Accupro 775144 CAT50 End Mill Holder 1 in Hole Through Coolant

Product Description

The ACCUPRO 775144 is a CAT50 taper shank end mill holder designed for CNC machining centers that require rigid tool holding with integrated coolant delivery. This holder features a 1-inch bore diameter and a 6-inch projection, placing the cutting tool at a consistent standout from the spindle face. The nose diameter measures 2-23/64 inches. Through-spindle and DIN flange coolant capability is built in, allowing coolant to flow directly to the cutting edge. The drawbar thread size is 1-8. Licensed machinists and CNC setup technicians install this holder on CAT50-compatible machining centers for milling operations requiring precise tool runout and high-speed performance.

This end mill holder is suited for use on vertical and horizontal machining centers equipped with a CAT50 spindle interface. The 6-inch projection makes it appropriate for applications where extended reach is needed to clear fixtures or machine into deep pockets. The through-coolant design supports high-speed cutting of ferrous and non-ferrous materials where directed coolant flow reduces heat buildup at the tool tip. It is balanced to 25,000 RPM, making it compatible with high-speed spindle applications in production environments.

Key Features

• CAT50 taper shank for use on standard CAT50 machining center spindles
• 1-inch bore diameter accommodates common end mill shank sizes
• 6-inch projection for extended reach into deep features or past tall fixtures
• Through-spindle and DIN flange coolant delivery directs coolant to the cutting zone
• TIR of 0.0002 inches supports accurate, repeatable tool positioning
• Balanced to 25,000 RPM for high-speed spindle compatibility
• 1-8 drawbar thread size matches standard CAT50 tooling retention systems

Compatibility

Designed for use with CAT50 taper spindle machining centers. Compatible with through-spindle coolant systems and DIN flange coolant configurations. Accepts end mills and cutting tools with a 1-inch straight shank.

Installation Notes

Installation should be performed by a qualified CNC machinist or tooling technician. Power down and lock out the machining center before changing tooling. Use the correct drawbar torque procedure specified by the machine manufacturer for CAT50 retention. Verify tool runout with a dial indicator after seating to confirm TIR is within acceptable limits before beginning a cut.