Accupro ER8J600000MSC Taper Drill Chuck Arbor JT6 R8

Product Description

The ACCUPRO ER8J600000MSC is a taper drill chuck arbor designed to connect a Jacobs Taper 6 (JT6) drill chuck to an R8 shank spindle. It serves as the mechanical interface between the chuck and the machine spindle, transferring rotational force while maintaining concentricity during drilling operations. Weighing 0.97 pounds, this arbor is a compact, solid-shank adapter suited for use in milling machines and drill presses equipped with an R8 spindle taper. Machinists and toolroom technicians install this type of arbor when mounting a JT6 drill chuck to an R8-compatible machine.

This chuck arbor is used in machine shop and toolroom environments where an R8 spindle interface is standard, such as Bridgeport-style vertical milling machines and compatible bench or floor drill presses. It is appropriate for both production and job-shop applications where a dedicated drill chuck setup is required. The JT6 mount accepts large-capacity drill chucks commonly used for drilling with larger-diameter twist drills or step drills in ferrous and non-ferrous materials.

Key Features

• JT6 Jacobs Taper mount accepts large-capacity drill chucks
• R8 shank taper for direct installation into R8-spindle machines
• Tapered shank and mount design ensures secure, self-locking fit under load
• Lightweight at 0.97 pounds, minimizing added spindle load
• Sold as a single-piece unit, package quantity of 1

Compatibility

Designed as an OEM-style replacement and standard-fit arbor for milling machines and drill presses with an R8 spindle taper accepting JT6 drill chucks.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before seating or removing the arbor. The R8 shank seats into the spindle taper and is typically secured with a drawbar — do not operate the machine without the drawbar properly tightened. When mounting the chuck onto the JT6 taper, seat it firmly with a mallet strike to ensure full taper engagement before use.