Jacobs 0 Drill Chuck Key 1/8 Inch Pilot

Product Description

The JACOBS #0 is a drill chuck key designed to tighten and release drill chucks on corded and cordless drilling equipment. The key features a 1/8 inch pilot diameter, which must match the pilot hole on the chuck body for proper engagement. At 0.5 pounds, it is a compact, lightweight hand tool suited for bench-top drill presses and handheld drills alike. Machinists, maintenance technicians, and general trade professionals keep this key on hand as a direct-fit accessory for compatible JACOBS chucks. It is sold individually as a single-piece replacement or spare.

The #0 chuck key is appropriate for light-duty drilling applications where a K0 key designation is specified. It suits residential and commercial maintenance environments, machine shops, and fabrication settings. The K0 key number and 1/8 inch pilot diameter are the critical fitment dimensions when selecting a replacement key for an existing chuck assembly. Verify both the key number and pilot diameter against the chuck body before ordering.

Key Features

• K0 key number designation for correct chuck fitment
• 1/8 inch pilot diameter for precise engagement with compatible chuck pilot holes
• Lightweight at 0.5 pounds for easy one-handed use
• Single-piece unit sold individually
• Compact form factor suitable for drill presses and handheld drill chucks

Compatibility

Compatible with JACOBS chuck models designated for K0 key number and 1/8 inch pilot diameter. Product Number Compatibility noted in supplier data references designations O and OB. Confirm key number and pilot diameter match the chuck specification before installation.

Installation Notes

Disconnect or power down the drilling equipment before inserting or removing a chuck key. Insert the pilot pin fully into the chuck pilot hole and engage the gear teeth squarely before applying torque. A licensed or qualified maintenance technician should service industrial drill press chucks in accordance with applicable workplace safety standards. Do not use a chuck key as a pry tool or hammer substitute.