Accupro 771194 Shell Mill Holder CAT40 0.75 Inch Pilot

Product Description

The ACCUPRO 771194 is a CAT40 shell mill holder with a dual contact taper shank, designed for secure, high-rigidity mounting of shell mills on CNC machining centers. It features a 0.75-inch pilot diameter and accepts shell mill cutting diameters in the 1.75- to 2-inch range. Through-spindle and DIN flange coolant delivery supports both flood and directed coolant strategies. Balanced to 10,000 RPM, this holder is suited for moderate- to high-speed face milling operations where runout control and spindle contact stability are critical. Machinists and CNC setup technicians are the primary installers of this toolholder.

This holder is intended for use on CAT40-spindle CNC milling machines and machining centers in job shop, production, and tool room environments. The dual contact taper shank engages both the taper and the spindle face simultaneously, reducing axle deflection under heavy radial loads typical in face milling and shoulder milling operations. The 4-inch flange-to-nose projection suits applications where moderate reach is needed without sacrificing rigidity. The lock screw thread size of 3/8-24 is standard for this class of shell mill holder.

Key Features

• CAT40 dual contact taper shank for simultaneous taper and face contact, improving rigidity over standard V-flange holders
• 0.75-inch pilot diameter accommodates shell mills in the 1.75- to 2-inch cutting diameter range
• Through-spindle and DIN flange coolant delivery for versatile coolant routing options
• Balanced to 10,000 RPM for stable high-speed operation
• TIR of 0.0002 inches ensures tight runout control for consistent surface finish and tool life
• 3/8-24 lock screw thread for secure shell mill retention

Compatibility

Designed for use with CAT40-spindle CNC machining centers accepting dual contact taper toolholders. Compatible with shell mills having a 0.75-inch pilot bore and cutting diameters from 1.75 to 2 inches.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before installing or removing the toolholder. Clean the spindle taper and holder taper thoroughly before seating to ensure full dual contact engagement. Torque the retention knob and lock screw according to the machine tool and toolholder manufacturer specifications using calibrated tooling.