Jacobs 7312N Drill Chuck Arbor JT33 2MT Morse Taper

Product Description

The JACOBS 7312N is a taper drill chuck arbor designed to connect a Jacobs Taper 33 (JT33) drill chuck to a machine spindle with a No. 2 Morse Taper (2MT) shank. The arbor serves as the mechanical interface between the chuck body and the machine, transmitting torque and maintaining concentricity during drilling operations. It is a precision-fit component used in drill presses, milling machines, and lathes equipped with a 2MT spindle bore. Installation requires no special tooling beyond a standard drift and mallet for seating and removal. Machinists, tool and die technicians, and maintenance mechanics are the typical end users.

This arbor is suited for both light-duty and general-purpose drilling applications in shop and production environments. The JT33 mount accepts standard JT33-tang chucks commonly found on benchtop and floor-standing drill presses. The 2MT shank seats directly into any spindle or tailstock bored to the No. 2 Morse Taper standard, making it a common replacement or spare in facilities running multiple machines with that spindle size.

Key Features

• JT33 mount taper interfaces with standard Jacobs Taper 33 drill chucks
• No. 2 Morse Taper shank fits machines with a 2MT spindle bore
• Hardened taper surfaces provide positive self-locking seating under load
• Compact, lightweight design at 0.3125 pounds for easy handling and tool changes
• Compatible with drill presses, lathes, and milling machine tailstocks using 2MT spindles

Compatibility

Designed as a standard replacement arbor for drill press and machine tool setups using a JT33 chuck mount and a No. 2 Morse Taper spindle or tailstock bore.

Installation Notes

Installation is performed by machinists or qualified maintenance personnel. Clean both the spindle bore and the arbor shank thoroughly before seating to ensure full taper contact and prevent fretting. Drive the arbor firmly into the spindle using a soft-face mallet or arbor press; never use steel hammers directly on the taper. To remove, use the appropriate Morse Taper drift in the spindle drift slot and strike firmly to break the self-locking seat before lowering the chuck assembly.