Sandvik Coromant 5721252 Boring Bar Holder CAT50

Product Description

The SANDVIK COROMANT 5721252 is a boring bar holder designed for precision machining applications requiring a stable, rigid tool connection. Built for CAT50 spindle interfaces, this holder accepts boring bars with a 1-1/2 inch bore diameter and provides 101.6 mm of bore depth, giving machinists the reach needed for deeper internal turning operations. The 3-3/4 inch body diameter adds mass and rigidity to minimize vibration during cuts. An integrated internal coolant design channels fluid directly to the cutting zone, supporting extended tool life and effective chip evacuation in production environments. Installation and tool changes are handled by qualified CNC machinists and toolroom personnel.

This boring bar holder is suited for heavy-duty machining centers using CAT50 tooling systems. It is appropriate for both roughing and finishing passes in ferrous and non-ferrous materials where bore depth and concentricity are critical. The internal coolant path makes it a practical choice for shops running high-pressure coolant systems on vertical or horizontal machining centers. Lock screw compatibility includes part numbers 3021 011-380, and coolant screw compatibility references part number 3214 010-355. The manufacturer also references this holder under part number AA3B05-50 38 101.

Key Features

• CAT50 spindle connection for compatibility with heavy-duty machining centers
• 1-1/2 inch bore diameter with 101.6 mm bore depth for deep boring operations
• 3-3/4 inch body diameter for increased rigidity and vibration damping
• Internal coolant design directs fluid to the cutting zone for chip control and tool longevity
• Lock screw interface accepts compatible screws (3021 011-380) for secure bar retention
• Coolant screw compatible with part number 3214 010-355

Compatibility

Compatible lock screws: 3021 011-380. Compatible coolant screw: 3214 010-355. Also referenced by manufacturer part number AA3B05-50 38 101. Designed for use with CAT50 spindle tooling systems on compatible machining centers.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with CAT50 tooling systems. Ensure the machine spindle is fully powered down and locked out before mounting or removing the holder. Use the specified lock screws and a calibrated torque wrench when securing boring bars to avoid damage to the bore or set screw threads. Verify coolant port alignment with the machine spindle coolant passage before operation.