Accupro ECIL344000MSC Taper Drill Chuck Arbor JT4 3/4 in

Product Description

The ACCUPRO ECIL344000MSC is a taper drill chuck arbor designed to connect a Jacobs Taper 4 (JT4) drill chuck to a machine spindle with a straight shank. The arbor transmits rotational force from the spindle to the chuck, providing a secure, concentric mounting interface for drilling operations. The straight shank measures 3/4 inch in diameter, and the mount end accepts a JT4 taper chuck. This arbor is installed by machinists, tool-and-die technicians, and shop maintenance personnel on drill presses, milling machines, and similar rotating equipment.

This arbor is suited for use in machine shop environments where a JT4 chuck must be mounted to a straight-shank spindle or toolholder. Typical applications include production drilling on bench-top and floor drill presses as well as light-duty milling setups requiring a drill chuck attachment. The 3/4 inch straight shank fits a range of collet chucks and toolholders sized for that bore diameter. One arbor is included per package.

Key Features

• JT4 (Jacobs Taper 4) mount taper accepts standard JT4 drill chucks
• 3/4 inch straight shank diameter for compatibility with common toolholders and spindles
• Straight shank design allows secure clamping in collet chucks or set-screw toolholders
• Compact, single-piece arbor construction for rigid chuck mounting
• Weighs 0.88 pounds, suitable for standard drill press and milling machine use

Compatibility

Designed as a direct-fit arbor for drill chucks with a JT4 (Jacobs Taper 4) chuck mount, used with machines or toolholders accepting a 3/4 inch straight shank. No specific OEM model compatibility data was provided in the product input.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians. Power down and lock out the machine spindle before seating or removing the arbor. The JT4 taper end should be pressed or tapped firmly into the chuck bore to ensure full taper engagement before use. Inspect the taper surfaces for burrs or contamination prior to assembly, as debris can cause runout and reduce chuck concentricity.