Jacobs 7318N Taper Drill Chuck Arbor JT6 3MT

Product Description

The JACOBS 7318N is a taper drill chuck arbor designed to connect a Jacobs Taper 6 (JT6) drill chuck to a No. 3 Morse Taper (3MT) spindle or quill. This type of arbor serves as the mechanical interface between the chuck body and the machine spindle, transmitting rotational force and maintaining accurate chuck alignment during drilling operations. Machined to standard taper dimensions, it provides a secure, self-holding fit on both ends. The 7318N is installed by machinists, tool-and-die setups, and maintenance technicians working on drill presses, milling machines, and similar machine tools that accept a 3MT spindle bore.

This arbor is suited for industrial and job-shop environments where a JT6 chuck must be mounted to a machine with a 3MT spindle. Typical applications include bench and floor-model drill presses and mill-drill units configured with a No. 3 Morse Taper quill. It is also used in maintenance and repair operations where a chuck is being refitted to an existing machine spindle. No specific compatible model numbers were provided in the product data.

Key Features

• JT6 (Jacobs Taper No. 6) mount end for direct chuck attachment
• 3MT (No. 3 Morse Taper) shank for self-holding fit in standard spindle bores
• Self-locking Morse Taper geometry holds under drilling torque without fasteners
• Compact arbor design minimizes spindle-to-chuck distance
• Unit weight of 0.6875 pounds indicates a solid, all-metal construction typical of production-grade arbors

Compatibility

Designed as a direct-fit arbor for drill chucks with a JT6 (Jacobs Taper No. 6) mount seat, installed into machine spindles or quills bored to a No. 3 Morse Taper. No specific machine model compatibility data was provided in the product information.

Installation Notes

Installation is performed by machinists or maintenance technicians. The machine must be fully de-energized and the spindle brought to a complete stop before arbor installation or removal. The Morse Taper shank and spindle bore should be clean and free of oil, chips, and burrs before seating the arbor; a properly seated Morse Taper should be driven in with a soft mallet and will resist casual removal. To remove, use the machine's built-in arbor drift slot and a drift key rather than prying, which can damage the taper surfaces.