Accupro EJ33300000MSC Taper Drill Chuck Arbor JT33 3MT

Product Description

The ACCUPRO EJ33300000MSC is a taper drill chuck arbor designed to connect a Jacobs Taper 33 (JT33) drill chuck to a No. 3 Morse Taper (3MT) spindle. This arbor serves as the mechanical interface between the drill chuck and the machine spindle, transmitting torque and maintaining concentricity during drilling operations. It is used in drill presses, milling machines, and lathes equipped with a 3MT spindle bore. Machinists and tool and die technicians install this arbor when mounting or swapping drill chucks on compatible machine tools. The part weighs 0.73 pounds and ships as a single unit.

This chuck arbor is suited for machine shop environments where a JT33-mount chuck must be installed on a 3MT spindle. Typical applications include production drilling on floor-model drill presses and knee mills with a No. 3 Morse Taper spindle. The arbor seats by direct taper interference fit, requiring no additional fasteners for retention during normal drilling use. It is appropriate for both job-shop and maintenance machining setups.

Key Features

• JT33 (Jacobs Taper 33) mount accepts standard JT33 drill chucks
• No. 3 Morse Taper (3MT) shank fits 3MT spindle bores on drill presses, mills, and lathes
• Taper-on-taper interference fit provides rigid, self-holding connection without fasteners
• Compact, single-piece construction at 0.73 pounds for easy handling and storage
• Sold individually — one arbor per package

Compatibility

Designed as an OEM-style replacement or new-installation arbor for machine tool spindles with a No. 3 Morse Taper (3MT) bore accepting JT33-mount drill chucks.

Installation Notes

Installation is performed by machinists or qualified machine tool technicians. Before installing or removing the arbor, power down and lock out the machine spindle per OSHA lockout/tagout procedures. Clean both the 3MT spindle bore and the arbor shank with a lint-free cloth to remove oil, chips, and debris before seating — contamination reduces concentricity and holding force. To remove the arbor, use a proper Morse Taper drift through the spindle drift slot; never pry or strike the chuck directly, as this can damage the chuck body or spindle bore.