Jacobs JCM6232 Drill Chuck 1/8 to 5/8 in Threaded Mount

Product Description

The JACOBS JCM6232 is a keyed drill chuck designed for threaded-mount applications requiring a secure, repeatable grip on round-shank tooling. It accepts drill bit shanks from 1/8 inch to 5/8 inch (0.125 to 0.625 inches) and mounts via a 5/8-16 threaded arbor interface. The chuck body is steel construction with a plain bearing, a sleeve diameter of 2.29 inches, and uses a K3 key for tightening. Closed length is 3.81 inches and open length is 2.84 inches. This chuck suits drill presses, lathes, and similar machine tool setups where precise, tool-free chuck changes are not required and positive key-tightened grip is preferred.

The JCM6232 is used in stationary machine tool applications including drill presses and milling machine setups that use a 5/8-16 threaded spindle nose. It is appropriate for production shops, maintenance environments, and trade professionals who need a reliable keyed chuck for drilling steel, wood, plastics, or similar materials. The keyed design provides higher grip force than keyless alternatives, making it well suited for larger diameter bits and tougher materials.

Key Features

• Capacity range from 1/8 inch to 5/8 inch accommodates a wide variety of drill bit shank sizes
• 5/8-16 threaded mount for direct spindle installation on compatible drill presses and lathes
• K3 keyed tightening delivers positive grip force, reducing bit slippage under load
• Steel chuck body for durability in repeated industrial and shop use
• 2.29-inch sleeve diameter with plain bearing construction
• Compact closed length of 3.81 inches limits spindle-to-workpiece clearance loss

Compatibility

Designed as a replacement or upgrade keyed drill chuck for drill presses, lathes, and machine tools equipped with a 5/8-16 threaded spindle nose and requiring a chuck with 1/8 to 5/8 inch capacity.

Installation Notes

Installation should be performed by a qualified machinist or mechanical trades professional with the machine fully powered down and locked out per OSHA lockout/tagout procedures. Thread the chuck onto the 5/8-16 spindle nose by hand until fully seated, then verify that the chuck runs true before applying load. Use the K3 chuck key to tighten the jaws onto tooling before each use and confirm the key is removed before starting the machine. Inspect jaw and sleeve condition periodically for wear that could affect concentricity or grip.