Jacobs 7327N Drill Chuck Arbor JT3 Mount 5MT Shank

Product Description

The JACOBS 7327N is a taper drill chuck arbor designed to connect a Jacobs Taper 3 (JT3) drill chuck to a machine spindle with a No. 5 Morse Taper (5MT) shank. The arbor serves as the mechanical interface between the chuck and the spindle, transmitting rotational force and maintaining concentric alignment during drilling operations. Weighing 3.3125 pounds, it is built for use in drill presses, lathes, milling machines, and other machine tools equipped with a 5MT spindle bore. Machinists, tool and die technicians, and maintenance mechanics are the primary installers of this type of arbor.

This arbor is suited for industrial and shop environments where a JT3 chuck must be mounted to a machine with a No. 5 Morse Taper spindle. Typical applications include floor-standing drill presses, metalworking lathes, and heavy-duty machine tool setups that require a secure, repeatable chuck-to-spindle connection. It is appropriate for both production and maintenance contexts where chuck interchange or replacement is part of routine machine servicing.

Key Features

• JT3 (Jacobs Taper 3) mount accepts standard JT3 drill chucks
• No. 5 Morse Taper shank fits machines with a 5MT spindle bore
• Tapered shank design provides self-holding friction fit in the spindle
• Enables direct chuck-to-spindle mounting without additional adapters
• Weighs 3.3125 pounds, indicating a robust, heavy-duty construction

Compatibility

Designed as an OEM-style arbor for use with JT3 drill chucks on machine tools equipped with a No. 5 Morse Taper spindle socket.

Installation Notes

Installation is performed by machinists or qualified machine tool technicians. Before installing or removing the arbor, power down the machine and confirm the spindle has come to a complete stop. The 5MT shank is driven into the spindle bore using a soft mallet or arbor press to seat the taper; removal typically requires a drift key inserted through the spindle drift slot. Ensure the taper surfaces are clean and free of burrs or oil before seating to maintain concentricity and prevent fretting.