Accupro 772148 End Mill Holder CAT50 5/8 Inch Through Coolant

Product Description

The ACCUPRO 772148 is a CAT50 taper shank end mill holder designed for securing end mills in CNC machining centers. It accepts a 5/8 inch bore and delivers a 1.75 inch projection with a 1-21/32 inch nose diameter. Through-coolant capability routes coolant directly through the spindle and DIN flange, keeping the cutting zone clear during high-speed operations. A TIR of 0.0002 inch supports tight tolerancing and surface finish requirements. The retention knob thread size is 1-8, compatible with standard CAT50 drawbar systems. This holder is balanced to 25,000 RPM, making it suitable for high-speed machining applications. CNC machinists and toolroom technicians install this holder as part of standard tooling setups.

This end mill holder is used in vertical and horizontal CNC machining centers equipped with CAT50 spindle interfaces. Typical applications include production milling, profiling, and contouring operations where rigidity and coolant delivery are critical. The 1.61 inch clamping depth provides secure tool engagement for end mills with 5/8 inch shanks. It is commonly found in job shops, aerospace component manufacturing, and precision part production environments where high spindle speeds and coolant-through tooling are standard practice.

Key Features

• CAT50 taper shank for compatibility with standard CAT50 spindle interfaces
• 5/8 inch bore diameter with 1.61 inch clamping depth for secure tool retention
• Through-coolant design supporting both through-spindle and DIN flange coolant delivery
• Balanced to 25,000 RPM for high-speed machining operations
• TIR of 0.0002 inch for precision runout performance
• Retention knob thread size 1-8 for standard CAT50 drawbar compatibility

Compatibility

Designed as an OEM-style replacement and standard fitment end mill holder for CAT50 spindle machining centers accepting 5/8 inch shank end mills with through-coolant capability.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing toolholders. Use a torque wrench and appropriate end mill holder wrench to seat the retention knob and secure the cutting tool — do not over-tighten by hand. Verify TIR with a dial indicator after installation before resuming cutting operations.