Accupro 772058 CAT40 End Mill Holder 5/8 Inch Bore

Product Description

The ACCUPRO 772058 is a CAT40 taper shank end mill holder designed for CNC machining centers requiring precise tool retention and coolant delivery. The holder features a 5/8 inch bore diameter, a 3 inch projection, and a 1-21/32 inch nose diameter. Through-spindle and DIN flange coolant capability supports high-speed cutting operations with active chip and heat management. A total indicator runout (TIR) of 0.0002 inch ensures accurate tool positioning, and the holder is balanced to 30,000 RPM, making it suitable for high-speed machining applications. Machinists and CNC operators install this holder on CAT40-spindle machines.

This end mill holder is intended for use on CNC vertical and horizontal machining centers equipped with CAT40 spindle tapers. The 3 inch projection suits a range of end mill lengths and milling operations in production and job-shop environments. The through-coolant design delivers fluid directly to the cutting zone, supporting longer tool life and improved surface finishes in demanding materials. The 5/8-11 retention knob thread size is standard for CAT40 tooling systems.

Key Features

• CAT40 taper shank for direct mounting on CAT40-spindle machining centers
• 5/8 inch bore diameter with 1.61 inch clamping depth for secure end mill retention
• Through-spindle and DIN flange coolant delivery for active cutting-zone cooling
• TIR of 0.0002 inch for precise tool concentricity
• Balanced to 30,000 RPM for high-speed machining compatibility
• 5/8-11 retention knob thread size, standard CAT40 configuration

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers with CAT40 spindle tapers accepting 5/8 inch bore end mill holders.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician familiar with CAT40 tooling systems. Power down and lock out the machining center spindle before installing or removing any tool holder. Use the appropriate torque wrench and face spanner or mill holder wrench when seating the retention knob; follow the machine tool builder specifications for retention knob torque. Inspect the taper shank and spindle bore for contamination or damage before installation to ensure proper seating and runout performance.