Jacobs 14946 Drill Chuck 1/2 Inch Threaded 3/8-24 Keyed

Product Description

The JACOBS 14946 is a keyed drill chuck designed for threaded-mount applications requiring a reliable, industrial-grade grip on round-shank tooling. It accepts drill bits and accessories from 1/16 inch up to 1/2 inch in capacity, making it suitable for a wide range of boring and driving tasks. The chuck features a 3/8-24 threaded mount, plain bearing construction, and through-hardened steel jaws that deliver consistent clamping force across the full capacity range. Closed length measures 3 inches, and the sleeve diameter is 1-23/32 inches. This unit is tightened and released using a KK key, which is included or referenced in the part specification. Licensed tradespeople and maintenance technicians working with drill presses, hand drills, and similar rotating equipment will find this chuck a direct-fit replacement or upgrade.

The JACOBS 14946 is suited for industrial and commercial maintenance environments where tool holding integrity directly affects hole quality and operator safety. Its through-hardened jaw design makes it appropriate for repetitive use on metal, wood, and composite materials. Facilities maintenance crews, machine shop technicians, and trade professionals performing equipment repair or tooling upgrades are the primary installers of this chuck type.

Key Features

• Capacity range from 1/16 inch to 1/2 inch accommodates a broad selection of drill bits and round-shank accessories
• 3/8-24 threaded mount provides secure, standardized attachment to compatible spindles
• Through-hardened steel jaws deliver hard and durable gripping force under repeated use
• Keyed operation with KK key ensures positive tightening and controlled jaw engagement
• Plain bearing construction keeps the design straightforward and serviceable
• Industrial quality designation indicates suitability for continuous-duty applications

Compatibility

Designed as an OEM-style replacement or upgrade chuck for drill presses and portable drilling equipment fitted with a 3/8-24 threaded spindle mount.

Installation Notes

Installation should be performed by a qualified technician familiar with rotating tool equipment. Disconnect and lock out the power source before removing the existing chuck or installing this unit. Use the appropriate spindle wrench and arbor removal tools as required by the equipment manufacturer. Verify that the spindle threads are clean and undamaged before threading on the new chuck to ensure full engagement and concentricity.