Accupro 775430 Shell Mill Holder CAT40 1 Inch Pilot

Product Description

The ACCUPRO 775430 is a CAT40 taper shank shell mill holder designed for milling operations on machining centers equipped with CAT40 spindles. It features a 1 inch pilot diameter and a 4 inch projection from flange to nose end, providing solid reach for face milling and shell milling applications. Through-spindle and DIN flange coolant delivery is built in, directing coolant directly to the cutting zone. The holder carries a TIR of 0.0002 inches, supporting accurate, repeatable cuts. The lock screw thread is sized at 1/2-20. This holder is installed and serviced by CNC machinists and toolroom technicians.

The 775430 is suited for use on vertical and horizontal machining centers running CAT40 tooling. It accepts shell mills in the 2-1/4 to 2-3/4 inch cutting diameter range, covering common face mill and indexable shell mill bodies used in production and job shop environments. The through-coolant feature makes it a practical choice for high-speed cutting in steel, cast iron, and aluminum where chip evacuation and tool life are priorities. Typical applications include surfacing, shoulder milling, and step milling in both prototype and production runs.

Key Features

• CAT40 taper shank for direct mounting in CAT40 spindles
• 1 inch pilot diameter with 4 inch flange-to-nose projection
• Through-spindle and DIN flange coolant delivery for directed cutting-zone cooling
• TIR of 0.0002 inches for precise, repeatable tool runout
• 1/2-20 lock screw thread for secure shell mill retention
• Accepts shell mills from 2-1/4 to 2-3/4 inch cutting diameter

Compatibility

Designed as an OEM-style replacement and standard fit for machining centers with CAT40 spindle interfaces accepting shell mills in the 2-1/4 to 2-3/4 inch cutting diameter range.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Ensure the spindle is powered down and the machine is in a safe, locked-out state before mounting or removing toolholders. Clean the taper shank and spindle bore thoroughly before seating the holder to maintain TIR performance. Use the specified 1/2-20 lock screw when securing the shell mill body, and verify runout with a test indicator after mounting.