Accupro 772118 End Mill Holder CAT50 3/8 Inch Through Coolant

Product Description

The ACCUPRO 772118 is a CAT50 taper shank end mill holder designed for use in CNC machining centers requiring high-precision tool holding. It accepts a 3/8 inch bore and delivers a 2.5 inch projection from the spindle face, with a 1 inch nose diameter and a clamping depth of 1.26 inches. The holder is engineered for through-coolant delivery, supporting both through-spindle and DIN flange coolant configurations. With a total indicator runout (TIR) of 0.0002 inch and a balance rating of 25,000 RPM, this holder is suited for high-speed finishing and semi-finishing operations. It is installed by CNC machinists and toolroom technicians.

This end mill holder is intended for use in CAT50 spindle-equipped CNC vertical and horizontal machining centers. The through-coolant feature makes it well-suited for deep-pocket milling, long-reach applications, and materials that require directed coolant at the cutting edge. The retention knob thread size is 1-8, standard for CAT50 tooling systems. At 6.5 inches overall length, it accommodates setups where projection and rigidity must be balanced. This holder is commonly found in production shops, toolrooms, and job shops running CAT50 spindle equipment.

Key Features

• CAT50 taper shank for direct spindle mounting on CAT50-equipped machining centers
• 3/8 inch bore diameter with 1.26 inch clamping depth for secure tool engagement
• Through-coolant compatible via through-spindle and DIN flange coolant ports
• TIR of 0.0002 inch for high-precision runout control
• Balanced to 25,000 RPM for high-speed machining applications
• Retention knob thread size 1-8, standard CAT50 specification

Compatibility

Designed as an OEM-style replacement and standard fitment for CAT50 spindle machining centers requiring a 3/8 inch bore end mill holder with through-coolant capability.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Always power down and lock out the machining center spindle before inserting or removing tool holders. Confirm the retention knob is properly torqued to the spindle manufacturer specification before operation. Inspect the taper shank and spindle bore for chips or contamination prior to assembly to maintain runout integrity.