Accupro 771236 Shell Mill Holder CAT50 1.5 Inch Pilot

Product Description

The ACCUPRO 771236 is a CAT50 shell mill holder with a dual contact taper shank, designed for use in CNC machining centers where rigidity and runout accuracy are critical. It features a 1.5-inch pilot diameter and a 10-inch overall length, with a 6-inch projection from flange to nose end. Through-spindle and DIN flange coolant delivery are both supported, making it suitable for demanding milling operations where chip evacuation and tool cooling are essential. A TIR of 0.0002 inches ensures precise tool positioning. Licensed machinists and CNC setup technicians install and maintain this toolholder in production and job-shop environments.

This shell mill holder is suited for horizontal and vertical machining centers using the CAT50 taper standard. It accepts shell mills in the 4-inch to 5-inch cutting diameter range, covering a broad set of face milling and shoulder milling applications. The dual contact taper shank engages both the taper and the spindle face for increased rigidity compared to standard single-contact CAT toolholders, making it a preferred choice in high-speed or heavy-duty milling setups. Balanced to 10,000 RPM, it is appropriate for modern high-speed spindle applications.

Key Features

• CAT50 dual contact taper shank for enhanced spindle rigidity and reduced vibration
• 1.5-inch pilot diameter accommodates shell mills in the 4-inch to 5-inch cutting diameter range
• Through-spindle and DIN flange coolant delivery for effective chip control and tool cooling
• TIR of 0.0002 inches for precise tool runout and repeatable positioning
• Balanced to 10,000 RPM for compatibility with high-speed machining centers
• Lock screw thread size of 3/4-16 for secure shell mill retention

Compatibility

Designed for use with CAT50 dual contact spindle configurations on CNC machining centers. Accepts shell mills with a 4-inch to 5-inch cutting diameter range and a 1.5-inch pilot bore.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machining center spindle before mounting or removing the toolholder. Use the appropriate CAT50 retention knob and torque to spindle manufacturer specifications. Verify TIR with a dial test indicator after installation before beginning any cutting operation.