Gibraltar 290-1185 Lathe Chuck Key 25 in Four-jaw

Product Description

The GIBRALTAR 290-1185 is a self-ejecting lathe chuck key designed for use with four-jaw lathe chucks requiring a 25-inch chuck diameter compatibility. Built for machining environments, this chuck key features a 5.51-inch body length and an actual key square size of 0.748 inches, making it a precise fit for compatible chuck configurations. The self-ejecting mechanism reduces the risk of the key being left in the chuck during spindle startup, which is a critical safety feature on any lathe. This tool is intended for use by machinists and tool-room professionals working with manual lathes in production or job-shop settings.

This chuck key is suited for four-jaw independent lathe chucks where accurate jaw adjustment is required. The 25-inch chuck diameter compatibility rating indicates fitment with large-format lathe chucks commonly found in heavy-duty turning operations. The 0.748-inch square drive engages the chuck's bevel gear socket directly, allowing precise and repeatable jaw positioning. It is appropriate for both setup and production use in machine shops handling large-diameter workpieces.

Key Features

• Self-ejecting design reduces risk of key-in-chuck incidents during spindle operation
• Compatible with four-jaw independent lathe chucks
• 25-inch chuck diameter compatibility for large-format turning applications
• 5.51-inch body length provides adequate leverage for chuck jaw adjustment
• 0.748-inch actual key square size for precise bevel gear socket engagement
• Single-piece packaging with a minimum order quantity of one unit

Compatibility

Designed for use with four-jaw lathe chucks rated at 25-inch chuck diameter compatibility. Confirm the bevel gear socket size on the chuck matches the 0.748-inch key square before installation.

Installation Notes

Chuck key replacement and use should be performed by qualified machinists or toolroom personnel. Always ensure the lathe spindle is fully stopped and the machine is powered down before inserting or removing the chuck key. Never leave a chuck key inserted in the chuck when the lathe is unattended or prior to spindle engagement. Verify chuck socket dimensions against the key square size before use to avoid damage to the bevel gear.