Jacobs 30825 Drill Chuck Key K30 15/64 Inch Pilot

Product Description

The JACOBS 30825 is a K30 drill chuck key designed as a direct replacement for use with compatible JACOBS chuck series. The key features a 15/64 inch pilot diameter, which indexes precisely into the chuck body to engage the bevel gear teeth and allow secure tightening or loosening of the chuck jaws. It weighs 0.13 pounds, making it a compact, easy-to-handle service item. Machinists, maintenance technicians, and industrial tradespeople install this key as a replacement when an original key is lost or damaged. It is a stock item typically kept on hand wherever JACOBS chucks are in regular use.

This drill chuck key is compatible with JACOBS 31 Series, 41 Series, and 8-1/2N Series chucks. It is suited for use in production shops, maintenance facilities, and any setting where JACOBS keyed chucks are mounted on drill presses, lathes, or bench drilling equipment. The K30 designation identifies the key geometry, ensuring proper fit and engagement with the matching chuck series. Using the correct key number prevents slippage and premature wear on the chuck gear teeth.

Key Features

• K30 key number for precise fit with designated JACOBS chuck series
• 15/64 inch pilot diameter for accurate engagement with the chuck body port
• Lightweight at 0.13 pounds for easy handling and storage
• Direct OEM-style replacement minimizes downtime when a key is lost or worn
• Sold individually for single-unit replacement needs

Compatibility

Compatible with JACOBS 31 Series, 41 Series, and 8-1/2N Series drill chucks, as specified by the manufacturer. Always verify the key number stamped on the existing chuck or chuck documentation before ordering.

Installation Notes

Installation and removal of a drill chuck key is performed by a machinist or qualified maintenance technician. Before servicing any chuck, power down the drill press or machine and confirm the spindle has come to a complete stop. Insert the pilot pin fully into the chuck body port to ensure full gear tooth engagement before applying torque. Do not use a chuck key as a lever or strike it with a hammer, as this can damage the bevel gear teeth on the chuck body.