Accupro 685.62844238 Drill Chuck Key CK5 5/16 in Pilot

Product Description

The ACCUPRO 685.62844238 is a CK5 drill chuck key designed for use with 1/2 inch capacity chucks. It features a 5/16 inch pilot diameter (0.3150 inches decimal) that seats securely into the chuck body to provide the leverage needed to tighten or loosen drill bits and other rotary tooling. This key is a standard hand tool used in machine shops, fabrication facilities, and maintenance environments wherever a keyed drill chuck is in service. Machinists, maintenance technicians, and tool crib staff are the primary users. It is a direct-use accessory requiring no power connection or modification.

This chuck key is suited for benchtop drill presses, floor-standing drill presses, and other equipment fitted with a keyed 1/2 inch drill chuck. It is identified by key number CK5 and is listed as compatible with product numbers 13XH and 16H per manufacturer specifications. The compact size and low weight make it easy to store at the machine or on a tool board near the work station.

Key Features

• CK5 key number for precise chuck engagement
• 5/16 inch pilot diameter (0.3150 inches decimal) fits 1/2 inch capacity chuck bores
• Compatible with product numbers 13XH and 16H
• Lightweight at 0.13 pounds for easy handling and storage
• Sold individually — one key per package

Compatibility

Designed for use with 1/2 inch capacity keyed drill chucks. Compatible with product numbers 13XH and 16H per manufacturer data.

Installation Notes

Insert the pilot pin fully into the chuck pilot hole before applying torque to ensure the gear teeth engage properly and the key does not slip. Ensure the drill press or machine is powered off and unplugged before changing bits or operating the chuck key. Store the key away from the chuck when the machine is in use — never leave a chuck key inserted in a rotating or powered spindle.