Jacobs 7325DN Drill Chuck Arbor JT33 Mount 4MT Shank

Product Description

The JACOBS 7325DN is a drill chuck arbor designed to connect a Jacobs Taper 33 (JT33) mount chuck to a machine spindle with a No. 4 Morse Taper (4MT) shank. The arbor serves as the mechanical interface between the drill chuck and the spindle, transmitting rotational force and maintaining accurate chuck alignment during drilling operations. Weighing 1.375 pounds, it is a solid, direct-fit component used by machinists and toolroom technicians working on drill presses, lathes, and milling machines equipped with a 4MT spindle bore.

This arbor is suited for industrial and shop environments where a JT33 chuck must be mounted to a 4MT spindle. Common applications include drill press setups, tailstock chuck installations on metalworking lathes, and similar machine tool configurations requiring a reliable taper-to-taper connection. It is a standard component in toolroom maintenance and machine setup work.

Key Features

• JT33 (Jacobs Taper No. 33) mount end accepts compatible JT33 drill chucks
• No. 4 Morse Taper (4MT) shank fits machine spindles with a 4MT bore
• Taper-to-taper design provides secure, self-holding chuck and spindle connection
• Compact, single-piece arbor construction for rigid chuck-to-spindle alignment
• UNSPSC Code 27112800 for streamlined procurement classification

Compatibility

Designed as a direct-fit arbor for drill chucks with a JT33 mount, used in machine spindles or tailstocks with a No. 4 Morse Taper (4MT) bore. Specific machine model compatibility was not stated in the product data; verify spindle taper size and chuck taper specification before ordering.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine before seating or removing the arbor. Clean both the spindle bore and the arbor shank thoroughly before insertion to ensure full taper contact and prevent fretting. Use a drift and mallet only through the spindle drift slot to remove the arbor - never apply side force to the chuck body during removal.