Bridgeport 12550007 Drive Key I Series Milling Machines

Product Description

The BRIDGEPORT 12550007 is a replacement drive key designed for use in Bridgeport milling machine assemblies. A drive key is a precision-fit fastening component that locks rotating parts into alignment, preventing slippage between mating surfaces such as shafts and hubs. This part is specific to the 2J-Head Top Housing and is integral to maintaining accurate spindle drive function. Licensed machinists, millwrights, and machine tool technicians typically source this part during scheduled maintenance or after wear inspection reveals key failure or deformation.

This drive key is intended for use with I Series Milling Machines equipped with the 2J-Head configuration. It is a direct OEM-style replacement part suited to shops running Bridgeport-style knee mills in both production and toolroom environments. The 2J-Head is one of the most common milling head configurations in job shops and vocational settings, making this a frequently needed service component.

Key Features

• OEM replacement drive key for the 2J-Head Top Housing assembly
• Designed to maintain positive drive engagement between mating rotating components
• Precision fit for I Series Milling Machine spindle drive systems
• Sold individually — package quantity of 1

Compatibility

Designed for use with Bridgeport I Series Milling Machines with 2J-Head Top Housing. Confirm head configuration and series designation before ordering to ensure correct fitment.

Installation Notes

Installation should be performed by a qualified machinist or millwright familiar with milling machine spindle assemblies. Always disconnect and lock out electrical power to the machine before accessing the head assembly. Use appropriate drive tools to seat the key without deforming the keyway. Inspect the mating keyway in the housing and shaft for wear or damage before installing the replacement key.