Jacobs 30602 Drill Chuck 1/2 in Keyed Threaded 1/2-20

Product Description

The JACOBS 30602 is a keyed drill chuck rated for up to 1/2 inch capacity with a threaded mount sized at 1/2-20. Built from steel with a plain bearing design, it is designed for use in stationary and portable drilling applications where secure bit retention and consistent concentricity matter. The sleeve diameter measures 1.61 inches, and the closed length is 2.855 inches. It accepts a KK key for tightening and loosening the jaws. This chuck is typically installed by machinists, maintenance technicians, and trade professionals working with drill presses, lathes, or hand drills requiring a threaded spindle interface.

The JACOBS 30602 suits residential and light industrial drilling tasks where a reliable threaded-mount chuck is needed on equipment with a 1/2-20 threaded spindle. It is appropriate for metal, wood, and general-purpose drilling applications. The keyed design provides a more positive grip on drill bits compared to keyless alternatives, making it well suited for higher-torque drilling situations. Maintenance technicians, tool-and-die shops, and general contractors working with compatible drilling equipment will find this chuck a straightforward replacement or upgrade option.

Key Features

• 1/2 inch maximum drill bit capacity accommodates a wide range of standard drill bits
• Threaded mount with 1/2-20 thread size for direct spindle installation
• Keyed design with KK key for positive jaw engagement under load
• Steel chuck body construction for durability in repetitive drilling use
• Closed length of 2.855 inches and open length of 2.25 inches for compact profile
• Sleeve diameter of 1.61 inches for standard grip clearance

Compatibility

Designed as an OEM-style replacement or direct-fit chuck for drilling equipment with a 1/2-20 threaded spindle interface.

Installation Notes

Installation is typically performed by a machinist or qualified maintenance technician. Before installing or removing the chuck, ensure the drill press or drilling tool is fully powered down and unplugged. Thread the chuck onto the spindle by hand first to avoid cross-threading, then tighten per the equipment manufacturer's torque guidance. Use the included KK key only on the chuck jaws, not as a lever for spindle installation.