Gibraltar 290-1183 Lathe Chuck Key 12 Inch 3-jaw

Product Description

The GIBRALTAR 290-1183 is a lathe chuck key designed for use with 12-inch chuck diameter lathes. It features a self-ejecting mechanism that automatically releases the key from the chuck socket, reducing the risk of the key being left in the chuck during operation. The body measures 4.53 inches in length, and the actual key square size is 0.512 inches. This tool is used by machinists, tool and die workers, and shop technicians who need a reliable, safe chuck key for manual lathe operations in production or job-shop environments.

This chuck key is compatible with 3-jaw chucks on lathes with a 12-inch chuck diameter. It is suited for use in machine shops, maintenance facilities, and vocational training environments where manual lathe operation is standard. The self-ejecting design is particularly valued in production settings where operator safety and workflow efficiency are priorities.

Key Features

• Self-ejecting mechanism reduces risk of chuck key being left in the chuck
• Designed for 12-inch chuck diameter compatibility
• Body length of 4.53 inches for adequate leverage and reach
• Actual key square size of 0.512 inches for precise socket engagement
• Compatible with 3-jaw chuck configurations

Compatibility

Compatible with 3-jaw lathe chucks with a 12-inch chuck diameter.

Installation Notes

Installation and use of this chuck key should be performed by qualified machinists or trained shop personnel. Always ensure the lathe is fully powered down and at rest before inserting or removing the chuck key. The self-ejecting feature is a safety aid and does not replace proper operator procedure. Follow all applicable machine shop safety standards and equipment manufacturer guidelines during chuck work.