Value Collection 222-773 Taper Drill Chuck Arbor JT3 R8

Product Description

The VALUE COLLECTION 222-773 is a taper drill chuck arbor designed to connect a Jacobs Taper 3 (JT3) drill chuck to an R8 shank spindle. This arbor serves as the mechanical interface between the chuck and the machine spindle, transmitting torque and maintaining accurate chuck alignment during drilling operations. It is a standard tooling component used in milling machines and drill presses equipped with an R8 spindle taper. Machinists and tool-room technicians install this arbor when mounting or replacing a JT3-mount drill chuck on compatible machinery.

This chuck arbor is suited for use in manual milling machines and bench-top or floor-standing drill presses that accept an R8 spindle taper. It is appropriate for machine shops, maintenance facilities, and production environments where a JT3 drill chuck must be reliably secured to an R8 spindle. The arbor accommodates standard JT3-mount chucks and is installed without special tooling beyond a drawbar wrench and a soft mallet for seating the taper.

Key Features

• JT3 Jacobs Taper mount accepts standard JT3 drill chucks
• R8 shank taper mates directly with R8 spindle machines
• Tapered shank and mount provide self-centering alignment for accurate drilling
• Compact, single-piece arbor construction for rigid chuck-to-spindle connection
• Weighs 1.12 pounds for easy handling during chuck changes

Compatibility

Designed as a direct-fit arbor for R8 spindle milling machines and drill presses accepting a JT3-mount drill chuck.

Installation Notes

Installation is typically performed by a machinist or qualified toolroom technician. Power down and lock out the machine before installing or removing any spindle tooling. Seat the R8 shank fully into the spindle and secure with the machine drawbar before operation. Do not use the chuck or arbor until the drawbar is properly torqued and all tooling is confirmed tight.