Accupro 775264 End Mill Holder BT50 3/4 Inch Through Coolant

Product Description

The ACCUPRO 775264 is a BT50 taper shank end mill holder designed for CNC machining centers requiring high-precision tool clamping with through-coolant capability. It accepts a 3/4 inch bore and delivers a 3 inch projection from the spindle face, with a 1-3/4 inch nose diameter. The holder is balanced to 25000 RPM, making it suitable for high-speed milling operations. Total indicator runout (TIR) is rated at 0.0002 inch, ensuring tight concentricity tolerances critical for finish milling and precision contouring. Installation and setup are performed by CNC machinists and toolroom technicians working in production or job-shop environments.

This end mill holder is used in CNC vertical and horizontal machining centers equipped with a BT50 spindle interface. The 3 inch projection suits applications requiring clearance for deep-pocket milling or part features that restrict spindle proximity. Through-coolant delivery is compatible with both through-spindle and DIN flange coolant systems, supporting high-pressure coolant applications for chip evacuation and tool life in ferrous and non-ferrous machining. It is appropriate for production environments running high spindle speeds where balance and runout are closely controlled.

Key Features

• BT50 taper shank for direct mount in BT50-spindle machining centers
• 3/4 inch bore accommodates standard end mill shank diameter
• 3 inch projection provides clearance for deep-feature and obstructed-workpiece setups
• Through-coolant compatible with through-spindle and DIN flange coolant delivery systems
• Balanced to 25000 RPM for high-speed milling stability
• TIR of 0.0002 inch for precise tool concentricity and consistent cut quality

Compatibility

Designed for CNC machining centers with a BT50 spindle taper interface and through-coolant capability via through-spindle or DIN flange coolant systems.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom personnel. Power down and lock out the machining center spindle before mounting or removing the holder. Use a calibrated torque wrench and the appropriate BT50 pull stud and retention knob for the target machine spindle. Verify runout with a dial test indicator after seating to confirm concentricity before running at elevated spindle speeds.