Jacobs JCM6283 Keyed Drill Chuck 1/2 in Threaded 3/8-24

Product Description

The JACOBS JCM6283 is a keyed drill chuck designed for use with threaded-mount drilling equipment. It accepts bit shanks from 5/64 inch (0.0781 inch) up to 1/2 inch (0.5000 inch), covering the full range of common twist drills and step bits used in trade and industrial applications. The chuck mounts via a 3/8-24 threaded interface and uses a K32 key for tightening and release. The sleeve diameter measures 1.79 inches, and the chuck body is constructed of steel for durability under repeated use. Licensed machinists, electricians, plumbers, and general tradespeople working with benchtop or handheld drilling equipment will find this a straightforward OEM-style replacement or upgrade chuck.

This chuck is suited for residential and light commercial job-site drilling applications where a reliable threaded-mount keyed chuck is required. Typical scenarios include drill press setups, handheld corded drills with a 3/8-24 threaded spindle, and bench-mounted drilling fixtures. The keyed design provides a firm grip on the bit shank, making it well-suited for repetitive drilling tasks in wood, metal, and plastic where bit slippage must be avoided.

Key Features

• Capacity range from 5/64 inch to 1/2 inch accommodates a wide variety of bit shank sizes
• 3/8-24 threaded mount for direct spindle installation without adapters on compatible tools
• Keyed design with K32 key for secure bit clamping and positive release
• Steel chuck body construction for resistance to wear and deformation
• Closed length of 3.09 inches and open length of 2.43 inches for compact fitment
• Plain bearing type for straightforward operation and maintenance

Compatibility

Designed as an OEM-style replacement or direct-fit chuck for drilling equipment with a 3/8-24 threaded spindle and a maximum capacity requirement of 1/2 inch.

Installation Notes

Installation should be performed by a qualified technician familiar with rotating power tool components. Disconnect and de-energize the drill or drill press completely before removing the existing chuck or installing a replacement. Thread the chuck onto the spindle by hand first to confirm engagement, then tighten according to the tool manufacturer's torque guidance. Verify the K32 key is fully seated and removed before operating the tool.