Accupro 685.62844178 Drill Chuck Key CK3 5/32 in

Product Description

The ACCUPRO 685.62844178 is a CK3 drill chuck key designed to tighten and release drill chucks on compatible drilling equipment. It features a 5/32 inch (0.1575 inch decimal) pilot diameter and is sized for use with 1/4 inch capacity chucks. This type of key is a standard accessory in machine shops, fabrication environments, and general trade work wherever a keyed drill chuck requires frequent bit changes. It weighs 0.13 pounds and is sold individually. Machinists, tool-and-die workers, and general tradespeople keep these on hand as direct replacements or backups for lost or worn chuck keys.

This chuck key is intended for use with 1/4 inch capacity keyed drill chucks that accept a CK3 key. Typical applications include benchtop drill presses, portable electric drills with keyed chucks, and light-duty machining setups. It suits both shop and field use where a compact, low-capacity chuck key is needed for routine bit changes or chuck maintenance. The key number CK3 and pilot diameter of 5/32 inch are the primary fitment identifiers when cross-referencing compatible chucks.

Key Features

• CK3 key number for straightforward cross-reference with compatible chuck models
• 5/32 inch pilot diameter (0.1575 inch decimal) for precise engagement with the chuck pilot hole
• Sized for 1/4 inch capacity keyed drill chucks
• Lightweight at 0.13 pounds — easy to store and handle on the bench or in the field
• Sold as a single unit, suitable for individual replacement needs

Compatibility

Designed for use with 1/4 inch capacity keyed drill chucks that require a CK3 key. Product number compatibility reference: 6H. Verify pilot diameter and key number against your chuck specifications before ordering.

Installation Notes

Always ensure the drill or drill press is powered off and unplugged before changing bits or servicing the chuck. Insert the pilot pin of the chuck key fully into the chuck pilot hole before applying torque to avoid slippage or damage to the chuck teeth. Do not use a chuck key as a pry tool or apply force beyond normal hand tightening. Replace any chuck key that shows signs of wear, rounding, or cracking to maintain secure chuck engagement.