Gibraltar 290-1186 Lathe Chuck Key 25 Inch Chuck Diameter

Product Description

The GIBRALTAR 290-1186 is a self-ejecting lathe chuck key designed for use with large-format lathe chucks up to 25 inches in diameter. The key features a body length of 5.12 inches and an actual key square size of 0.6693 inches, making it suited for heavy-duty turning operations where a secure, properly fitting chuck interface is essential. The self-ejecting mechanism reduces operator handling time between tool changes and helps prevent the key from being left in the chuck during spindle engagement. Machinists and toolroom technicians working with industrial lathes will find this key compatible with standard 4-jaw chuck configurations at the specified diameter range.

This chuck key is intended for use in machine shop and industrial manufacturing environments where large-diameter 4-jaw independent chucks are common. Typical applications include heavy turning, boring, and facing operations on industrial lathes. The 25-inch chuck diameter compatibility positions this key for use with large-capacity lathe setups found in production shops, toolrooms, and maintenance facilities. It is installed and used by machinists, tool and die makers, and industrial maintenance technicians.

Key Features

• Self-ejecting design reduces risk of key being left in chuck during operation
• Compatible with 4-jaw lathe chucks up to 25 inches in diameter
• Body length of 5.12 inches provides adequate leverage for large chuck tightening
• Key square size of 0.6693 inches ensures precise fit in standard drive sockets
• Sold individually as a single-piece unit

Compatibility

Designed for use with 4-jaw independent lathe chucks with a chuck diameter compatibility of 25 inches and a drive socket matching the 0.6693-inch key square size.

Installation Notes

Always ensure the lathe spindle is fully stopped and the machine is powered down before inserting or removing the chuck key. Verify that the key square size matches the drive socket on the chuck before applying torque. The self-ejecting feature is a safety aid but does not replace proper lockout/tagout procedures required by OSHA and facility safety standards. Inspect the key square for wear or rounding before each use to prevent slippage during chuck adjustment.