Accupro ER8J330000MSC Taper Drill Chuck Arbor JT33 R8

Product Description

The ACCUPRO ER8J330000MSC is a taper drill chuck arbor designed to connect a Jacobs Taper 33 (JT33) drill chuck to an R8 taper shank spindle. This arbor serves as the mechanical interface between the chuck and the machine spindle, transmitting rotational force and maintaining concentricity during drilling operations. At 0.97 pounds, it is a compact, solid tooling component suited for use in milling machines and drill presses equipped with an R8 spindle. Installation and removal require standard drawbar and drift procedures typical of R8 tooling setups.

This chuck arbor is used in machine shop and industrial maintenance environments where an R8-spindle machine must accept a JT33-mount drill chuck. Common applications include knee mills, Bridgeport-style vertical milling machines, and benchtop drill presses with R8 spindles. It is installed by machinists, tool and die technicians, and maintenance mechanics performing tooling changeovers or chuck replacements on compatible machines.

Key Features

• JT33 Jacobs Taper mount accepts standard JT33 drill chucks
• R8 shank taper mates directly with R8 spindles without additional adapters
• Tapered mount and shank provide self-centering alignment for accurate chuck seating
• Compact and lightweight at 0.97 pounds for easy handling during tooling changes
• Sold individually as a single-piece unit

Compatibility

Designed as an OEM-style replacement or direct-fit arbor for R8-spindle machines accepting JT33-mount drill chucks. Specific machine model compatibility was not stated in the product data — verify spindle taper and chuck mount taper before installation.

Installation Notes

Installation is performed by a qualified machinist or maintenance technician. Before installing or removing the arbor, power down and lock out the machine spindle per applicable OSHA lockout/tagout procedures. Seat the R8 shank fully into the spindle and secure with the drawbar to the appropriate engagement before operating. To remove, use a proper drift or drawbar release method — never strike the chuck or arbor directly with a hammer.