 2.63 inch projection with a 1-3/8 inch nose diameter, making it well-suited for operations where reach and rigidity must be balanced. With a total indicator runout (TIR) of 0.0002 inches and a clamping depth of 1.5 inches, this holder supports tight-tolerance milling work. It is balanced to 25,000 RPM, accommodating high-speed spindle applications. The retention knob thread size is 1-8. Machinists and CNC setup technicians are the primary installers of this toolholder.

This end mill holder is used in production and job-shop environments with CAT50-spindle vertical and horizontal machining centers. It is appropriate for both roughing and finishing operations where through-spindle or DIN flange coolant delivery is available. The 1/2 inch bore accommodates standard shank end mills commonly used in ferrous and non-ferrous material removal. The 6.63 inch overall length and 2.63 inch projection suit applications requiring moderate tool extension beyond the spindle face.

Key Features

• CAT50 taper shank for compatibility with CAT50-spindle machining centers
• 1/2 inch bore diameter with 1.5 inch clamping depth for secure tool engagement
• Through-coolant support via through-spindle and DIN flange coolant types
• TIR of 0.0002 inches for high-precision tool holding
• Balanced to 25,000 RPM for high-speed machining applications
• Retention knob thread size of 1-8 for standard CAT50 drawbar systems

Compatibility

Designed as an OEM-style replacement and standard fitment for CAT50-spindle CNC machining centers equipped with through-spindle or DIN flange coolant systems.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing toolholders. Clean the taper bore and spindle taper thoroughly before seating the holder to prevent runout caused by contamination. Verify retention knob torque and drawbar engagement per the machine tool manufacturer specifications before operating the spindle.