Accupro EJ43300000MSC Taper Drill Chuck Arbor JT33 4MT

Product Description

The ACCUPRO EJ43300000MSC is a taper drill chuck arbor designed to connect a Jacobs Taper 33 (JT33) drill chuck to a No. 4 Morse Taper (4MT) spindle. The arbor serves as a precision interface between the chuck and the machine spindle, transmitting rotational force while maintaining accurate chuck alignment. Weighing 1.41 pounds, this solid arbor is built for repeated use in production and maintenance environments. Machinists and tool crib personnel working with drill presses, lathes, and milling machines use this type of arbor to mount chucks securely without adapter stacking.

This arbor is suited for machine tools equipped with a No. 4 Morse Taper spindle bore that require a JT33 chuck interface. Typical applications include floor-model and bench drill presses, lathe tailstocks, and milling machine quills where a 4MT spindle is present. The JT33 mount accepts standard Jacobs Taper 33 chucks, which are common in mid-to-large capacity drill chuck assemblies used in industrial and job-shop settings.

Key Features

• JT33 Jacobs Taper mount accepts standard JT33 drill chucks
• No. 4 Morse Taper shank seats directly into 4MT spindle bores
• Taper-to-taper design eliminates threaded adapters and reduces runout risk
• Weighs 1.41 pounds, indicating a solid, full-size arbor construction
• Single-piece arbor format provides a direct, rigid chuck-to-spindle connection

Compatibility

Designed for use with machine tool spindles having a No. 4 Morse Taper (4MT) bore and drill chucks with a Jacobs Taper 33 (JT33) mounting taper.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down and lock out the machine before seating or removing the arbor. Clean both the spindle bore and the arbor shank of chips, oil, and burrs before seating to ensure full taper contact. Use a drift and mallet in the spindle drift slot to remove the arbor — do not pry or strike the chuck body directly.