Jacobs JCM6314 Drill Chuck Threaded Mount 5/8-16 Keyed

Product Description

The JACOBS JCM6314 is a keyed drill chuck designed for threaded-mount spindles using a 5/8-16 thread size. It accepts drill bit shanks from 0.1969 inches up to 0.8 inches in diameter, covering a wide range of drilling applications across ferrous and non-ferrous materials. The chuck body is constructed from steel and uses a plain bearing design. Tightening is performed with the included K4 key for positive bit retention under load. At 2.875 pounds, this is a solid, production-grade chuck suited for installation on drill presses and milling machines in shop, industrial, or trade environments.

This chuck is appropriate for stationary drilling equipment requiring a 5/8-16 threaded spindle interface. Typical applications include drill press upgrades or replacements in machine shops, fabrication shops, and maintenance departments. The keyed design makes it a reliable choice when consistent grip force is required across repeated tool changes, especially when working with larger-diameter bits or aggressive feed rates. Technicians and machinists performing spindle tooling replacements will find the straightforward threaded mount reduces installation time.

Key Features

• Capacity range from 0.1969 inches to 0.8 inches accommodates a broad selection of drill bit shank sizes
• Threaded mount with 5/8-16 thread for direct spindle installation without an adapter arbor on compatible machines
• Keyed chuck with K4 key provides positive clamping force and reduces bit slippage under load
• Steel chuck body for durability in continuous-use shop environments
• 2.54-inch sleeve diameter and a closed length of 4.12 inches for reference when checking spindle clearance
• Plain bearing design minimizes maintenance requirements

Compatibility

Designed for drill presses and machine tool spindles with a 5/8-16 threaded mount. Confirm spindle thread size before installation; no specific model compatibility data was provided in the product information.

Installation Notes

Installation and removal should be performed by a qualified machinist or maintenance technician. Always disconnect and lock out power to the drill press or machine tool before working on the spindle assembly. Thread the chuck onto the spindle by hand before applying a final snug fit; consult the machine manufacturer's documentation for proper installation torque and procedure. Inspect the K4 key and key socket for wear before placing the chuck into service.