Accupro 777656 CAT40 Milling Chuck 1 in Through Coolant

Product Description

The ACCUPRO 777656 is a CAT40 milling chuck designed for precision milling applications on CNC machining centers. It accepts a 1.0000 inch hole diameter and features a 2.4100 inch nose diameter with a 4.1400 inch projection, providing solid tool reach and rigidity in the spindle. The chuck supports through-spindle and DIN flange coolant delivery, directing cutting fluid directly to the cutting zone for improved chip evacuation and tool life. With a TIR of 0.0002 inch, this chuck holds tight runout tolerances critical to finish milling and interpolation work. Licensed machinists and CNC setup techs install this chuck as part of standard tooling setups on CAT40-taper spindle machines.

This milling chuck is suited for CNC vertical and horizontal machining centers equipped with CAT40 taper spindles. It is appropriate for high-speed milling, profiling, and finishing operations in both production and job-shop environments. The 3.1500 inch clamping depth and 6.8270 inch overall length make it a practical choice for setups requiring extended reach without sacrificing rigidity. Through-coolant capability makes it especially effective in applications involving deep pockets or difficult-to-machine materials where flood coolant alone is insufficient.

Key Features

• CAT40 taper shank for positive spindle engagement on compatible machining centers
• 1.0000 inch hole diameter with 3.1500 inch clamping depth for secure tool holding
• TIR of 0.0002 inch for tight runout tolerances in finish and precision milling
• Through-spindle and DIN flange coolant delivery directs fluid to the cutting zone
• 2.4100 inch nose diameter and 4.1400 inch projection for versatile reach
• 6.8270 inch overall length balances reach with setup rigidity

Compatibility

Designed as an OEM-style replacement and standard tooling chuck for CNC machining centers with CAT40 taper spindles.

Installation Notes

Installation should be performed by a qualified CNC machinist or tooling setup technician. Power down and lock out the machining center spindle before mounting or removing any toolholder. Use a torque wrench and the machine manufacturer's specified retention knob torque procedure when seating the chuck in the spindle. Inspect the taper shank and spindle bore for nicks, chips, or contamination before installation, as surface defects will directly affect runout and tool performance.