Accupro 775150 End Mill Holder CAT50 1-1/4 in Hole

Product Description

The ACCUPRO 775150 is a CAT50 taper shank end mill holder designed for secure tool retention in CNC machining centers. It accepts a 1-1/4 inch bore and delivers a 4 inch projection from spindle face to tool tip. The holder supports through-spindle and DIN flange coolant delivery, allowing cutting fluid to reach the tool tip directly for improved chip evacuation and thermal control. A TIR of 0.0002 inch ensures tight runout tolerance, making it suitable for precision milling operations. Machinists and CNC service technicians install this holder in high-speed machining applications requiring reliable tool holding and balanced rotation.

This holder is suited for CAT50-spindle machining centers used in industrial manufacturing, job shops, and production environments. The 4 inch projection accommodates tooling setups where clearance is needed between the spindle nose and workpiece. With a balanced-to-RPM rating of 25,000 RPM, it supports high-speed spindle applications. The drawbar thread size of 1-8 is standard for CAT50 tooling systems. Through-coolant capability makes this holder appropriate for deep-reach milling, pocketing, and other operations where flood coolant alone is insufficient.

Key Features

• CAT50 taper shank for direct mounting in compatible machining center spindles
• 1-1/4 inch bore diameter for secure end mill retention
• 4 inch projection for extended reach tooling setups
• Through-spindle and DIN flange coolant delivery for direct tool-tip cooling
• TIR of 0.0002 inch for high-precision runout control
• Balanced to 25,000 RPM for high-speed machining compatibility

Compatibility

Designed as an OEM-style replacement or direct-fit holder for CAT50 spindle machining centers using a 1-8 drawbar thread and requiring through-coolant tool holding at 1-1/4 inch bore diameter.

Installation Notes

Installation is performed by qualified CNC machinists or tooling technicians. Always power down and lock out the machining center spindle before inserting or removing tool holders. Verify drawbar engagement to the 1-8 thread spec and confirm coolant passages are clear before resuming operation. Do not exceed the balanced RPM rating of 25,000 RPM during setup or cutting.